CONTROL OF WEEDS IN CORN (FIELD AND SWEET) …€¦ · planted: 98/05/15, 75600 se/ha, 5 cm deep, 75 cm row width. planting method: precision planter. fert broadcast on 98/05/13 at

35

CONTROL OF WEEDS IN CORN (FIELD AND SWEET)

COMPARISON OF METOLACHLOR FORMULATIONS IMPREGNATED ON FERTILIZER ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98A1 CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 FERT MAINT APPL: 0.6 KG AI/HA OF BANVEL (HERBICIDE). PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 3 X 8M. PLOT AREA: 24 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 6, %SAND: 44, %SILT: 34, %CLAY: 22, SOIL PH: 7.6. MATERIALS AND METHODS: THE METOLACHLOR FORMULATIONS WERE APPLIED IMPREGNATED ON 275 KG/HA OF 46-0-0. THE WEEDY CHECK RECEIVED 275 KG/HA OF UNTREATED 46-0-0. THE TREATMENTS WERE INCORPORATED WITH 2 PASSES (IN OPPOSITE DIRECTIONS) OF AN S-TINE CULTIVATOR WITH ROLLING BASKET HARROWS. THE "OTHER" ASSESSMENT IN COLUMN 7 IS THE CORN YIELD IN BU/ACRE.

------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD GREEN BARNYA GREEN FIELD FIELD T | GROWTH ST INFO# CORN CORN FOXTAI GRASS FOXTAI CORN CORN R | | INCORP INFO# RATE % 37M81 37M81 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 T/HA ASSESS ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0B 0B 0B 11.9 189 2 1 1 METOLACHLOR 1.92 48EC 0 0 84A 95A 75A 12.1 192 3 1 1 F CGA 77102 1.14 76EC 0 0 69A 70A 59A 12.4 197 F BENOXACOR 3.8EC NFS NFS 45 LSD 46 LSD 52 LSD NFS NFS 5% 5% 5% 0 SE 0 SE 26 SE 27 SE 30 SE 0.65 SE 10.3 SE 0 CV 87 CV 52 CV 48 CV 67 CV 5 CV 5 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 12 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980602 980616 980616 980616 980716 981020 981020 LEAF RANGE -4 4 -8 3 -12 3 -12 HEIGHT (CM) 15-25 15-40 10-20 5-15 50-90 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 6.5 1.5 11-----------------------------------------------------------------------------------------------------------------------------------BENOXACOR -CGC; CGA 77102 -CGC; METOLACHLOR -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 PPI-S DROP SPREAD GRN 31 27 6 98/05/15 1000 9.4 0 4.8 46 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ | 1 98/05/14 LIGHT DUTY CULTIVATO 10------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THE HERBICIDES IN THIS TRIAL WERE IMPREGNATED ON FERTILIZER AND INCORPORATED PRIOR TO PLANTING THE CORN. DICAMBA WASAPPLIED ACROSS THE ENTIRE TRIAL FOR BROADLEAF WEED CONTROL. THERE WAS NO INJURY IN FIELD CORN WITH THE TWO FORMULATIONS OF METOLACHLOREVALUATED. THE LEVEL OF WEED CONTROL WITH THE TWO FORMULATIONS OF METOLACHLOR WAS STATISTICALLY EQUIVALENT, ALTHOUGH THERE WAS A TRENDTO IMPROVED CONTROL WITH THE 480 EC FORMULATION. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

36


EFFECT OF TIME OF APPLICATION ON WEED CONTROL WITH EXP31130A ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98A2A CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/13, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: WHEAT, WINTER (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 17, MAY: 19, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/19. SITE DESCRIPTION: SOIL TEXTURE: SILT LOAM. %OM: 7, %SAND: 49, %SILT: 34, %CLAY: 15, SOIL PH: 6.1. MATERIALS AND METHODS: ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS R-ROOT VELVET LADYS LAMBS R-ROOT VELVET LADYS COMMON T | GROWTH ST INFO# CORN CORN QUARTE P-WEED LEAF THUMB QUARTE P-WEED LEAF THUMB RAGWEE R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0C 0E 0G 0D 0D 0C 0E 0D 0C 2 1 ISOXAFLUTOLE 0.079 75WG 0 0 91A 80A-D 60B-E 43BCD 85AB 51B 71ABC 18BCD 43BC 3 2 ISOXAFLUTOLE 0.079 75WG 0 0 89A 73CD 20FG 0D 68B 50B 44CD 13CD 70AB 4 3 1 ISOXAFLUTOLE 0.079 75WG 0 0 0C 73CD 88AB 55ABC 0D 50B 100A 75A 86A 5 1 T ISOXAFLUTOLE 0.079 75WG 0 0 94A 89ABC 38D-G 41BCD 73AB 75AB 45CD 75A 65AB T ATRAZINE 0.8 90WG 6 2 T ISOXAFLUTOLE 0.079 75WG 0 0 91A 78BCD 40C-F 73AB 71B 69AB 38CD 61ABC 94A T ATRAZINE 0.8 90WG 7 3 1 T ISOXAFLUTOLE 0.079 75WG 0 0 44B 91ABC 95AB 86AB 13CD 88A 94AB 68AB 100A T ATRAZINE 0.8 90WG 8 1 ISOXAFLUTOLE 0.105 75WG 0 0 94A 75BCD 69A-D 65AB 79AB 63AB 45CD 69AB 71AB 9 2 ISOXAFLUTOLE 0.105 75WG 0 0 86A 68D 25EFG 13CD 71B 61AB 63BC 0D 91A 10 3 1 ISOXAFLUTOLE 0.105 75WG 0 0 0C 79BCD 99A 65AB 0D 85A 100A 75A 100A 11 1 T ISOXAFLUTOLE 0.105 75WG 0 0 90A 85A-D 40C-F 70AB 91AB 69AB 55CD 75A 100A T ATRAZINE 1.063 90WG12 2 T ISOXAFLUTOLE 0.105 75WG 0 0 95A 74CD 20FG 78AB 78AB 74AB 23DE 94A 75AB T ATRAZINE 1.063 90WG13 3 1 T ISOXAFLUTOLE 0.105 75WG 0 0 58B 95AB 95AB 95A 33C 90A 96AB 94A 93A T ATRAZINE 1.063 90WG14 3 1 F CGA 77102 1.14 91.5EC 0 0 100A 100A 76ABC 95A 98A 85A 55CD 73A 100A F BENOXACOR 4.5EC F DICAMBA 1.6 40.1SU F ATRAZINE SU NFS NFS 14.5LSD 20 LSD 38 LSD 50.1LSD 26.2LSD 31.5LSD 35.5LSD 54 LSD 43.5LSD 5% 5% 5% 5% 5% 5% 5% 5% 5% 0 SE 0 SE 10.1SE 14 SE 26.7SE 35 SE 18.3SE 22 SE 25 SE 38 SE 30.4SE 0 CV 0 CV 15.3CV 18.6CV 48.9CV 63.1CV 33.9CV 34 CV 42 CV 67.7CV 39.1CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980602 980616 980616 980616 980616 980616 980717 980717 980717 980717 980717 LEAF RANGE 5 -6 8 10-20 12-20 4 -10 8 -20 HEIGHT (CM) 20-30 50 15-70 25-35 12-35 5-30 90-160 110-130 80-130 60-90 75-135 GROWTH STAGE WEED DENSITY (PL/SQ.M) 29 22 12 13.5 22 7 5 9.5 6 -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -BAZ (14:1); ATRAZINE -CGC ( 5:1); BENOXACOR -CGC; CGA 77102 -CGC; DICAMBA -BAZ; ISOXAFLUTOLE (EXP 31130A) -RPC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PP-S CO2 SPRAYER 0.5 19 42 3 98/04/29 1615 12 30 9.4 3 25 2 200 200 PP-S CO2 SPRAYER 0.5 22 45 6 98/05/06 1430 30 9.4 0 55 16 3 200 200 PE CO2 SPRAYER 0.5 20 52 2 98/05/17 2030 2.2 0 4.8 44 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 LAMBS QUARTE 6 .5 5 30 | R-ROOTP-WEED 2 .5 1 COTLYN 26 | VELVETLEAF 2 1 3 5 | LADYS THUMB 4 .5 5 COTLYN 12 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS GREATER VARIATION AND POORER WEED CONTROL IN THIS EXPERIMENT THAN NORMALLY EXPECTED SINCE THERE WAS VERY LITTLE RAINFALL AFTER APPLICATION TO ACTIVATE THE HERBICIDES. THERE WAS NO INJURY IN FIELD CORN WITH THE EXP 31130A. LAMB'S-QUARTERS CONTROL DECREASED RAPIDLY AS THE APPLICATION TIMING WAS DELAYED, WHICH MAY BE DUE TO LACK OF RAINFALL TO ACTIVATE THE HERBICIDE AND ALSO THAT SOME OF THE LAMB'S-QUARTERS HAD EMERGED AT THE TIME OF APPLICATION. CONVERSELY, THERE WAS A TREND TO IMPROVED CONTROL OF PIGWEED, RAGWEED, LADY'S THUMB AND VELVETLEAF CONTROL AS THE APPLICATION TIMING WAS DELAYED. (SEE ALSO EXPERIMENT ID:FC98A2B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

37


EFFECT OF TIME OF APPLICATION ON WEED CONTROL WITH EXP31130A ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98A2B CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/13, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: WHEAT, WINTER (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 17, MAY: 19, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/19. SITE DESCRIPTION: SOIL TEXTURE: SILT LOAM. %OM: 7, %SAND: 49, %SILT: 34, %CLAY: 15, SOIL PH: 6.1. MATERIALS AND METHODS: THE "OTHER" ASSESSMENT IN COLUMN 9 IS CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS R-ROOT LADYS VELVET COMMON GREEN CRAB FIELD FIELD T | GROWTH ST INFO# QUARTE P-WEED THUMB LEAF RAGWEE FOXTAI GRASS CORN CORN R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC PLANTS PLANTS PLANTS PLANTS PLANTS PLANTS PLANTS YIELD OTHER # V V V MIX MANAGEMENT (AI) #/SQ M #/SQ M #/SQ M #/SQ M #/SQ M #/SQ M #/SQ M T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 18AB 6 5A-D 3 3 1C 1 4.4E 69E 2 1 ISOXAFLUTOLE 0.079 75WG 2D 9 9A 2 2 1C 1 11.8BC 188BC 3 2 ISOXAFLUTOLE 0.079 75WG 3CD 5 7ABC 6 1 3ABC 7 11.6BC 185BC 4 3 1 ISOXAFLUTOLE 0.079 75WG 17AB 4 2DE 4 1 1C 0 6.9D 110D 5 1 T ISOXAFLUTOLE 0.079 75WG 1D 4 4B-E 5 2 1C 2 13.4AB 213AB T ATRAZINE 0.8 90WG 6 2 T ISOXAFLUTOLE 0.079 75WG 1D 1 5A-E 7 2 1C 4 12.5ABC 199ABC T ATRAZINE 0.8 90WG 7 3 1 T ISOXAFLUTOLE 0.079 75WG 10BC 0 1DE 1 1 4ABC 6 10.9C 174C T ATRAZINE 0.8 90WG 8 1 ISOXAFLUTOLE 0.105 75WG 1D 9 2DE 5 0 3ABC 6 12.2ABC 194ABC 9 2 ISOXAFLUTOLE 0.105 75WG 1D 11 8AB 4 1 6A 0 12.5ABC 199ABC10 3 1 ISOXAFLUTOLE 0.105 75WG 24A 3 0E 0 0 5ABC 0 8.6D 138D 11 1 T ISOXAFLUTOLE 0.105 75WG 1A 7 4B-E 6 1 2BC 0 13.4AB 214AB T ATRAZINE 1.063 90WG12 2 T ISOXAFLUTOLE 0.105 75WG 2CD 2 2DE 7 0 1C 2 12.4ABC 198ABC T ATRAZINE 1.063 90WG13 3 1 T ISOXAFLUTOLE 0.105 75WG 8CD 0 1DE 0 1 6AB 3 11.8BC 187BC T ATRAZINE 1.063 90WG14 3 1 F CGA 77102 1.14 91.5EC 1D 0 2CDE 6 0 6AB 5 14.2A 226A F BENOXACOR 4.5EC F DICAMBA 1.6 40.1SU F ATRAZINE SU 8.2 LSD NFS 4.7 LSD NFS NFS 4.1 LSD NFS 2.12LSD 33.9LSD 5% 5% 5% 5% 5% 5.7 SE 6 SE 3.3 SE 4.1 SE 1.4 SE 2.9 SE 4.8 SE 1.49SE 23.7SE 91.9CV 148 CV 97 CV 108 CV 153 CV 112 CV 192 CV 13.3CV 13.3CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) .25 .25 .25 .25 .25 .25 .25 12 12 NUMBER OF SAMPLES 2 2 2 2 2 2 2 1 1 DATE ASSESSED (YYMMDD) 980727 980727 980727 980727 980727 980727 980727 981019 981019 LEAF RANGE HEIGHT (CM) GROWTH STAGE WEED DENSITY (PL/SQ.M) -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -BAZ (14:1); ATRAZINE -CGC ( 5:1); BENOXACOR -CGC; CGA 77102 -CGC; DICAMBA -BAZ; ISOXAFLUTOLE (EXP 31130A) -RPC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PP-S CO2 SPRAYER 0.5 19 42 3 98/04/29 1615 12 30 9.4 3 25 2 200 200 PP-S CO2 SPRAYER 0.5 22 45 6 98/05/06 1430 30 9.4 0 55 16 3 200 200 PE CO2 SPRAYER 0.5 20 52 2 98/05/17 2030 2.2 0 4.8 44 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 LAMBS QUARTE 6 .5 5 30 | R-ROOTP-WEED 2 .5 1 COTLYN 26 | VELVETLEAF 2 1 3 5 | LADYS THUMB 4 .5 5 COTLYN 12 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: . (SEE ALSO EXPERIMENT ID:FC98A2A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

38


WEED CONTROL EVALUATIONS WITH NAF-72 IMPREGNATED ON FERTILIZER ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98A3 CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 FERT MAINT APPL: NICOSULFURON 0.025 KG/HA (HERBICIDE). PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 19, AUG: 21, SEP: 21, OCT: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 6, %SAND: 40, %SILT: 37, %CLAY: 21, SOIL PH: 7.6. MATERIALS AND METHODS: THE NAF-72 WAS APPLIED IMPREGNATED ON 100, 200, AND 300 KG/HA OF UREA FOR TREATMENTS 3, 4, AND 5 RESPECTIVELY. TREATMENT 2 WAS APPLIED IN WATER. EACH TREATMENT HAD UNTREATED UREA APPLIED SEPARATELY TO TOTAL 300 KG/HA. THE TREATMENTS WERE INCORPORATED WITH 2 PASSES (IN OPPOSITE DIRECTIONS) OF AN S-TINE CULTIVATOR WITH ROLLING BASKET HARROWS. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD R-ROOT LAMBS VELVET E-BLAC R-ROOT LAMBS VELVET COMMON FIELD T | GROWTH ST INFO# CORN CORN P-WEED QUARTE LEAF N-SHAD P-WEED QUARTE LEAF RAGWEE CORN R | | INCORP INFO# RATE % 37M81 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL YIELD # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 T/HA ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0B 0B 0 0 0B 0B 0B 0B 11.0 2 1 NAF-72 0.185 85.6WG 0 0 78A 74A 68 58 97A 60A 84A 100A 10.6 3 2 1 NAF-72 0.185 85.6WG 0 0 86A 79A 35 63 94A 77A 80A 100A 10.7 4 2 1 NAF-72 0.185 85.6WG 0 0 89A 78A 50 73 96A 91A 66A 88A 11.0 5 2 1 NAF-72 0.185 85.6WG 0 0 90A 80A 70 61 100A 81A 91A 100A 11.1 NFS NFS 15 LSD 16 LSD NFS NFS 10.3LSD 38.7LSD 38 LSD 17.3LSD NFS 5% 5% 5% 5% 5% 5% 0 SE 0 SE 9.7 SE 10.6SE 34.5SE 35 SE 6.7 SE 25 SE 25 SE 11.2SE .46 SE 0 CV 0 CV 14.2CV 17.1CV 77.6CV 69.5CV 8.7 CV 40.6CV 38.7CV 14.5CV 4.2 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 16 16 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980602 980616 980616 980616 980616 980616 980716 980716 980716 980716 981020 LEAF RANGE 4 -5 7 -8 4 -16 6 -18 4 -10 HEIGHT (CM) 15-25 20-45 1-13 4-10 5-14 35-95 20-95 50 GROWTH STAGE WEED DENSITY (PL/SQ.M) 1.5 3.5 2.5 4.5 5.5 0.5 -----------------------------------------------------------------------------------------------------------------------------------NAF-72 -DWE; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PPI-S CO2 SPRAYER 0.5 31 27 6 98/05/15 1130 9.4 0 4.8 46 16 2 PPI-S DROP SPREAD GRN 31 27 6 98/05/15 1130 9.4 0 4.8 46 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ | 1 98/05/15 LIGHT DUTY CULTIVATO 10------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THE HERBICIDES IN TREATMENTS 3, 4, AND 5 WERE IMPREGNATED ON FERTILIZER AND INCORPORATED PRIOR TO PLANTING THE CORN. NICOSULFURON WAS APPLIED ACROSS THE ENTIRE TRIAL FOR ANNUAL GRASS CONTROL. THERE WAS NO INJURY IN FIELD CORN WITH NAF-72. THE LEVEL OF BROADLEAF WEED CONTROL WAS EQUIVALENT WHEN NAF-72 WAS APPLIED IN WATER AND WHEN IT WAS IMPREGNATED ON FERTILIZER. NAF-72 PROVIDED GOOD CONTROL OF VELVETLEAF AND LAMB'S-QUARTERS, AND EXCELLENT CONTROL OF PIGWEED AND RAGWEED. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

39


EVALUATION OF FOE5043/AMS13414 APPLIED PREEMERGENCE IN CORN ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98B1A CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 7, %SAND: 42, %SILT: 36, %CLAY: 21, SOIL PH: 7.4. MATERIALS AND METHODS: THE "OTHER HERBICIDE #1" WAS AMS13414. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS R-ROOT VELVET GREEN LAMBS R-ROOT VELVET PROSTR GREEN T | GROWTH ST INFO# CORN CORN QUARTE P-WEED LEAF FOXTAI QUARTE P-WEED LEAF P-WEED FOXTAI R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0C 0C 0C 0D 0C 0C 0C 0B 0C 2 1 F FOE-5043 0.488 58WG 0 0 64B 97A 98A 76A 63B 95A 93A 75A 75A F OTHER HERB #1 WG 3 1 F FOE-5043 0.61 58WG 0 0 68B 95A 99A 50BC 86AB 94A 98A 75A 44ABC F OTHER HERB #1 WG 4 1 F FOE-5043 0.976 58WG 0 0 90A 100A 75A 83A 88AB 96A 98A 95A 33ABC F OTHER HERB #1 WG 5 1 F FOE-5043 1.22 58WG 0 0 98A 100A 100A 85A 96A 100A 99A 100A 59AB F OTHER HERB #1 WG 6 1 F FOE-5043 0.488 58WG 0 0 93A 99A 99A 70AB 90A 97A 98A 100A 28BC F OTHER HERB #1 WG T ATRAZINE 0.80 90WG 7 1 F FOE-5043 0.61 58WG 0 0 92A 100A 100A 78A 83AB 100A 98A 95A 21BC F OTHER HERB #1 WG T ATRAZINE 0.80 90WG 8 1 ATRAZINE 0.8 90WG 0 0 71B 69B 40B 36C 76AB 30B 38B 100A 13C 9 1 F METOLACHLOR 1.92 93.5EC 0 0 63B 94A 93A 51BC 75AB 95A 88A 100A 10C F BENOXACOR 3EC T DICAMBA 0.60 48SN NFS NFS 10.8LSD 11 LSD 32 LSD 23.7LSD 25.6LSD 19.2LSD 25.6LSD 31 LSD 45 LSD 5% 5% 5% 5% 5% 5% 5% 5% 5% 0 SE 0 SE 7.4 SE 7.6 SE 22 SE 16.3SE 17.6SE 13 SE 17.5SE 21 SE 30.9SE 0 CV 0 CV 10.4CV 9.1 CV 28 CV 27.7CV 24 CV 16.8CV 22.3CV 25.8CV 98.8CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980602 980618 980618 980618 980618 980618 980716 980716 980716 980716 980716 LEAF RANGE 4 -5 5 -9 6 -20 5 -20 6 3 -12 12-20 8 -20 8 - HEIGHT (CM) 15-25 30-70 6-18 4-25 10 10-30 100-150 10-140 90-115 60-120 GROWTH STAGE WEED DENSITY (PL/SQ.M) 15 10 0.5 16.5 15.5 12.5 1.5 13.5-----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -CGC; BENOXACOR -CGC; DICAMBA -BAZ; FOE-5043 -CHH; METOLACHLOR -CGC; OTHER HERBICIDE #1 -CHH; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PE CO2 SPRAYER 0.5 19 71 0 98/05/19 2030 0.4 4.6 9 42 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS GREATER VARIATION AND POORER WEED CONTROL IN THIS EXPERIMENT THAN NORMALLY EXPECTED SINCE THERE WAS VERY LITTLE RAINFALL IN THE FIRST SEVEN WEEKS AFTER APPLICATION TO ACTIVATE THE HERBICIDES. FOE5043/AMS13414 PROVIDED EXCELLENT CONTROL OF PIGWEED AND VELVETLEAF, AND FAIR TO GOOD CONTROL OF LAMB'S-QUARTERS, PROSTRATE PIGWEED, AND GREEN FOXTAIL. THE ADDITION OF ATRAZINE IMPROVED THE LAMB'S-QUARTERS AND PROSTRATE PIGWEED CONTROL. FOE5043/AMS13414, AND METOLACHLOR PLUS DICAMBA PROVIDED AN EQUIVALENT LEVEL OF WEED CONTROL. (SEE ALSO EXPERIMENT ID:FC98B1B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

40


EVALUATION OF FOE5043/AMS13414 APPLIED PREEMERGENCE IN CORN ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98B1B CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 7, %SAND: 42, %SILT: 36, %CLAY: 21, SOIL PH: 7.4. MATERIALS AND METHODS: THE "OTHER HERBICIDE #1" WAS AMS13414. THE "OTHER" ASSESSMENT IN COLUMN 6 IS CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS R-ROOT VELVET GREEN FIELD FIELD T | GROWTH ST INFO# QUARTE P-WEED LEAF FOXTAI CORN CORN R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC PLANTS PLANTS PLANTS PLANTS YIELD OTHER # V V V MIX MANAGEMENT (AI) #/SQ M #/SQ M #/SQ M #/SQ M T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 9.5 4.5 1.5 5.0 5.9E 94E 2 1 F FOE-5043 0.488 58WG 11.0 0.5 0.0 3.0 9.3D 148D F OTHER HERB #1 WG 3 1 F FOE-5043 0.61 58WG 8.5 2.5 0.0 7.0 10.3BC 165BC F OTHER HERB #1 WG 4 1 F FOE-5043 0.976 58WG 4.0 0.0 1.0 7.5 11.6A 184A F OTHER HERB #1 WG 5 1 F FOE-5043 1.22 58WG 6.0 2.5 0.5 8.0 11.3A 180A F OTHER HERB #1 WG 6 1 F FOE-5043 0.488 58WG 3.5 0.0 0.5 7.5 11.5A 184A F OTHER HERB #1 WG T ATRAZINE 0.80 90WG 7 1 F FOE-5043 0.61 58WG 1.5 1.5 1.5 10.5 11.2AB 179AB F OTHER HERB #1 WG T ATRAZINE 0.80 90WG 8 1 ATRAZINE 0.8 90WG 7.0 7.0 1.0 9.0 9.0D 143D 9 1 F METOLACHLOR 1.92 93.5EC 3.0 1.0 0.0 14.5 9.7CD 155CD F BENOXACOR 3EC T DICAMBA 0.60 48SN NFS NFS NFS NFS 0.99LSD 15.6LSD 5% 5% 4.8 SE 3.7 SE 1.3 SE 5.9 SE 0.68SE 10.7SE 80 CV 171 CV 199 CV 74.3CV 6.8 CV 6.7 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) .25 .25 .25 .25 12 12 NUMBER OF SAMPLES 2 2 2 2 1 1 DATE ASSESSED (YYMMDD) 980727 980727 980727 980727 981020 981020 LEAF RANGE HEIGHT (CM) GROWTH STAGE WEED DENSITY (PL/SQ.M) -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -CGC; BENOXACOR -CGC; DICAMBA -BAZ; FOE-5043 -CHH; METOLACHLOR -CGC; OTHER HERBICIDE #1 -CHH; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PE CO2 SPRAYER 0.5 19 71 0 98/05/19 2030 0.4 4.6 9 42 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: . (SEE ALSO EXPERIMENT ID:FC98B1A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

41


BROADSPECTRUM WEED CONTROL IN CORN WITH FLUMETSULAM/CLOPYRALID PLUS DIMETHENAMID ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98B3 CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: SANDY LOAM. %OM: 6, %SAND: 55, %SILT: 28, %CLAY: 16, SOIL PH: 7.5. MATERIALS AND METHODS: APPLICATION # 2 WAS MADE IMMEDIATELY AFTER APPLICATION # 1 TO SIMULATE A SPRAY OVERLAP. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD R-ROOT LAMBS VELVET GREEN BARNYA LAMBS R-ROOT VELVET FIELD T | GROWTH ST INFO# CORN CORN P-WEED QUARTE LEAF FOXTAI GRASS QUARTE P-WEED LEAF CORN R | | INCORP INFO# RATE % 37M81 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL YIELD # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 T/HA ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0G 0E 0C 0C 0C 0F 0C 0E 7.3D 2 1 NAF-72 0.185 85.6WG 0 0 71C-F 60D 63B 0C 0C 26EF 63AB 78ABC 8.5CD 3 1 NAF-72 0.185 85.6WG 0 0 86A-D 79ABC 96A 0C 0C 73A-D 78AB 97A 10.1AB 2 NAF-72 0.185 85.6WG 4 1 T NAF-72 0.185 85.6WG 0 0 83A-D 73BCD 85AB 43ABC 43ABC 50DE 51AB 81ABC 9.6ABC T DIMETHENAMID 1 90EC 5 1 T NAF-72 0.185 85.6WG 0 0 76B-E 83ABC 85AB 30BC 30ABC 83ABC 39BC 43CD 10.4A T DIMETHENAMID 1.25 90EC 6 1 T NAF-72 0.185 85.6WG 0 0 98AB 86AB 90A 35ABC 35ABC 89AB 79AB 86AB 9.6ABC T DIMETHENAMID 1.25 90EC 2 T NAF-72 0.185 85.6WG T DIMETHENAMID 1.25 90EC 7 1 T NAF-72 0.185 85.6WG 0 0 88A-D 84AB 80AB 33BC 33ABC 78A-D 75AB 78ABC 10.1AB T DIMETHENAMID 1 90EC T ATRAZINE 0.5 90WG 8 1 T NAF-72 0.185 85.6WG 0 0 86A-D 74BCD 84AB 0C 0C 61BCD 63AB 85AB 10.4A T DIMETHENAMID 1.25 90EC T ATRAZINE 0.5 90WG 9 1 T NAF-72 0.185 85.6WG 0 0 100A 94A 96A 83A 78A 96A 91A 99A 10.2A T DIMETHENAMID 1.25 90EC T ATRAZINE 0.5 90WG 2 T NAF-72 0.185 85.6WG T DIMETHENAMID 1.25 90EC T ATRAZINE 0.5 90WG10 1 DIMETHENAMID 1 90EC 0 0 56EF 65CD 78AB 20BC 20BC 53CDE 0C 25DE 7.5D 11 1 DIMETHENAMID 1.25 90EC 0 0 66DEF 60D 79AB 19BC 19BC 29EF 55AB 70ABC 7.3D 12 1 DIMETHENAMID 1.25 90EC 0 0 78A-E 84AB 78AB 63AB 61AB 83ABC 65AB 66ABC 8.6BCD 2 DIMETHENAMID 1.25 90EC13 1 ATRAZINE 0.5 90WG 0 0 53F 73BCD 81AB 0C 0C 69A-D 41B 79ABC 7.8D 14 1 T DIMETHENAMID 1.25 90EC 0 0 93ABC 86AB 85AB 48ABC 50AB 96A 71AB 88A 10.4A F DICAMBA 1.48 40.1SU F ATRAZINE SU15 1 T DIMETHENAMID 1.25 90EC 0 0 89A-D 81ABC 84AB 35ABC 35ABC 73A-D 90A 48BCD 10.0ABC T DICAMBA 0.6 48SN NFS NFS 23 LSD 17.9LSD 22.6LSD 48 LSD 48 LSD 32 LSD 40 LSD 39 LSD 1.45LSD 5% 5% 5% 5% 5% 5% 5% 5% 5% 0 SE 0 SE 16 SE 12.5SE 15.8SE 33.7SE 34 SE 22 SE 28 SE 27.5SE 1.01SE 0 CV 0 CV 22 CV 17.4CV 20.4CV 124 CV 125 CV 35 CV 49 CV 40.4CV 11 CV

------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 16 16 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980602 980616 980616 980616 980616 980616 980616 980716 980716 980716 981019 LEAF RANGE 4 -5 6 -8 2 -16 4 -20 2 -4 6 - 4 -6 8 -20 20- HEIGHT (CM) 15-25 30-65 3-24 6-24 3-17 16- 10-16 5-125 40-120 5-115 WEED DENSITY (PL/SQ.M) 26.5 15.5 4.5 0.5 1.4 26 29.5 10 -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -BAZ (14:1); ATRAZINE -CGC ( 7:1); DICAMBA -BAZ; DIMETHENAMID (SAN 582H) -BAZ; NAF-72 -DWE; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PE CO2 SPRAYER 0.5 20 60 6 98/05/19 0615 .4 4.6 9 42 16 2 200 200 PE CO2 SPRAYER 0.5 20 60 6 98/05/19 0615 .4 4.6 9 42 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS GREATER VARIATION AND POORER WEED CONTROL IN THIS EXPERIMENT THAN NORMALLY EXPECTED SINCE THERE WAS VERY LITTLE RAINFALL IN THE FIRST SEVEN WEEKS AFTER APPLICATION TO ACTIVATE THE HERBICIDES. THERE WAS NO INJURY WITH THE HERBICIDE TREATMENTS EVALUATED. NAF-72 PROVIDED FAIR TO GOOD CONTROL OF PIGWEED AND VELVETLEAF, BUT ONLY MARGINAL CONTROL OF LAMB'S-QUARTERS. THE TANKMIXES WITH DIMETHENAMID AND ATRAZINE IMPROVED THE LAMB'S-QUARTERS CONTROL. DIMETHENAMID ALONE PROVIDED POOR CONTROL OF GREEN FOXTAIL AND BARNYARD GRASS. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

42


WEED MANAGEMENT SYSTEMS IN CORN WITH PROSULFURON TANKMIXES ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C1A CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: SANDY LOAM. %OM: 6, %SAND: 55, %SILT: 28, %CLAY: 16, SOIL PH: 7.5. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS R-ROOT VELVET GREEN T | GROWTH ST INFO# CORN CORN QUARTE P-WEED LEAF FOXTAI R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0B 0C 0C 0D 2 1 METOLACHLOR 1.87 93.5EC 0 0 99A 95B 94AB 0D 2 1 T PROSULFURON 0.01 75WG T DICAMBA 0.14 70WG T AGRAL 90 0.2 OT 3 2 1 T PROSULFURON 0.01 75WG 0 0 100A 98AB 99A 96AB T DPX 79406 0.025 25WG T DICAMBA 0.14 70WG T AGRAL 90 0.2 100OT 4 2 1 T DPX 79406 0.025 25WG 0 0 100A 100A 95AB 98A T DICAMBA 0.288 48SN T AGRAL 90 0.2 100OT 5 2 1 T PROSULFURON 0.01 75WG 0 0 100A 99A 90B 91BC T NICOSULFURON 0.025 75WG T DICAMBA 0.14 70WG T AGRAL 90 0.2 100OT 6 2 1 T NICOSULFURON 0.025 75WG 0 0 100A 100A 88B 90C T DICAMBA 0.288 48SN T AGRAL 90 0.2 100OT NFS NFS 1.5 LSD 3.5 LSD 8.3 LSD 5.7 LSD 5% 5% 5% 5% 0 SE 0 SE 1 SE 2.3 SE 5.5 SE 3.8 SE 0 CV 0 CV 1.2 CV 2.8 CV 7.1 CV 6.0 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980617 980706 980706 980706 980706 980706 LEAF RANGE 7 -9 13 8 -20 4 -20 2 -20 3 -8 HEIGHT (CM) 30-50 90-140 10-80 4-80 4-60 9-80 GROWTH STAGE WEED DENSITY (PL/SQ.M) 20.5 37 8.5 8.5 -----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; DICAMBA -BAZ ( 4:1); DICAMBA -BAZ ( 6:1); DICAMBA -CGC ( 2:2); DICAMBA -CGC ( 5:1); DPX 79406 -DUQ; METOLACHLOR -CGC; NICOSULFURON (DPX V9360) -DUQ; PROSULFURON (CGA-152005) -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PE CO2 SPRAYER 0.5 26 41 2 98/05/18 0910 2.2 2.8 11 43 16 2 200 200 POST-E CO2 SPRAYER 0.5 18 40 10 98/06/08 0930 3 11 1.6 22 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PIO 37M) 5 6 25 35 | R-ROOTP-WEED 6 8 3 8 18 | LAMBS QUARTE 8 16 4 10 11 | VELVETLEAF 2 6 2 6 5 | BARNYAGRASS 3 12 5 12 3.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO INJURY IN CORN WITH THE HERBICIDE TREATMENTS EVALUATED. PROSULFURON PLUS DICAMBA AND DICAMBA ALONE (HIGHER RATE) CONSISTENTLY PROVIDED EXCELLENT CONTROL OF THE BROADLEAF WEEDS EVALUATED, INCLUDING LAMB'S-QUARTERS, REDROOT PIGWEED, AND VELVETLEAF. DPX 79406 AND NICOSULFURON BOTH PROVIDED EXCELLENT CONTROL OF GREEN FOXTAIL, ALTHOUGH NUMERICALLY, DPX 79406 PROVIDED SLIGHTLY BETTER CONTROL. THE CONTROL OF GREEN FOXTAIL WITH METOLACHLOR WAS POOR DUE TO LACK OF RAINFALL TO ACTIVATE THE HERBICIDE. (SEE ALSO EXPERIMENT ID:FC98C1B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

43


WEED MANAGEMENT SYSTEMS IN CORN WITH PROSULFURON TANKMIXES ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C1B CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: SANDY LOAM. %OM: 6, %SAND: 55, %SILT: 28, %CLAY: 16, SOIL PH: 7.5. MATERIALS AND METHODS: THE "OTHER" ASSESSMENT IN COLUMN 7 IS THE CORN YIELD IN BU/ACRE. THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS R-ROOT VELVET LADYS GREEN FIELD FIELD T | GROWTH ST INFO# QUARTE P-WEED LEAF THUMB FOXTAI CORN CORN R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0B 0B 0B 0C 0C 6.9B 110B 2 1 METOLACHLOR 1.87 93.5EC 99A 98A 98A 88B 25B 11.4A 182A 2 1 T PROSULFURON 0.01 75WG T DICAMBA 0.14 70WG T AGRAL 90 0.2 OT 3 2 1 T PROSULFURON 0.01 75WG 100A 98A 99A 100A 93A 11.6A 184A T DPX 79406 0.025 25WG T DICAMBA 0.14 70WG T AGRAL 90 0.2 100OT 4 2 1 T DPX 79406 0.025 25WG 99A 99A 99A 98AB 96A 11.6A 185A T DICAMBA 0.288 48SN T AGRAL 90 0.2 100OT 5 2 1 T PROSULFURON 0.01 75WG 98A 100A 95A 100A 93A 12.0A 191A T NICOSULFURON 0.025 75WG T DICAMBA 0.14 70WG T AGRAL 90 0.2 100OT 6 2 1 T NICOSULFURON 0.025 75WG 100A 100A 93A 100A 89A 11.6A 185A T DICAMBA 0.288 48SN T AGRAL 90 0.2 100OT 3 LSD 4.9 LSD 6.4 LSD 10 LSD 18 LSD 0.99LSD 15.8LSD 5% 5% 5% 5% 5% 5% 5% 2 SE 3.2 SE 4.3 SE 6.7 SE 12 SE .65 SE 10.5SE 2.4 CV 3.9 CV 5.3 CV 8.25CV 18.2CV 6.0 CV 6.05CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 12 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980804 980804 980804 980804 980804 981020 981020 LEAF RANGE HEIGHT (CM) 90-185 80-170 40-125 40-70 GROWTH STAGE WEED DENSITY (PL/SQ.M) 11 24 4 3 -----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; DICAMBA -BAZ ( 4:1); DICAMBA -BAZ ( 6:1); DICAMBA -CGC ( 2:2); DICAMBA -CGC ( 5:1); DPX 79406 -DUQ; METOLACHLOR -CGC; NICOSULFURON (DPX V9360) -DUQ; PROSULFURON (CGA-152005) -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PE CO2 SPRAYER 0.5 26 41 2 98/05/18 0910 2.2 2.8 11 43 16 2 200 200 POST-E CO2 SPRAYER 0.5 18 40 10 98/06/08 0930 3 11 1.6 22 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PIO 37M) 5 6 25 35 | R-ROOTP-WEED 6 8 3 8 18 | LAMBS QUARTE 8 16 4 10 11 | VELVETLEAF 2 6 2 6 5 | BARNYAGRASS 3 12 5 12 3.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: PROSULFURON PLUS DICAMBA AND DICAMBA ALONE (HIGHER RATE) CONSISTENTLY PROVIDED EXCELLENT CONTROL OF THE BROADLEAF WEEDS EVALUATED, INCLUDING LAMB'S-QUARTERS, REDROOT PIGWEED, VELVETLEAF, AND LADY'S-THUMB. DPX 79406 AND NICOSULFURON BOTH PROVIDED EXCELLENT CONTROL OF GREEN FOXTAIL, ALTHOUGH NUMERICALLY, DPX 79406 PROVIDED SLIGHTLY BETTER CONTROL. THE CONTROL OF GREEN FOXTAIL WITH METOLACHLOR WAS POOR DUE TO LACK OF RAINFALL TO ACTIVATE THE HERBICIDE. (SEE ALSO EXPERIMENT ID:FC98C1A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

44


WEED MANAGEMENT SYSTEMS IN CORN WITH PRIMISULFURON AND PRIMISULFURON/DICAMBA ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C2 CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 FERT MAINT APPL: 2.0 KG/HA OF DUAL II (HERBICIDE). PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 6 X 8M. PLOT AREA: 48 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: CLAY LOAM. %OM: 6, %SAND: 55, %SILT: 28, %CLAY: 17, SOIL PH: 7.5. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. THE "OTHER" ASSESSMENT IN COLUMN 10 IS CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS R-ROOT VELVET LAMBS R-ROOT VELVET FIELD FIELD T | GROWTH ST INFO# CORN CORN QUARTE P-WEED LEAF QUARTE P-WEED LEAF CORN CORN R | | INCORP INFO# RATE % 37M81 37M81 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0B 0B 0B 0B 0B 0B 7.9B 127B 2 1 1 T PRIMISULFURON 0.025 75WG 0 0 95A 94A 90A 96A 91A 93A 11.2A 178A T DICAMBA 0.14 70WG T AGRAL 90 0.2 100OT 3 1 1 F PRIMISULFURON 0.166 47.4WG 0 0 94A 94A 90A 94A 91A 93A 11.1A 176A F DICAMBA WG T AGRAL 90 0.2 100OT NFS NFS 2.5 LSD 2.5 LSD 0 LSD 7.2 LSD 5.6 LSD 8 LSD .92 LSD 14 LSD 5% 5% 5% 5% 5% 5% 5% 5% 0 SE 0 SE 1.4 SE 1.4 SE 0 SE 4.2 SE 3.2 SE 2.9 SE .53 SE 8 SE 0 CV 0 CV 2.3 CV 2.3 CV 0 CV 6.6 CV 5.3 CV 4.7 CV 5.25CV 5 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 48 48 48 48 48 48 48 48 24 24 NUMBER OF SAMPLES 1 4 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980617 980706 980706 980706 980706 980804 980804 980804 981020 981020 LEAF RANGE 7 -9 14 4 -20 6 -20 4 -9 HEIGHT (CM) 35-50 95-145 20-50 10-65 8-70 60-160 40-135 60-170 GROWTH STAGE WEED DENSITY (PL/SQ.M) 19.5 19.5 13 16.5 6.5 8.5 -----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; DICAMBA -CGC; PRIMISULFURON (CGA-136872) -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 18 40 5 98/06/08 0945 3 11 1.6 22 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PIO 37M) 5 7 30 40 | LAMBS QUARTE 4 16 4 8 15 | VELVETLEAF 6 8 5 10 6.5 | GREEN FOXTAI L.FOLI 2 | R-ROOTP-WEED 4 5 3 5 4.5 | CRAB GRASS 2 12 .5 5 7 | LADYS THUMB 4 6 3 6 2.5 | BARNYAGRASS 3 5 4 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO INJURY IN CORN WITH THE HERBICIDE TREATMENTS EVALUATED. PRIMISULFURON PLUS DICAMBA PROVIDED EXCELLENT CONTROL OF THE BROADLEAF WEEDS EVALUATED, INCLUDING LAMB'S-QUARTERS, REDROOT PIGWEED, AND VELVETLEAF. THERE WAS NO DIFFERENCE IN THE LEVEL OF WEED CONTROL BETWEEN THE TANKMIX AND THE PREMIX EVALUATED. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

45


WEED MANAGEMENT SYSTEMS IN CORN WITH PRIMISULFURON AND PRIMISULFURON/DICAMBA II ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C3 CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/26, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/26 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/26 AT 300 KG/HA PROD WITH 06-24-24 FERT MAINT APPL: 2.0 KG AI/HA OF DUAL II (HERBICIDE). PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 6 X 8M. PLOT AREA: 48 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/06/02. SITE DESCRIPTION: SOIL TEXTURE: LOAMY SAND. %OM: 4, %SAND: 78, %SILT: 15, %CLAY: 6, SOIL PH: 6.4. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS LAMBS R-ROOT T | GROWTH ST INFO# CORN CORN QUARTE QUARTE P-WEED R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0C 0B 0B 2 1 1 T PRIMISULFURON 0.025 75WG 0 0 99A 98A 99A T DICAMBA 0.14 70WG T AGRAL 90 0.2 100OT 3 1 1 F PRIMISULFURON 0.166 47.4WG 0 0 97B 97A 98A F DICAMBA WG T AGRAL 90 0.2 100OT NFS NFS 1.5 LSD 2.4 LSD 1.2 LSD 5% 5% 5% 0 SE 0 SE 0.9 SE 1.4 SE .7 SE 0 CV 0 CV 1.35CV 2.2 CV 1.02CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 48 48 48 48 48 NUMBER OF SAMPLES 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980629 980721 980721 980820 980909 LEAF RANGE 20- 20- 20- HEIGHT (CM) 30-150 20-200 90 GROWTH STAGE WEED DENSITY (PL/SQ.M) 115 112 0.5 -----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; DICAMBA -CGC; PRIMISULFURON (CGA-136872) -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 31 51 3 98/06/19 1430 5 .8 24 11 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PIO 37M) 4 5 15 302 | LAMBS QUARTE 2 10 1 20 257 | LADYS THUMB 4 8 4 6 2.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO INJURY IN CORN WITH THE HERBICIDE TREATMENTS EVALUATED. PRIMISULFURON PLUS DICAMBA AND A PREMIX OF PRIMISULFURON/DICAMBA BOTH PROVIDED EXCELLENT CONTROL OF LAMB'S-QUARTERS. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

46


TOLERANCE OF CORN TO METOLACHLOR APPLIED LATE POSTEMERGENCE ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C4 CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 390 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 390 KG/HA PROD WITH 06-24-24 FERT MAINT APPL: ATRAZINE+BLADEX+BANVEL (HERBICIDE). PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 6, %SAND: 40, %SILT: 37, %CLAY: 21, SOIL PH: 7.6. MATERIALS AND METHODS: ATRAZINE+BLADEX+BANVEL AT 1.08+2.28+0.6 KG AI/HA WAS APPLIED PREEMERGENCE OVER THE ENTIRE TRIAL ON MAY 20 TO MAINTAIN THE TRIAL WEED FREE. THE "OTHER" ASSESSMENT IN COLUMN 7 IS THE CORN YIELD IN BU/ACRE. THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD FIELD FIELD FIELD FIELD FIELD T | GROWTH ST INFO# CORN CORN CORN CORN CORN CORN CORN R | | INCORP INFO# RATE % 37M81 37M81 37M81 37M81 37M81 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL HEIGHT HEIGHT YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 (CM) (CM) T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0B 0 0 88 183 10.0 159 2 1 1 F CGA 77102 1.6 91.5EC 0B 0 0 87 175 9.5 151 F BENOXACOR 4.5EC 3 1 1 F CGA 77102 3.2 91.5EC 0B 0 0 89 181 9.3 148 F BENOXACOR 4.5EC 4 1 1 F CGA 77102 1.6 40SU 0B 0 0 93 185 9.9 157 F ATRAZINE 1.28 32SU F BENOXACOR 2SU 5 1 1 F CGA 77102 3.2 40SU 2A 1 0 89 171 9.0 144 F ATRAZINE 2.56 32SU F BENOXACOR 2SU 6 1 1 T DPX 79406 0.025 25WG 0B 0 0 90 176 9.8 156 T AGRAL 90 0.2 100OT .6 LSD NFS NFS NFS NFS NFS NFS 5% .4 SE .4 SE 0 SE 4.37SE 8.9 SE .66 SE 10.6SE 163 CV 489 CV 0 CV 4.9 CV 5 CV 6.9 CV 6.9 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 12 12 NUMBER OF SAMPLES 1 1 1 10 10 1 1 DATE ASSESSED (YYMMDD) 980617 980630 980716 980630 980716 981020 981020 LEAF RANGE 7 -8 9 -12 HEIGHT (CM) 30-45 55-100 115-190 GROWTH STAGE WEED DENSITY (PL/SQ.M) -----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; ATRAZINE -CGC; BENOXACOR -CGC; CGA 77102 -CGC; DPX 79406 -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 10 67 5 98/06/05 0735 8.8 10 5 25 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PIO 37M) 3 6 10 30 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THIS TRIAL WAS MAINTAINED WEED FREE TO EVALUATE THE TOLERANCE OF CORN TO LATE APPLICATIONS OF METOLACHLOR AND METOLACHLOR/ATRAZINE. THERE WAS NO INJURY OF COMMERCIAL SIGNIFICANCE IN CORN WITH THE LATE APPLICATIONS OF METOLACHLOR AND METOLACHLOR/ATRAZINE EVALUATED. NO INJURY OF COMMERCIAL SIGNIFICANCE WAS OBSERVED IN RESPECT TO VISUAL CROP INJURY, PLANT HEIGHT, AND CROP YIELD. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

47


BROADSPECTRUM WEED CONTROL IN CORN WITH FLUMETSULAM/CLOPYRALID/2,4-D PLUS NICOSULFURON ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C5A CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 7, %SAND: 42, %SILT: 36, %CLAY: 21, SOIL PH: 7.4. MATERIALS AND METHODS: APPLICATION 2 WAS MADE IMMEDIATELY AFTER APPLICATION 1 TO SIMULATE A SPRAY OVERLAP. THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS R-ROOT VELVET GREEN T | GROWTH ST INFO# CORN CORN QUARTE P-WEED LEAF FOXTAI R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0C 0 0D 0D 0D 0F 2 1 1 T NICOSULFURON 0.025 75WG 0C 0 68C 91C 55C 81ABC T AGRAL 90 0.25 100OT 3 1 1 T NICOSULFURON 0.025 75WG 0C 0 78B 99AB 84AB 90AB T AGRAL 90 0.25 100OT 2 1 T NICOSULFURON 0.025 75WG T AGRAL 90 0.25 100OT 4 1 1 T NICOSULFURON 0.025 75WG 0C 0 94A 99AB 97A 90AB T NAF-73 0.236 84.3WG T AGRAL 90 0.25 100OT 5 1 1 T NICOSULFURON 0.025 75WG 1ABC 0 98A 100A 97A 98A T NAF-73 0.236 84.3WG T AGRAL 90 0.25 100OT 2 1 T NICOSULFURON 0.025 75WG T NAF-73 0.236 84.3WG T AGRAL 90 0.25 100OT 6 1 1 T NICOSULFURON 0.025 75WG 0C 0 96A 99AB 99A 90AB T NAF-73 0.236 84.3WG T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 7 1 1 T NICOSULFURON 0.025 75WG 1AB 0 100A 100A 100A 94A T NAF-73 0.236 84.3WG T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 2 1 T NICOSULFURON 0.025 75WG T NAF-73 0.236 84.3WG T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 8 1 1 T NAF-73 0.236 84.3WG 0C 0 98A 99AB 100A 68BCD T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 9 1 1 T NAF-73 0.236 84.3WG 0C 0 98A 100A 100A 78ABC T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 2 1 T NAF-73 0.236 84.3WG T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT10 1 1 F ATRAZINE 0.5 90WG 0C 0 96A 93BC 69BC 28E T AGRAL 90 0.25 100OT11 1 1 T NICOSULFURON 0.025 75WG 0C 0 100A 100A 98A 89AB F DICAMBA 1.48 40.1SU F ATRAZINE SU T AGRAL 90 0.25 100OT12 1 1 F DICAMBA 1.48 40.1SU 0C 0 100A 100A 98A 64CD F ATRAZINE SU13 1 1 T NAF-73 0.236 84.3WG 0C 0 95A 93BC 96A 53D T AGRAL 90 0.25 100OT14 1 1 T NAF-73 0.236 84.3WG 0BC 0 95A 99AB 98A 68BCD T AGRAL 90 0.25 100OT 2 1 T NAF-73 0.236 84.3WG T AGRAL 90 0.25 100OT15 1 1 T DPX 79406 0.025 25WG 2A 0 98A 96ABC 99A 91A T NAF-73 0.236 84.3WG T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 1.0 LSD NFS 9.8 LSD 6.6 LSD 21.5LSD 22.6LSD 5% 5% 5% 5% 5% .7 SE 0 SE 6.8 SE 4.6 SE 15 SE 16 SE 245 CV 0 CV 7.8 CV 5.08CV 17.5CV 22 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980610 980701 980701 980701 980701 980701 LEAF RANGE 5 -6 3 -8 8 -20 8 -20 2 -8 4 - HEIGHT (CM) 20-30 40-110 5-45 15-35 2-30 15-45 WEED DENSITY (PL/SQ.M) 6 5.5 3.5 2

48

-----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; ATRAZINE -BAZ (11:1); ATRAZINE -BAZ (12:1); ATRAZINE -CGC ( 6:1); ATRAZINE -CGC ( 7:1); ATRAZINE -CGC ( 7:2); ATRAZINE -CGC ( 8:1); ATRAZINE -CGC ( 9:1); ATRAZINE -CGC ( 9:2); ATRAZINE -CGC (10:1); ATRAZINE -DWE (15:1); DICAMBA -BAZ; DPX 79406 -DUQ; NAF-73 -DWE; NICOSULFURON (DPX V9360) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 24 19 2 98/06/01 1330 11 3 11 29 16 2 200 200 POST-E CO2 SPRAYER 0.5 24 19 2 98/06/01 1330 11 3 11 29 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PIO 37M) 2 5 5 25 | LAMBS QUARTE 4 2 3 | R-ROOTP-WEED 6 4 1 | VELVETLEAF 6 8 1.5 | GREEN FOXTAI 4 3 2 | E-BLACN-SHAD 4 5 5.5 | BARNYAGRASS 3 7 1 12 2.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO INJURY OF COMMERCIAL SIGNIFICANCE IN CORN WITH THE HERBICIDE TREATMENTS EVALUATED. NICOSULFURON PROVIDED GOOD EARLY SEASON CONTROL OF REDROOT PIGWEED AND GREEN FOXTAIL, BUT HAD MARGINAL ACTIVITY ON LAMB'S-QUARTERS AND VELVETLEAF. NAF-73 PROVIDED EXCELLENT EARLY SEASON CONTROL OF LAMB'S-QUARTERS, PIGWEED, AND VELVETLEAF. THE ADDITION OF ATRAZINE TO NAF-73 MARGINALLY IMPROVED THE BROADLEAF WEED CONTROL. THE TANKMIX OF NAF-73 PLUS NICOSULFURON AND THE TANKMIX OF NAF-73 PLUS ATRAZINE PLUS NICOSULFURON BOTH PROVIDED EXCELLENT BROAD SPECTRUM WEED CONTROL. (SEE ALSO EXPERIMENT ID:FC98C5B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

49


BROADSPECTRUM WEED CONTROL IN CORN WITH FLUMETSULAM/CLOPYRALID/2,4-D PLUS NICOSULFURON ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C5B CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 7, %SAND: 42, %SILT: 36, %CLAY: 21, SOIL PH: 7.4. MATERIALS AND METHODS: APPLICATION 2 WAS MADE IMMEDIATELY AFTER APPLICATION 1 TO SIMULATE A SPRAY OVERLAP. THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. THE "OTHER" ASSESSMENT IN COLUMN 7 IS THE CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS R-ROOT VELVET COMMON GREEN FIELD FIELD T | GROWTH ST INFO# QUARTE P-WEED LEAF RAGWEE FOXTAI CORN CORN R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0E 0D 0C 0C 0C 5.5D 87D 2 1 1 T NICOSULFURON 0.025 75WG 66D 98AB 41B 50B 78A 10.2AB 163AB T AGRAL 90 0.25 100OT 3 1 1 T NICOSULFURON 0.025 75WG 76CD 94AB 56B 60B 85A 9.0BC 144BC T AGRAL 90 0.25 100OT 2 1 T NICOSULFURON 0.025 75WG T AGRAL 90 0.25 100OT 4 1 1 T NICOSULFURON 0.025 75WG 90AB 98AB 93A 98A 90A 9.9AB 157AB T NAF-73 0.236 84.3WG T AGRAL 90 0.25 100OT 5 1 1 T NICOSULFURON 0.025 75WG 94AB 96AB 99A 100A 98A 9.3AB 148AB T NAF-73 0.236 84.3WG T AGRAL 90 0.25 100OT 2 1 T NICOSULFURON 0.025 75WG T NAF-73 0.236 84.3WG T AGRAL 90 0.25 100OT 6 1 1 T NICOSULFURON 0.025 75WG 94A 99A 95A 100A 83A 9.4AB 151AB T NAF-73 0.236 84.3WG T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 7 1 1 T NICOSULFURON 0.025 75WG 100A 100A 100A 100A 90A 9.6AB 152AB T NAF-73 0.236 84.3WG T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 2 1 T NICOSULFURON 0.025 75WG T NAF-73 0.236 84.3WG T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 8 1 1 T NAF-73 0.236 84.3WG 91AB 95AB 100A 100A 16BC 8.9BC 143BC T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 9 1 1 T NAF-73 0.236 84.3WG 94AB 100A 100A 100A 35B 9.3AB 148AB T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 2 1 T NAF-73 0.236 84.3WG T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT10 1 1 F ATRAZINE 0.5 90WG 85BC 71C 51B 100A 0C 7.9C 126C T AGRAL 90 0.25 100OT11 1 1 T NICOSULFURON 0.025 75WG 100A 100A 99A 100A 94A 10.5A 169A F DICAMBA 1.48 40.1SU F ATRAZINE SU T AGRAL 90 0.25 100OT12 1 1 F DICAMBA 1.48 40.1SU 100A 100A 98A 100A 0C 9.4AB 150AB F ATRAZINE SU13 1 1 T NAF-73 0.236 84.3WG 86BC 70C 96A 98A 0C 9.2ABC 147ABC T AGRAL 90 0.25 100OT14 1 1 T NAF-73 0.236 84.3WG 94AB 93AB 99A 100A 0C 8.9BC 143BC T AGRAL 90 0.25 100OT 2 1 T NAF-73 0.236 84.3WG T AGRAL 90 0.25 100OT15 1 1 T DPX 79406 0.025 25WG 99A 89B 96A 95A 93A 10.1AB 161AB T NAF-73 0.236 84.3WG T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 11.6LSD 8.8 LSD 17.5LSD 27.9LSD 22.9LSD 1.4 LSD 22.3LSD 5% 5% 5% 5% 5% 5% 5% 8.1 SE 6.1 SE 12.2SE 19.5SE 16 SE .98 SE 15.6SE 9.6 CV 7.1 CV 15 CV 22.6CV 31.7CV 10.7CV 10.7CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 12 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980728 980728 980728 980728 980728 981019 981019 LEAF RANGE 20- 20- 4 -10 4 -12 HEIGHT (CM) 30-150 70-130 30-120 40-90 WEED DENSITY (PL/SQ.M) 11 14 3 7.5

50

-----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; ATRAZINE -BAZ (11:1); ATRAZINE -BAZ (12:1); ATRAZINE -CGC ( 6:1); ATRAZINE -CGC ( 7:1); ATRAZINE -CGC ( 7:2); ATRAZINE -CGC ( 8:1); ATRAZINE -CGC ( 9:1); ATRAZINE -CGC ( 9:2); ATRAZINE -CGC (10:1); ATRAZINE -DWE (15:1); DICAMBA -BAZ; DPX 79406 -DUQ; NAF-73 -DWE; NICOSULFURON (DPX V9360) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 24 19 2 98/06/01 1330 11 3 11 29 16 2 200 200 POST-E CO2 SPRAYER 0.5 24 19 2 98/06/01 1330 11 3 11 29 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PIO 37M) 2 5 5 25 | LAMBS QUARTE 4 2 3 | R-ROOTP-WEED 6 4 1 | VELVETLEAF 6 8 1.5 | GREEN FOXTAI 4 3 2 | E-BLACN-SHAD 4 5 5.5 | BARNYAGRASS 3 7 1 12 2.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: NICOSULFURON PROVIDED EXCELLENT FULL SEASON CONTROL OF REDROOT PIGWEED AND FAIR CONTROL OF GREEN FOXTAIL, BUT HAD POOR ACTIVITY ON LAMB'S-QUARTERS, COMMON RAGWEED, AND VELVETLEAF. NAF-73 PROVIDED EXCELLENT FULL SEASON CONTROL OF VELVETLEAF AND RAGWEED, GOOD CONTROL OF LAMB'S-QUARTERS, AND FAIR CONTROL OF PIGWEED. NAF-73 PLUS ATRAZINE PROVIDED EXCELLENT FULL SEASON BROADLEAF WEED CONTROL. THE TANKMIX OF NAF-73 PLUS NICOSULFURON, AND THE TANKMIX OF NAF-73 PLUS ATRAZINE PLUS NICOSULFURON, BOTH PROVIDED EXCELLENT BROAD SPECTRUM WEED CONTROL. THE TANKMIXES OF DICAMBA/ATRAZINE PLUS NICOSULFURON AND DPX 79406 PLUS NAF-73 PLUS ATRAZINE ALSO PROVIDED EXCELLENT FULL SEASON WEED CONTROL. (SEE ALSO EXPERIMENT ID:FC98C5A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

51


WEED MANAGEMENT SYSTEMS IN CORN WITH PRIMISULFURON PLUS DICAMBA TANKMIXES ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C6 CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 FERT MAINT APPL: 2.0 KG AI/HA OF DUAL II (HERBICIDE). PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 6, %SAND: 44, %SILT: 33, %CLAY: 22, SOIL PH: 7.6. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS R-ROOT VELVET LADYS LAMBS R-ROOT VELVET LADYS FIELD T | GROWTH ST INFO# CORN CORN QUARTE P-WEED LEAF THUMB QUARTE P-WEED LEAF THUMB CORN R | | INCORP INFO# RATE % 37M81 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL YIELD # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 T/HA ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0D 0D 0D 0B 0C 0D 0C 0C 7.1C 2 1 1 T PRIMISULFURON 0.025 75WG 0 0 78BC 69C 53C 100A 76B 70C 18C 90AB 8.7B T AGRAL 90 0.2 100OT 3 1 1 DICAMBA 0.14 70WG 0 0 63C 63C 54C 100A 74B 76C 70B 100A 8.8B 4 1 1 DICAMBA 0.288 70WG 0 0 86AB 88AB 66BC 96A 91A 95AB 75AB 98AB 9.9AB 5 1 1 T PRIMISULFURON 0.025 75WG 0 0 99A 91AB 80AB 100A 98A 86B 79AB 99A 9.7AB T DICAMBA 0.14 70WG T AGRAL 90 0.2 100OT 6 1 1 T PRIMISULFURON 0.025 75WG 0 0 100A 89AB 68ABC 98A 100A 99A 75AB 89AB 10.3A T DICAMBA 0.288 70WG T AGRAL 90 0.2 100OT 7 1 1 T PRIMISULFURON 0.025 75WG 0 0 99A 91AB 86A 98A 99A 89B 88AB 93AB 9.6AB T DICAMBA 0.14 48SN T AGRAL 90 0.2 100OT 8 1 1 T PRIMISULFURON 0.025 75WG 0 0 98A 97A 86A 100A 97A 98A 91A 100A 10.6A T DICAMBA 0.288 48SN T AGRAL 90 0.2 100OT 9 1 1 F PRIMISULFURON 0.166 47.4WG 0 0 99A 83B 68ABC 88A 100A 93AB 76AB 85B 10.5A F DICAMBA WG T AGRAL 90 0.2 100OT NFS NFS 19 LSD 11.9LSD 19.5LSD 13.4LSD 12 LSD 9.2 LSD 20 LSD 13.5LSD 1.27LSD 5% 5% 5% 5% 5% 5% 5% 5% 5% 0 SE 0 SE 13 SE 8.2 SE 13.3SE 9.2 SE 8 SE 6.3 SE 14 SE 9 SE .87 SE 0 CV 0 CV 16.4CV 11 CV 21.5CV 10.6CV 10 CV 8.05CV 22 CV 11 CV 9.2 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 16 16 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980617 980706 980706 980706 980706 980706 980804 980804 980804 980804 981020 LEAF RANGE 7 -8 13 6 -20 2 -20 1 -7 4 -20 HEIGHT (CM) 30-45 120 10-70 3-80 1-55 8-15 70-160 40-140 10-120 40 GROWTH STAGE WEED DENSITY (PL/SQ.M) 4.5 14 4.5 1.5 3 11 1 1 -----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; DICAMBA -BAZ ( 7:1); DICAMBA -BAZ ( 8:1); DICAMBA -CGC ( 3:1); DICAMBA -CGC ( 9:1); PRIMISULFURON (CGA-136872) -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 10 67 0 98/06/05 0720 8.8 10 5 25 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PIO 37M) 3 6 12 25 | LAMBS QUARTE 6 7 3 4 1 | VELVETLEAF 2 7 2 6 2 | R-ROOTP-WEED 5 6 3 5 3.5 | GREEN FOXTAI 3 4 5 10 1 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO INJURY IN CORN WITH THE HERBICIDE TREATMENTS EVALUATED. PRIMISULFURON PROVIDED EXCELLENT CONTROL OF LADY'S THUMB, FAIR CONTROL OF LAMB'S-QUARTERS AND PIGWEED, AND POOR CONTROL OF VELVETLEAF. THE TANKMIX OF PRIMISULFURON PLUS DICAMBA AND THE PREMIX OF PRIMISULFURON/DICAMBA PROVIDED EXCELLENT CONTROL OF LAMB'S-QUARTERS AND LADY'S THUMB, AND GOOD CONTROL OF PIGWEED AND VELVETLEAF. THERE WAS NO DIFFERENCE BETWEEN THE WG AND SN FORMULATIONS OF DICAMBA. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

52


BROADLEAF WEED CONTROL IN CORN WITH ATRAZINE/2,4-D ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C7A CROP: CORN, FIELD (DK493RR). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (DK493RR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 5, %SAND: 41, %SILT: 37, %CLAY: 20, SOIL PH: 7.3. MATERIALS AND METHODS: THE RATE OF ACTIVATOR 90 WAS % V/V, NOT KG AI/HA. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS R-ROOT VELVET LADYS BARNYA GREEN T | GROWTH ST INFO# CORN CORN QUARTE P-WEED LEAF THUMB GRASS FOXTAI R | | INCORP INFO# RATE % DK493R DK493R T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0D 0C 0E 0C 0C 0D 2 1 1 F ATRAZINE 1.404 39SU 0 0 100A 100A 19DE 74AB 80AB 73AB F 2,4-D ESTER SU 3 1 1 T RIMSULFURON 0.015 25WG 0 0 55C 100A 0E 90AB 75AB 70AB T ACTIVATOR 90 0.2 100OT 4 1 1 PENDIMETHALIN 1.68 40EC 0 0 100A 45B 44CD 73AB 59B 58BC 5 1 1 F ATRAZINE 1.404 39SU 0 0 100A 98A 33CDE 98A 93A 89AB F 2,4-D ESTER SU T RIMSULFURON 0.015 25WG T ACTIVATOR 90 0.2 100OT 6 1 1 F ATRAZINE 1.404 39SU 0 0 100A 100A 56BC 98A 98A 74AB F 2,4-D ESTER SU T PENDIMETHALIN 1.68 40EC 7 1 1 F ATRAZINE 1.404 39SU 0 0 100A 100A 82AB 95A 88AB 90AB F 2,4-D ESTER SU T RIMSULFURON 0.013 25WG T PENDIMETHALIN 1.0 40EC T ACTIVATOR 90 0.2 100OT 8 2 2 F ATRAZINE 1.404 39SU 0 0 100A 100A 80AB 98A 60B 31CD F 2,4-D ESTER SU 9 2 2 T DPX 79406 0.025 25WG 0 0 75B 100A 60ABC 98A 93A 93A T ACTIVATOR 90 0.2 100OT10 2 2 T NICOSULFURON 0.025 75WG 0 0 0D 100A 0E 60B 95A 93A T ACTIVATOR 90 0.2 100OT11 2 2 F ATRAZINE 1.404 39SU 0 0 100A 100A 93A 98A 100A 93A F 2,4-D ESTER SU T DPX 79406 0.025 25WG T ACTIVATOR 90 0.2 100OT12 2 2 F ATRAZINE 1.404 39SU 0 0 100A 100A 87AB 98A 94A 86AB F 2,4-D ESTER SU T NICOSULFURON 0.025 75WG T ACTIVATOR 90 0.2 100OT NFS NFS 15.9LSD 22.1LSD 34.6LSD 34.5LSD 30.8LSD 32.7LSD 5% 5% 5% 5% 5% 5% 0 SE 0 SE 11 SE 15 SE 23.9SE 23.9SE 21 SE 22.6SE 0 CV 0 CV 14.2CV 17.6CV 52 CV 29 CV 27.5CV 32 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980610 980701 980701 980701 980701 980701 980701 980701 LEAF RANGE 5 -7 11-12 8 -20 4 -20 4 -8 20- 4 -20 HEIGHT (CM) 20-30 70 10-40 5-35 3-15 10-25 15-50 GROWTH STAGE WEED DENSITY (PL/SQ.M) 6.5 3.5 3.5 2.5 5.5 -----------------------------------------------------------------------------------------------------------------------------------2,4-D ESTER -UAP; ACTIVATOR 90 -UAP; ATRAZINE -UAP; DPX 79406 -DUQ; NICOSULFURON (DPX V9360) -DUQ; PENDIMETHALIN -CYC; RIMSULFURON (DPX-E-9636) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 22 31 6 98/05/23 1200 0 4.8 12 38 16 2 200 200 POST-E CO2 SPRAYER 0.5 10 73 0 98/06/03 0645 8.8 3 12 27 16

53

------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (DK493RR) 1 2 5 8 | 2 FIELD CORN (DK493RR) 3 5 10 20 | COMMONRAGWEE 6 5 1 | LAMBS QUARTE 6 7 2 8 3 | R-ROOTP-WEED 4 6 5 1.5 | VELVETLEAF 4 5 5 1 | BARNYAGRASS 2 4 2 8 4.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO INJURY IN CORN WITH THE HERBICIDE TREATMENTS EVALUATED. ATRAZINE/2,4-D PROVIDED EXCELLENT EARLY SEASON CONTROL OF LAMB'S-QUARTERS AND PIGWEED. THE CONTROL OF VELVETLEAF AND LADY'S THUMB IMPROVED WHEN THE APPLICATION WAS DELAYED TO THE 4 LEAF STAGE OF THE CORN. THE TANKMIXES OF ATRAZINE/2,4-D PLUS RIMSULFURON OR PENDIMETHALIN PROVIDED EXCELLENT WEED CONTROL WITH THE EXCEPTION OF VELVETLEAF. THE TANKMIXES OF ATRAZINE/2,4-D PLUS DPX 79406 OR NICOSULFURON, BOTH PROVIDED EXCELLENT BROAD SPECTRUM EARLY SEASON WEED CONTROL. (SEE ALSO EXPERIMENT ID:FC98C7B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

54


BROADLEAF WEED CONTROL IN CORN WITH ATRAZINE/2,4-D ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C7B CROP: CORN, FIELD (DK493RR). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (DK493RR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 5, %SAND: 41, %SILT: 37, %CLAY: 20, SOIL PH: 7.3. MATERIALS AND METHODS: THE RATE OF ACTIVATOR 90 WAS % V/V, NOT KG AI/HA. THE "OTHER" ASSESSMENT IN COLUMN 8 WAS CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS R-ROOT VELVET COMMON BARNYA GREEN FIELD FIELD T | GROWTH ST INFO# QUARTE P-WEED LEAF RAGWEE GRASS FOXTAI CORN CORN R | | INCORP INFO# RATE % DK493R DK493R T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0D 0D 0F 0C 0C 0C 5.8F 91F 2 1 1 F ATRAZINE 1.404 39SU 94A 88BC 30CDE 73AB 79AB 63AB 7.3DE 116DE F 2,4-D ESTER SU 3 1 1 T RIMSULFURON 0.015 25WG 70B 100A 25DEF 50ABC 85AB 61AB 7.6CDE 121CDE T ACTIVATOR 90 0.2 100OT 4 1 1 PENDIMETHALIN 1.68 40EC 86A 79C 30CDE 50ABC 80AB 55AB 6.9EF 109EF 5 1 1 F ATRAZINE 1.404 39SU 98A 98AB 45A-D 98A 86AB 95A 7.8B-E 125B-E F 2,4-D ESTER SU T RIMSULFURON 0.015 25WG T ACTIVATOR 90 0.2 100OT 6 1 1 F ATRAZINE 1.404 39SU 98A 93AB 41B-E 43BC 100A 55AB 8.7ABC 138ABC F 2,4-D ESTER SU T PENDIMETHALIN 1.68 40EC 7 1 1 F ATRAZINE 1.404 39SU 100A 95AB 56ABC 100A 95A 90A 8.2A-D 131A-D F 2,4-D ESTER SU T RIMSULFURON 0.013 25WG T PENDIMETHALIN 1.0 40EC T ACTIVATOR 90 0.2 100OT 8 2 2 F ATRAZINE 1.404 39SU 98A 98AB 51A-D 70AB 68B 43B 8.1A-D 130A-D F 2,4-D ESTER SU 9 2 2 T DPX 79406 0.025 25WG 69B 100A 43BCD 50ABC 91AB 89A 8.0A-E 127A-E T ACTIVATOR 90 0.2 100OT10 2 2 T NICOSULFURON 0.025 75WG 38C 98AB 13EF 0C 88AB 81AB 6.9EF 110E T ACTIVATOR 90 0.2 100OT11 2 2 F ATRAZINE 1.404 39SU 100A 100A 73A 100A 95A 93A 8.8AB 140AB F 2,4-D ESTER SU T DPX 79406 0.025 25WG T ACTIVATOR 90 0.2 100OT12 2 2 F ATRAZINE 1.404 39SU 95A 98AB 69AB 100A 93AB 79AB 9.0A 143A F 2,4-D ESTER SU T NICOSULFURON 0.025 75WG T ACTIVATOR 90 0.2 100OT 15.1LSD 11.5LSD 29.9LSD 54.8LSD 25.1LSD 40.7LSD 1.14LSD 18.1LSD 5% 5% 5% 5% 5% 5% 5% 5% 10 SE 8 SE 20.7SE 37.9SE 17 SE 28 SE .79 SE 12.5SE 13.3CV 9.2 CV 52.3CV 62 CV 21.8CV 42.2CV 10.2CV 10.1CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 12 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980728 980728 980728 980728 980728 980728 981021 981021 LEAF RANGE 4 -20 5 -20 4 -8 20- 10- HEIGHT (CM) 40-165 20-110 4-60 70 30-40 GROWTH STAGE WEED DENSITY (PL/SQ.M) 7.5 9.5 5.5 0.5 2 -----------------------------------------------------------------------------------------------------------------------------------2,4-D ESTER -UAP; ACTIVATOR 90 -UAP; ATRAZINE -UAP; DPX 79406 -DUQ; NICOSULFURON (DPX V9360) -DUQ; PENDIMETHALIN -CYC; RIMSULFURON (DPX-E-9636) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 22 31 6 98/05/23 1200 0 4.8 12 38 16 2 200 200 POST-E CO2 SPRAYER 0.5 10 73 0 98/06/03 0645 8.8 3 12 27 16

55

------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (DK493RR) 1 2 5 8 | 2 FIELD CORN (DK493RR) 3 5 10 20 | COMMONRAGWEE 6 5 1 | LAMBS QUARTE 6 7 2 8 3 | R-ROOTP-WEED 4 6 5 1.5 | VELVETLEAF 4 5 5 1 | BARNYAGRASS 2 4 2 8 4.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: ATRAZINE/2,4-D PROVIDED EXCELLENT FULL SEASON CONTROL OF LAMB'S-QUARTERS AND PIGWEED, FAIR CONTROL OF RAGWEED, AND POOR CONTROL OF VELVETLEAF. THE TANKMIX OF ATRAZINE/2,4-D PLUS RIMSULFURON PROVIDED GOOD WEED CONTROL, WITH THE EXCEPTION OF VELVETLEAF. THE TANKMIX OF ATRAZINE/2,4-D PLUS PENDIMETHALIN WAS WEAK ON VELVETLEAF, RAGWEED AND GREEN FOXTAIL. THE THREE-WAY TANKMIX OF ATRAZINE/2,4-D PLUS RIMSULFURON PLUS PENDIMETHALIN PROVIDED EXCELLENT CONTROL, WITH THE EXCEPTION OF VELVETLEAF. THE TANKMIXES OF ATRAZINE/2,4-D PLUS DPX 79406 OR NICOSULFURON BOTH PROVIDED EXCELLENT FULL SEASON WEED CONTROL, WITH THE EXCEPTION OF VELVETLEAF. DPX 79406 PROVIDED BETTER CONTROL OF GREEN FOXTAIL THAN NICOSULFURON. (SEE ALSO EXPERIMENT ID:FC98C7A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

56


WEED CONTROL IN CORN WITH NICOSULFURON TANKMIXES ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C10A CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/13, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: WHEAT, WINTER (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 6M. PLOT AREA: 12 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/19.SITE DESCRIPTION: SOIL TEXTURE: SILT LOAM. %OM: 6, %SAND: 45, %SILT: 37, %CLAY: 18, SOIL PH: 6.4. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA.------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS VELVET LADYS COMMON GREEN T | GROWTH ST INFO# CORN CORN QUARTE LEAF THUMB RAGWEE FOXTAI R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0C 0 0C 0C 0C 0C 0B 2 1 1 T NICOSULFURON 0.025 75WG 0C 0 4C 4C 0C 0C 100A T AGRAL 90 0.25 100OT 3 1 1 BROMOXYNIL 0.28 28EC 2B 0 61B 55B 15C 40B 0B 4 1 1 F DICAMBA 1 40.1SU 0C 0 94A 78A 100A 100A 0B F ATRAZINE SU 5 1 1 T NICOSULFURON 0.025 75WG 10A 0 69B 71AB 70B 68AB 100A T BROMOXYNIL 0.28 28EC T AGRAL 90 0.25 100OT 6 1 1 T NICOSULFURON 0.025 75WG 10A 0 100A 78A 95A 81A 99A T BROMOXYNIL 0.28 28EC T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 7 1 1 T NICOSULFURON 0.025 75WG 0C 0 99A 84A 90AB 100A 98A F DICAMBA 1 40.1SU F ATRAZINE SU T AGRAL 90 0.25 100OT 0 LSD NFS 9.3 LSD 21.5LSD 23.7LSD 34.4LSD 3 LSD 5% 5% 5% 5% 5% 5% 0 SE 0 SE 6.3 SE 14.5SE 16 SE 23 SE 2 SE 0 CV 0 CV 10.3CV 27.5CV 30 CV 41.8CV 3.5 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 12 12 12 12 12 12 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980610 980629 980629 980629 980629 980629 980629 LEAF RANGE 7 10-12 20- 6 -12 20- 20- HEIGHT (CM) 30-35 50-65 25-120 30-75 30-55 20-85 GROWTH STAGE WEED DENSITY (PL/SQ.M) 35 9.5 2.5 4.5 -----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; ATRAZINE -BAZ ( 4:1); ATRAZINE -BAZ ( 7:1); ATRAZINE -CGC ( 6:1); BROMOXYNIL -RPC; DICAMBA -BAZ; NICOSULFURON (DPX V9360) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 24 20 5 98/06/01 1145 11 3 11 29 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PIO 37M) 5 7 25 30 | R-ROOTP-WEED 12 14 8 14 7 | LAMBS QUARTE 6 20 3 18 45 | LADYS THUMB 8 20 8 12 19 | CHICK WEED 6 20 2 4 8.5 | VELVETLEAF 6 10 3 15 24 | YELLOWFOXTAI 3 6 8 4 | COMMONRAGWEE 6 8 10 2 | E-BLACN-SHAD 6 3 5 3.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: NICOSULFURON PLUS BROMOXYNIL RESULTED IN SIGNIFICANT CROP INJURY SHORTLY AFTER APPLICATION, BUT THE CROP RECOVERED QUICKLY. NICOSULFURON PROVIDED EXCELLENT EARLY SEASON CONTROL OF GREEN FOXTAIL, BUT HAD NO ACTIVITY ON THE BROADLEAF WEEDS IN THIS TRIAL. BROMOXYNIL PROVIDED POOR EARLY SEASON CONTROL OF LAMB'S-QUARTERS, VELVETLEAF, LADY'S THUMB, AND RAGWEED. DICAMBA/ATRAZINE PROVIDED EXCELLENT CONTROL OF LAMB'S-QUARTERS, LADY'S THUMB, AND RAGWEED, AND GOOD CONTROL OF VELVETLEAF. THE TANKMIX OF NICOSULFURON PLUS BROMOXYNIL PROVIDED ONLY MARGINAL BROADLEAF WEED CONTROL. THE ADDITION OF ATRAZINE IMPROVED THE CONTROL CONSIDERABLY. THE TANKMIX WITH DICAMBA/ATRAZINE PROVIDED EXCELLENT BROAD SPECTRUM CONTROL. (SEE ALSO EXPERIMENT ID:FC98C10B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

57


WEED CONTROL IN CORN WITH NICOSULFURON TANKMIXES ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C10B CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/13, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: WHEAT, WINTER (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 6M. PLOT AREA: 12 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/19. SITE DESCRIPTION: SOIL TEXTURE: SILT LOAM. %OM: 6, %SAND: 45, %SILT: 37, %CLAY: 18, SOIL PH: 6.4. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. THE "OTHER" ASSESSMENT IN COLUMN 7 IS CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS VELVET LADYS COMMON GREEN FIELD FIELD T | GROWTH ST INFO# QUARTE LEAF THUMB RAGWEE FOXTAI CORN CORN R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0D 0D 0D 0C 0C 3.9D 62D 2 1 1 T NICOSULFURON 0.025 75WG 0D 25CD 45BC 0C 100A 7.3C 117C T AGRAL 90 0.25 100OT 3 1 1 BROMOXYNIL 0.28 28EC 56C 59AB 13CD 65AB 0C 11.2B 178B 4 1 1 F DICAMBA 1 40.1SU 100A 84A 95A 100A 0C 13.3A 211A F ATRAZINE SU 5 1 1 T NICOSULFURON 0.025 75WG 68B 50BC 48B 38BC 95A 13.0A 208A T BROMOXYNIL 0.28 28EC T AGRAL 90 0.25 100OT 6 1 1 T NICOSULFURON 0.025 75WG 98A 66AB 90A 65AB 94AB 13.8A 220A T BROMOXYNIL 0.28 28EC T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 7 1 1 T NICOSULFURON 0.025 75WG 100A 85A 83A 100A 86B 13.8A 219A F DICAMBA 1 40.1SU F ATRAZINE SU T AGRAL 90 0.25 100OT 9.6 LSD 30 LSD 34.7LSD 39 LSD 7.8 LSD 1.29LSD 20.6LSD 5% 5% 5% 5% 5% 5% 5% 6.5 SE 20 SE 23 SE 26 SE 5.3 SE .87 SE 13.9SE 10.8CV 38 CV 44 CV 50 CV 9.9 CV 8 CV 8 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 12 12 12 12 12 9 9 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980727 980727 980727 980727 980727 981019 981019 LEAF RANGE 6 -20 4 -10 20- 20- 5 -12 HEIGHT (CM) 25-200 60-120 20-60 50-150 7-130 GROWTH STAGE WEED DENSITY (PL/SQ.M) 21 1 5 1 5.5 -----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; ATRAZINE -BAZ ( 4:1); ATRAZINE -BAZ ( 7:1); ATRAZINE -CGC ( 6:1); BROMOXYNIL -RPC; DICAMBA -BAZ; NICOSULFURON (DPX V9360) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 24 20 5 98/06/01 1145 11 3 11 29 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PIO 37M) 5 7 25 30 | R-ROOTP-WEED 12 14 8 14 7 | LAMBS QUARTE 6 20 3 18 45 | LADYS THUMB 8 20 8 12 19 | CHICK WEED 6 20 2 4 8.5 | VELVETLEAF 6 10 3 15 24 | YELLOWFOXTAI 3 6 8 4 | COMMONRAGWEE 6 8 10 2 | E-BLACN-SHAD 6 3 5 3.5 |------------------------------------------------------------------------------------------------------------------------------------CONCLUSIONS: NICOSULFURON PROVIDED EXCELLENT FULL SEASON CONTROL OF GREEN FOXTAIL, BUT HAD LITTLE TO NO ACTIVITY ON THE BROADLEAF WEEDS IN THIS TRIAL. BROMOXYNIL PROVIDED POOR CONTROL OF LAMB'S-QUARTERS, VELVETLEAF, LADY'S THUMB AND RAGWEED. DICAMBA/ATRAZINE PROVIDED EXCELLENT CONTROL OF LAMB'S-QUARTERS, LADY'S THUMB AND RAGWEED AND GOOD CONTROL OF VELVETLEAF. THE TANKMIX OF NICOSULFURON PLUS BROMOXYNIL PROVIDED EXCELLENT ANNUAL GRASS CONTROL, BUT ONLY MARGINAL BROADLEAF WEED CONTROL. THE ADDITION OF ATRAZINE IMPROVED THE CONTROL OF LAMB'S-QUARTERS AND LADY'S THUMB, BUT THE CONTROL OF VELVETLEAF AND RAGWEED WAS STILL POOR. THE TANKMIX WITH DICAMBA/ATRAZINE PROVIDED GOOD TO EXCELLENT BROAD SPECTRUM CONTROL. (SEE ALSO EXPERIMENT ID:FC98C10A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

58


WEED CONTROL IN CORN WITH NICOSULFURON TANKMIXES II ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C11A CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/13, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: WHEAT, WINTER (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 6M. PLOT AREA: 12 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/19. SITE DESCRIPTION: SOIL TEXTURE: CLAY LOAM. %OM: 6, %SAND: 44, %SILT: 37, %CLAY: 18, SOIL PH: 6.4. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS R-ROOT VELVET LADYS COMMON GREEN T | GROWTH ST INFO# CORN CORN QUARTE P-WEED LEAF THUMB RAGWEE FOXTAI R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0C 0 0E 0D 0C 0C 0D 0C 2 1 1 T NICOSULFURON 0.025 75WG 0C 0 8D 80B 30BC 48B 0D 100A T AGRAL 90 0.25 100OT 3 1 1 T BROMOXYNIL 0.28 28EC 2B 0 81B 49C 68AB 79A 43C 0C 1 1 T ATRAZINE 0.5 90WG 4 1 1 F DICAMBA 1 40.1SU 0C 0 94A 84AB 78A 98A 98A 0C F ATRAZINE SU 5 1 1 T NICOSULFURON 0.025 75WG 10A 0 64C 88AB 41AB 93A 50BC 100A T BROMOXYNIL 0.28 28EC T AGRAL 90 0.25 100OT 6 1 1 T NICOSULFURON 0.025 75WG 10A 0 95A 83AB 55AB 95A 90AB 94B T BROMOXYNIL 0.28 28EC T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 7 1 1 T NICOSULFURON 0.025 75WG 0C 0 100A 94A 75A 98A 96A 100A F DICAMBA 1 40.1SU F ATRAZINE SU T AGRAL 90 0.25 100OT 0.6 LSD NFS 7.4 LSD 12.3LSD 38 LSD 27.9LSD 40.5LSD 2.7 LSD 5% 5% 5% 5% 5% 5% 5% 0.4 SE 0 SE 5 SE 8.3 SE 25.6SE 18.8SE 27 SE 1.8 SE 12.3CV 0 CV 7.9 CV 12 CV 51.7CV 25.9CV 50.6CV 3.2 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 12 12 12 12 12 12 12 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980610 980629 980629 980629 980629 980629 980629 980629 LEAF RANGE 7 10-12 8 -20 10-20 4 -14 8 -20 20- 5 -6 HEIGHT (CM) 30-35 100-150 20-130 25-100 35-100 10-35 60-75 30-60 GROWTH STAGE WEED DENSITY (PL/SQ.M) 48 28 8 3 2.5 1.5 -----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; ATRAZINE -BAZ ( 4:1); ATRAZINE -BAZ ( 7:1); ATRAZINE -CGC ( 3:1); ATRAZINE -CGC ( 6:1); BROMOXYNIL -RPC; DICAMBA -BAZ; NICOSULFURON (DPX V9360) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 24 20 2 98/06/01 1130 11 3 11 29 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (37M81 ) 4 7 25 30 | R-ROOTP-WEED 7 20 10 20 63.5 | LAMBS QUARTE 14 20 8 23 45.5 | COMMONRAGWEE 8 14 15 20 2 | E-BLACN-SHAD 6 8 1.5 | CHICK WEED 10 20 4 6 12.5 | VELVETLEAF 6 8 20 30 4 | LADYS THUMB 5 12 5 12 4.5 |------------------------------------------------------------------------------------------------------------------------------------CONCLUSIONS: NICOSULFURON PLUS BROMOXYNIL RESULTED IN SIGNIFICANT CROP INJURY SHORTLY AFTER APPLICATION, BUT THE CROP RECOVERED QUICKLY. NICOSULFURON PROVIDED EXCELLENT EARLY SEASON CONTROL OF GREEN FOXTAIL, GOOD CONTROL OF REDROOT PIGWEED, AND POOR CONTROL OF LAMB'S-QUARTERS, VELVETLEAF, LADY'S THUMB, AND RAGWEED. THE TANKMIX OF NICOSULFURON PLUS BROMOXYNIL WAS WEAK ON LAMB'S-QUARTERS, VELVETLEAF AND RAGWEED. THE ADDITION OF ATRAZINE IMPROVED THE CONTROL CONSIDERABLY, WITH THE EXCEPTION OF VELVETLEAF. THE TANKMIX WITH DICAMBA/ATRAZINE PROVIDED EXCELLENT BROAD SPECTRUM CONTROL EXCEPT FOR VELVETLEAF WHICH HAD ONLY FAIR CONTROL. (SEE ALSO EXPERIMENT ID:FC98C11B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

59


WEED CONTROL IN CORN WITH NICOSULFURON TANKMIXES II ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98C11B CROP: CORN, FIELD (PIO 37M81). PLANTED: 98/05/13, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/04/29 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: WHEAT, WINTER (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 6M. PLOT AREA: 12 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PIO 37M81) EMERGED ON: 98/05/19. SITE DESCRIPTION: SOIL TEXTURE: CLAY LOAM. %OM: 6, %SAND: 44, %SILT: 37, %CLAY: 18, SOIL PH: 6.4. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. THE "OTHER" ASSESSMENT IN COLUMN 8 IS CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS R-ROOT VELVET LADYS COMMON GREEN FIELD FIELD T | GROWTH ST INFO# QUARTE P-WEED LEAF THUMB RAGWEE FOXTAI CORN CORN R | | INCORP INFO# RATE % 37M81 37M81 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0D 0D 0C 0C 0C 0D 4.3D 69D 2 1 1 T NICOSULFURON 0.025 75WG 0D 95A 0C 43BC 20BC 98AB 10.1C 161C T AGRAL 90 0.25 100OT 3 1 1 T BROMOXYNIL 0.28 28EC 93AB 50C 73AB 63AB 49ABC 0D 13.1B 210B 1 1 T ATRAZINE 0.5 90WG 4 1 1 F DICAMBA 1 40.1SU 94AB 91A 85A 100A 100A 0D 13.9AB 221AB F ATRAZINE SU 5 1 1 T NICOSULFURON 0.025 75WG 61C 85AB 0C 90A 50ABC 99A 13.5B 216B T BROMOXYNIL 0.28 28EC T AGRAL 90 0.25 100OT 6 1 1 T NICOSULFURON 0.025 75WG 90B 79B 58B 80AB 73AB 80C 14.1AB 226AB T BROMOXYNIL 0.28 28EC T ATRAZINE 0.5 90WG T AGRAL 90 0.25 100OT 7 1 1 T NICOSULFURON 0.025 75WG 100A 79B 76AB 85AB 100A 89BC 14.8A 235A F DICAMBA 1 40.1SU F ATRAZINE SU T AGRAL 90 0.25 100OT 9 LSD 12.3LSD 21.8LSD 43.4LSD 52.8LSD 9.4 LSD 1.17LSD 18.5LSD 5% 5% 5% 5% 5% 5% 5% 5% 6.1 SE 8.2 SE 15 SE 29 SE 35.5SE 6.3 SE .79 SE 12.5SE 9.7 CV 12.1CV 35.2CV 44.5CV 63.6CV 12.1CV 6.57CV 6.5 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 12 12 12 12 12 12 9 9 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980727 980727 980727 980727 980727 980727 981019 981019 LEAF RANGE 20- 20- 8 -10 20- 20- 8 -10 HEIGHT (CM) 90-190 60-150 25-120 75 70-150 75-100 GROWTH STAGE WEED DENSITY (PL/SQ.M) 37 16 3 0.5 1 1 -----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; ATRAZINE -BAZ ( 4:1); ATRAZINE -BAZ ( 7:1); ATRAZINE -CGC ( 3:1); ATRAZINE -CGC ( 6:1); BROMOXYNIL -RPC; DICAMBA -BAZ; NICOSULFURON (DPX V9360) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 24 20 2 98/06/01 1130 11 3 11 29 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (37M81 ) 4 7 25 30 | R-ROOTP-WEED 7 20 10 20 63.5 | LAMBS QUARTE 14 20 8 23 45.5 | COMMONRAGWEE 8 14 15 20 2 | E-BLACN-SHAD 6 8 1.5 | CHICK WEED 10 20 4 6 12.5 | VELVETLEAF 6 8 20 30 4 | LADYS THUMB 5 12 5 12 4.5 |------------------------------------------------------------------------------------------------------------------------------------CONCLUSIONS: NICOSULFURON PROVIDED EXCELLENT FULL SEASON CONTROL OF GREEN FOXTAIL AND REDROOT PIGWEED, BUT HAD LITTLE TO NO ACTIVITY ON THE REMAINING BROADLEAF WEEDS IN THIS TRIAL. THE TANKMIX OF NICOSULFURON PLUS BROMOXYNIL WAS WEAK ON LAMB'S-QUARTERS, VELVETLEAF AND RAGWEED. THE ADDITION OF ATRAZINE IMPROVED THE CONTROL OF LAMB'S-QUARTERS, VELVETLEAF, AND RAGWEED, BUT THE CONTROL OF GREEN FOXTAIL WAS REDUCED, INDICATING POSSIBLE ANTAGONISM BETWEEN NICOSULFURON AND ATRAZINE IN RESPECT TO FOXTAIL CONTROL. THE TANKMIX WITH DICAMBA/ATRAZINE PROVIDED GOOD TO EXCELLENT BROAD SPECTRUM CONTROL. (SEE ALSO EXPERIMENT ID:FC98C11A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

60


BROADSPECTRUM WEED CONTROL IN SMART CORN WITH IMAZETHAPYR/ATRAZINE PLUS PENDIMETHALIN ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98I1A CROP: CORN, FIELD (3751IR). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (3751IR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 6, %SAND: 44, %SILT: 33, %CLAY: 22, SOIL PH: 7.6. MATERIALS AND METHODS: TREATMENTS 7 AND 8 WERE APPLIED USING 28 % AS THE CARRIER. ALL THE OTHER TREATMENTS WERE APPLIED WITH WATER AS THE CARRIER, BUT RECEIVED A 28 % UAN APPLICATION (ON MAY 18) PRIOR TO THE HERBICIDE TREATMENTS. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD R-ROOT LAMBS LADYS VELVET BARNYA GREEN T | GROWTH ST INFO# CORN CORN P-WEED QUARTE THUMB LEAF GRASS FOXTAI R | | INCORP INFO# RATE % 3751IR 3751IR T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0D 0D 0C 0D 0C 0C 2 1 F IMAZETHAPYR 0.665 40.5SU 0 0 89ABC 83BC 95AB 75C 84AB 85AB F ATRAZINE SU 3 1 PENDIMETHALIN 1.68 40EC 0 0 83BC 100A 95AB 93AB 90AB 86AB 4 1 F IMAZETHAPYR 1.330 40.5SU 0 0 98A 100A 100A 97A 100A 98A F ATRAZINE SU T PENDIMETHALIN 2.5 40EC 5 1 F IMAZETHAPYR 0.665 40.5SU 0 0 94A 95AB 84B 95A 91AB 91A F ATRAZINE SU T PENDIMETHALIN 1.25 40EC 6 1 F IMAZETHAPYR 0.333 40.5SU 0 0 79C 78C 90AB 78BC 88AB 84AB F ATRAZINE SU T PENDIMETHALIN 0.625 40EC 7 1 F IMAZETHAPYR 0.665 40.5SU 0 0 91AB 88ABC 98AB 95A 68B 66B F ATRAZINE SU 8 1 F IMAZETHAPYR 0.665 40.5SU 0 0 89ABC 95AB 95AB 93AB 95A 91A F ATRAZINE SU T PENDIMETHALIN 1.25 40EC 9 1 T PENDIMETHALIN 1.68 40EC 0 0 94A 100A 100A 84ABC 93AB 80AB T ATRAZINE 1.5 48SU NFS NFS 10.1LSD 13.9LSD 14.4LSD 16.3LSD 25.7LSD 24.4LSD 5% 5% 5% 5% 5% 5% 0 SE 0 SE 6.9 SE 9.5 SE 9.9 SE 11 SE 17.6SE 16.7SE 0 CV 0 CV 8.7 CV 11.6CV 11.7CV 14 CV 22.5CV 22 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980602 980616 980616 980616 980616 980616 980616 980616 LEAF RANGE 4 -5 6 -8 5 -20 8 -20 4 -10 3 -10 HEIGHT (CM) 15-25 20-35 3-20 5-15 2-20 6-20 GROWTH STAGE WEED DENSITY (PL/SQ.M) 7 4.5 4.5 3 -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -CGC ( 9:1); ATRAZINE -CYC ( 2:1); IMAZETHAPYR (AC 263,499) -CYC; PENDIMETHALIN -CYC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PE CO2 SPRAYER 0.5 19 71 0 98/05/19 2100 0.4 4.6 9 42 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS GREATER VARIATION AND POORER WEED CONTROL IN THIS EXPERIMENT THAN NORMALLY EXPECTED SINCE THERE WAS VERY LITTLE RAINFALL AFTER APPLICATION TO ACTIVATE THE HERBICIDES. THERE WAS NO INJURY IN CORN WITH THE HERBICIDES EVALUATED. IMAZETHAPYR/ATRAZINE PROVIDED GOOD TO EXCELLENT EARLY SEASON WEED CONTROL. THE TANKMIX OF IMAZETHAPYR/ATRAZINE PLUS PENDIMETHALIN AT THE PROPOSED FIELD USE RATE PROVIDED EXCELLENT BROAD SPECTRUM WEED CONTROL. GENERALLY, THE WEED CONTROL WAS STATISTICALLY EQUIVALENT WHEN APPLIED IN A WATER OR LIQUID NITROGEN CARRIER (VELVETLEAF CONTROL WAS HIGHER WHEN APPLIED IN LIQUID NITROGEN). (SEE ALSO EXPERIMENT ID:FC98I1B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

61


BROADSPECTRUM WEED CONTROL IN SMART CORN WITH IMAZETHAPYR/ATRAZINE PLUS PENDIMETHALIN ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98I1B CROP: CORN, FIELD (3751IR). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (3751IR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 6, %SAND: 44, %SILT: 33, %CLAY: 22, SOIL PH: 7.6. MATERIALS AND METHODS: TREATMENTS 7 AND 8 WERE APPLIED USING 28 % AS THE CARRIER. ALL THE OTHER TREATMENTS WERE APPLIED WITH WATER AS THE CARRIER, BUT RECEIVED A 28 % UAN APPLICATION (ON MAY 18) PRIOR TO THE HERBICIDE TREATMENTS. THE "OTHER" ASSESSMENT IN COLUMN 7 IS CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# R-ROOT LAMBS VELVET E-BLAC GREEN FIELD FIELD T | GROWTH ST INFO# P-WEED QUARTE LEAF N-SHAD FOXTAI CORN CORN R | | INCORP INFO# RATE % 3751IR 3751IR T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0D 0C 0C 0B 0C 7.1C 113C 2 1 F IMAZETHAPYR 0.665 40.5SU 43C 79A 58AB 100A 80AB 10.4AB 166AB F ATRAZINE SU 3 1 PENDIMETHALIN 1.68 40EC 44C 99A 71AB 98A 94AB 9.3B 149B 4 1 F IMAZETHAPYR 1.330 40.5SU 88A 99A 87A 100A 98A 10.8A 173A F ATRAZINE SU T PENDIMETHALIN 2.5 40EC 5 1 F IMAZETHAPYR 0.665 40.5SU 76AB 80A 81A 95A 91AB 10.6A 169A F ATRAZINE SU T PENDIMETHALIN 1.25 40EC 6 1 F IMAZETHAPYR 0.333 40.5SU 56BC 53B 60AB 98A 81AB 9.8AB 157AB F ATRAZINE SU T PENDIMETHALIN 0.625 40EC 7 1 F IMAZETHAPYR 0.665 40.5SU 75AB 80A 81A 94A 75B 10.3AB 163AB F ATRAZINE SU 8 1 F IMAZETHAPYR 0.665 40.5SU 75AB 86A 75AB 95A 91AB 10.5A 167A F ATRAZINE SU T PENDIMETHALIN 1.25 40EC 9 1 T PENDIMETHALIN 1.68 40EC 83AB 100A 36BC 100A 80AB 10.3AB 165AB T ATRAZINE 1.5 48SU 30 LSD 22.8LSD 41.2LSD 8.3 LSD 22 LSD 1.17LSD 18.7LSD 5% 5% 5% 5% 5% 5% 5% 20.5SE 15.6SE 28 SE 5.7 SE 15 SE .8 SE 12.8SE 34.3CV 20.8CV 46 CV 6.6 CV 19.8CV 8.1 CV 8.1 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 12 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980716 980716 980716 980716 980716 981020 981020 LEAF RANGE 20- 20- 20- HEIGHT (CM) 10-115 80-115 85-120 20-55 50-95 GROWTH STAGE WEED DENSITY (PL/SQ.M) 8.5 3.5 4 5 4.5 -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -CGC ( 9:1); ATRAZINE -CYC ( 2:1); IMAZETHAPYR (AC 263,499) -CYC; PENDIMETHALIN -CYC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PE CO2 SPRAYER 0.5 19 71 0 98/05/19 2100 0.4 4.6 9 42 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: IMAZETHAPYR/ATRAZINE PROVIDED COMMERCIALLY ACCEPTABLE FULL SEASON CONTROL OF LAMB'S-QUARTERS, NIGHTSHADE, AND GREEN FOXTAIL, BUT THE CONTROL OF PIGWEED AND VELVETLEAF WAS ONLY FAIR. THE TANKMIX OF IMAZETHAPYR/ATRAZINE PLUS PENDIMETHALIN AT THE PROPOSED FIELD USE RATE, PROVIDED GOOD TO EXCELLENT FULL SEASON BROAD SPECTRUM WEED CONTROL. GENERALLY, THE WEED CONTROL WAS STATISTICALLY EQUIVALENT WHEN APPLIED IN A WATER OR LIQUID NITROGEN CARRIER (PIGWEED CONTROL WAS HIGHER WHEN APPLIED IN LIQUID NITROGEN). (SEE ALSO EXPERIMENT ID:FC98I1A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

62


BROADSPECTRUM WEED CONTROL IN SMART CORN WITH IMAZETHAPYR/ATRAZINE APPLIED POSTEMERGENCE ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98I2A CROP: CORN, FIELD (3751IR). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (3751IR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 6, %SAND: 40, %SILT: 37, %CLAY: 21, SOIL PH: 7.6. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. THE RATE OF UAN 28% WAS L/HA. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS R-ROOT VELVET LADYS GREEN T | GROWTH ST INFO# CORN CORN QUARTE P-WEED LEAF THUMB FOXTAI R | | INCORP INFO# RATE % 3751IR 3751IR T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0B 0 0C 0C 0C 0C 0D 2 1 1 F IMAZETHAPYR 0.665 40.5SU 0B 0 100A 100A 96AB 83B 95AB F ATRAZINE SU T AGRAL 90 0.25 100OT T 28-00-00 FERT 2.0 OT 3 1 1 DICAMBA 0.3 48SN 0B 0 94B 90B 94AB 90AB 0D 4 1 1 F IMAZETHAPYR 1.33 40.5SU 0B 0 100A 100A 100A 95A 99A F ATRAZINE SU T DICAMBA 0.3 48SN T AGRAL 90 0.25 100OT T 28-00-00 FERT 2.0 OT 5 1 1 F IMAZETHAPYR 0.665 40.5SU 0B 0 100A 100A 100A 97A 93AB F ATRAZINE SU T DICAMBA 0.15 48SN T AGRAL 90 0.25 100OT T 28-00-00 FERT 2.0 OT 6 1 1 F IMAZETHAPYR 0.333 40.5SU 0B 0 100A 100A 99AB 95A 84BC F ATRAZINE SU T DICAMBA 0.075 48SN T AGRAL 90 0.25 100OT T 28-00-00 FERT 2.0 OT 7 1 1 T PENDIMETHALIN 1 40EC 0B 0 100A 100A 96AB 100A 94AB T RIMSULFURON 0.012 25WG T DICAMBA 0.3 48SN T AGRAL 90 0.25 100OT 8 1 1 T NICOSULFURON 0.025 75WG 0B 0 100A 99A 93B 96A 93AB T DICAMBA 0.3 48SN T AGRAL 90 0.25 100OT 9 1 1 T DPX 79406 0.025 25WG 0B 0 99A 100A 93B 100A 97A T DICAMBA 0.3 48SN T AGRAL 90 0.25 100OT10 1 1 F IMAZETHAPYR 0.665 40.5SU 4A 0 100A 100A 98AB 100A 79C F ATRAZINE SU F ATRAZINE 1.404 39SU F 2,4-D ESTER SU T AGRAL 90 0.25 100OT 0.7 LSD NFS 3.2 LSD 3.5 LSD 6.9 LSD 11 LSD 11.4LSD 5% 5% 5% 5% 5% 5% 0.5 SE 0 SE 2.2 SE 2.4 SE 4.8 SE 7.7 SE 7.9 SE 112 CV 0 CV 2.47CV 2.7 CV 5.5 CV 9.1 CV 10.7CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980610 980701 980701 980701 980701 980701 980701 LEAF RANGE 5 -6 10-11 10-20 5 -20 8 -20 12-20 4 -8 HEIGHT (CM) 25-35 35-110 10-20 5-25 10-30 7-25 20-35 GROWTH STAGE WEED DENSITY (PL/SQ.M) 3 6 2.5 8 1.5 -----------------------------------------------------------------------------------------------------------------------------------2,4-D ESTER -UAP; 28-00-00 FERT -OTH; AGRAL 90 -CHP; ATRAZINE -CYC ( 2:1); ATRAZINE -CYC ( 4:1); ATRAZINE -CYC ( 5:1); ATRAZINE -CYC ( 6:1); ATRAZINE -CYC (10:1); ATRAZINE -UAP (10:1); DICAMBA -BAZ; DPX 79406 -DUQ; IMAZETHAPYR (AC 263,499) -CYC; NICOSULFURON (DPX V9360) -DUQ; PENDIMETHALIN -CYC; RIMSULFURON (DPX-E-9636) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 17 33 10 98/06/03 1030 8.8 3 12 27 16

63

------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (3751IR ) 5 6 15 20 | CRAB GRASS 9 10 1 | LAMBS QUARTE 6 8 3 6 3 | LADYS THUMB 4 6 5 4.5 | VELVETLEAF 5 5 3 | R-ROOTP-WEED 4 6 3 5 7.5 | E-BLACN-SHAD 6 3 1.5 | GREEN FOXTAI 4 5 3.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO INJURY OF COMMERCIAL SIGNIFICANCE IN CORN WITH THE POSTEMERGENCE HERBICIDES EVALUATED. IMAZETHAPYR/ATRAZINE PROVIDED GOOD TO EXCELLENT EARLY SEASON WEED CONTROL. DICAMBA PROVIDED EXCELLENT BROADLEAF WEED CONTROL. THE TANKMIX OF IMAZETHAPYR/ATRAZINE PLUS DICAMBA AT THE PROPOSED FIELD USE RATE PROVIDED EXCELLENT BROAD SPECTRUM WEED CONTROL. THE TANKMIXES OF PENDIMETHALIN + RIMSULFURON + DICAMBA; RIMSULFURON + DICAMBA; AND DPX 79406 + DICAMBA ALSO PROVIDED EXCELLENT WEED CONTROL. THE TANKMIX OF IMAZETHAPYR/ATRAZINE PLUS ATRAZINE/2,4-D WAS A LITTLE WEAK ON GREEN FOXTAIL. (SEE ALSO EXPERIMENT ID:FC98I2B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

64


BROADSPECTRUM WEED CONTROL IN SMART CORN WITH IMAZETHAPYR/ATRAZINE APPLIED POSTEMERGENCE ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98I2B CROP: CORN, FIELD (3751IR). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (3751IR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 6, %SAND: 40, %SILT: 37, %CLAY: 21, SOIL PH: 7.6. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. THE RATE OF UAN 28% WAS L/HA. THE "OTHER" ASSESSMENT IN COLUMN 7 IS CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS R-ROOT VELVET LADYS GREEN FIELD FIELD T | GROWTH ST INFO# QUARTE P-WEED LEAF THUMB FOXTAI CORN CORN R | | INCORP INFO# RATE % 3751IR 3751IR T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0C 0C 0C 0D 0E 7.0B 112B 2 1 1 F IMAZETHAPYR 0.665 40.5SU 98AB 100A 93AB 81C 98AB 8.8A 139A F ATRAZINE SU T AGRAL 90 0.25 100OT T 28-00-00 FERT 2.0 OT 3 1 1 DICAMBA 0.3 48SN 94B 93B 90B 93AB 0E 9.1A 145A 4 1 1 F IMAZETHAPYR 1.33 40.5SU 100A 100A 100A 98A 98A 9.3A 148A F ATRAZINE SU T DICAMBA 0.3 48SN T AGRAL 90 0.25 100OT T 28-00-00 FERT 2.0 OT 5 1 1 F IMAZETHAPYR 0.665 40.5SU 100A 100A 100A 89ABC 95AB 9.5A 151A F ATRAZINE SU T DICAMBA 0.15 48SN T AGRAL 90 0.25 100OT T 28-00-00 FERT 2.0 OT 6 1 1 F IMAZETHAPYR 0.333 40.5SU 98AB 95AB 94AB 88BC 76D 8.6A 137A F ATRAZINE SU T DICAMBA 0.075 48SN T AGRAL 90 0.25 100OT T 28-00-00 FERT 2.0 OT 7 1 1 T PENDIMETHALIN 1 40EC 98AB 100A 96AB 96AB 91B 8.6A 138A T RIMSULFURON 0.012 25WG T DICAMBA 0.3 48SN T AGRAL 90 0.25 100OT 8 1 1 T NICOSULFURON 0.025 75WG 100A 95AB 91B 94AB 79CD 8.6A 136A T DICAMBA 0.3 48SN T AGRAL 90 0.25 100OT 9 1 1 T DPX 79406 0.025 25WG 100A 98AB 90B 96AB 94AB 9.3A 148A T DICAMBA 0.3 48SN T AGRAL 90 0.25 100OT10 1 1 F IMAZETHAPYR 0.665 40.5SU 100A 100A 95AB 97AB 84C 9.5A 151A F ATRAZINE SU F ATRAZINE 1.404 39SU F 2,4-D ESTER SU T AGRAL 90 0.25 100OT 5 LSD 7.1 LSD 8.6 LSD 9.7 LSD 6.7 LSD 0.97LSD 15.6LSD 5% 5% 5% 5% 5% 5% 5% 3.4 SE 4.9 SE 5.9 SE 6.7 SE 4.6 SE 0.67SE 10.8SE 3.9 CV 5.5 CV 7 CV 8.1 CV 6.4 CV 7.61CV 7.7 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 12 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980727 980727 980727 980727 980727 981020 981020 LEAF RANGE 20- 12-20 4 -12 20- 8 -20 HEIGHT (CM) 50-120 15-90 20-120 30-70 15-60 GROWTH STAGE WEED DENSITY (PL/SQ.M) 6.5 15.5 2.5 8 3 -----------------------------------------------------------------------------------------------------------------------------------2,4-D ESTER -UAP; 28-00-00 FERT -OTH; AGRAL 90 -CHP; ATRAZINE -CYC ( 2:1); ATRAZINE -CYC ( 4:1); ATRAZINE -CYC ( 5:1); ATRAZINE -CYC ( 6:1); ATRAZINE -CYC (10:1); ATRAZINE -UAP (10:1); DICAMBA -BAZ; DPX 79406 -DUQ; IMAZETHAPYR (AC 263,499) -CYC; NICOSULFURON (DPX V9360) -DUQ; PENDIMETHALIN -CYC; RIMSULFURON (DPX-E-9636) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 17 33 10 98/06/03 1030 8.8 3 12 27 16

65

------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (3751IR ) 5 6 15 20 | CRAB GRASS 9 10 1 | LAMBS QUARTE 6 8 3 6 3 | LADYS THUMB 4 6 5 4.5 | VELVETLEAF 5 5 3 | R-ROOTP-WEED 4 6 3 5 7.5 | E-BLACN-SHAD 6 3 1.5 | GREEN FOXTAI 4 5 3.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: IMAZETHAPYR/ATRAZINE APPLIED POSTEMERGENCE, PROVIDED EXCELLENT FULL SEASON WEED CONTROL, WITH THE EXCEPTION OF LADY'S THUMB. DICAMBA PROVIDED EXCELLENT BROADLEAF WEED CONTROL. THE TANKMIX OF IMAZETHAPYR/ATRAZINE PLUS DICAMBA AT THE PROPOSED FIELD USE RATE, PROVIDED EXCELLENT BROAD SPECTRUM WEED CONTROL. THE TANKMIXES OF PENDIMETHALIN + RIMSULFURON + DICAMBA, AND DPX 79406 + DICAMBA ALSO PROVIDED EXCELLENT WEED CONTROL. THE TANKMIXES OF NICOSULFURON + DICAMBA, AND IMAZETHAPYR/ATRAZINE + ATRAZINE/2,4-D WERE A LITTLE WEAK ON GREEN FOXTAIL. (SEE ALSO EXPERIMENT ID:FC98I2AB). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

66


TOLERANCE OF GA21 ROUNDUP READY CORN TO GLYPHOSATE ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98RR1 CROP: CORN, FIELD (DK493RR). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 FERT MAINT APPL: PRIMEXTRA LIGHT 2.9 + (HERBICIDE), FIELDSTAR .185 KG AI/HA (HERBICIDE). PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (DK493RR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 5, %SAND: 41, %SILT: 37, %CLAY: 20, SOIL PH: 7.3. MATERIALS AND METHODS: THE TRIAL WAS MAINTAINED WEED FREE. THE "OTHER" ASSESSMENT IN COLUMNS 1, 4, AND 7 REPRESENT % GROWTH REDUCTION. THE "OTHER" ASSESSMENT IN COLUMNS 2,5, AND 8 REPRESENT % LEAF CHLOROSIS. THE "OTHER" ASSESSMENT IN COLUMNS 3, 6, AND 9 REPRESENT THE % MALFORMED PLANTS. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD T | GROWTH ST INFO# CORN CORN CORN CORN CORN CORN CORN CORN CORN CORN CORN R | | INCORP INFO# RATE % 493RR 493RR 493RR 493RR 493RR 493RR 493RR 493RR 493RR 493RR 493RR T | | | KG/HA CONC OTHER OTHER OTHER OTHER OTHER OTHER OTHER OTHER OTHER HEIGHT YIELD # V V V MIX MANAGEMENT (AI) ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS (CM) T/HA ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK,WEED FREE 0 0 0 0 0 0 0 0 0 224 8.4 2 1 1 GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 227 8.8 3 1 1 GLYPHOSATE 1.8 36SN 0 0 0 0 0 0 0 0 0 222 7.9 4 2 2 GLYPHOSATE 0.9 36SN 0 0 0 3 0 0 0 0 0 223 8.7 5 2 2 GLYPHOSATE 1.8 36SN 0 0 0 6 0 0 0 0 0 225 8.0 6 3 3 GLYPHOSATE 0.9 36SN 0 0 0 5 0 0 0 0 0 226 8.2 7 3 3 GLYPHOSATE 1.8 36SN 0 0 0 0 0 0 0 0 0 218 8.7 8 1 1 GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 227 7.9 3 3 GLYPHOSATE 0.9 36SN 9 1 1 GLYPHOSATE 1.8 36SN 0 0 0 5 0 0 0 0 0 220 8.2 3 3 GLYPHOSATE 1.8 36SN NFS NFS NFS NFS NFS NFS NFS NFS NFS NFS NFS 0 SE 0 SE 0 SE 5.1 SE 0 SE 0 SE 0 SE 0 SE 0 SE 9.9 SE .57 SE 0 CV 0 CV 0 CV 243 CV 0 CV 0 CV 0 CV 0 CV 0 CV 4.4 CV 6.8 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 16 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 1 10 1 DATE ASSESSED (YYMMDD) 980630 980630 980630 980717 980717 980717 980727 980727 980727 980804 981021 LEAF RANGE 10-11 10-11 10-11 HEIGHT (CM) 70 70 70 120-140 120-140 120-140 GROWTH STAGE FLOWER FLOWER FLOWER WEED DENSITY (PL/SQ.M) -----------------------------------------------------------------------------------------------------------------------------------GLYPHOSATE -MOL; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 10 73 0 98/06/03 0630 8.8 3 12 27 16 2 200 200 POST-E CO2 SPRAYER 0.5 18 79 3 98/06/11 0745 3.6 12 .8 19 16 3 200 200 POST-E CO2 SPRAYER 0.5 31 51 2 98/06/19 1345 5 .8 24 11 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (DK493RR) 2 5 3 20 | 2 FIELD CORN (DK493RR) 3 6 10 30 | 3 FIELD CORN (DK493RR) 4 7 15 40 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THIS TRIAL WAS MAINTAINED WEED FREE TO EVALUATE THE TOLERANCE OF ROUNDUP READY CORN TO GLYPHOSATE APPLIED AT THREE APPLICATION TIMINGS, PLUS TWO SEQUENTIAL APPLICATIONS. THERE WAS NO INJURY IN ROUNDUP READY CORN WITH THE RATES OF GLYPHOSATE EVALUATED. NO INJURY WAS OBSERVED IN RESPECT TO GROWTH REDUCTION, LEAF CHLOROSIS, MALFORMED PLANTS, PLANT HEIGHT, OR CROP YIELD. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

67


WEED MANAGEMENT SYSTEMS IN ROUNDUP READY CORN ECW/EDI-2.4SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98RR2A CROP: CORN, FIELD (DK493RR). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 8 X 2M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (DK493RR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 7, %SAND: 37, %SILT: 38, %CLAY: 23, SOIL PH: 6.8. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. THE "OTHER" ASSESSMENT IN COLUMNS 1, 4, AND 7 REPRESENT % PLANT GROWTH REDUCTION. THE "OTHER" ASSESSMENT IN COLUMNS 2, 5, AND 8 REPRESENT % LEAF CHLOROSIS. THE "OTHER" ASSESSMENT IN COLUMNS 3, 6, AND 9 REPRESENT THE % MALFORMED PLANTS. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD T | GROWTH ST INFO# CORN CORN CORN CORN CORN CORN CORN CORN CORN R | | INCORP INFO# RATE % DK493R DK493R DK493R DK493R DK493R DK493R DK493R DK493R DK493R T | | | KG/HA CONC OTHER OTHER OTHER OTHER OTHER OTHER OTHER OTHER OTHER # V V V MIX MANAGEMENT (AI) ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0 0 0 0 0 0 0 2 1 F CGA 77102 1.90 93.5EC 0 0 0 0 0 0 0 0 0 F BENOXACOR 3EC T NAF-72 0.185 85.6WG 3 2 1 ATRAZINE 1.0 90WG 0 0 0 0 0 0 0 0 0 4 2 1 PENDIMETHALIN 1.0 40EC 0 0 0 0 0 0 0 0 0 5 2 1 F DICAMBA 1.5 40SU 0 0 0 0 0 0 0 0 0 F ATRAZINE SU 6 2 1 F METOLACHLOR 2.9 50SU 0 0 0 0 0 0 0 0 0 F ATRAZINE SU 7 2 1 DICAMBA 0.28 48SN 0 0 0 0 0 0 0 0 0 8 2 1 T DPX 79406 0.025 25WG 0 0 0 0 0 0 0 0 0 T NAF-73 0.236 84.3WG T AGRAL 90 0.25 100OT 9 2 1 GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 10 3 2 GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 11 2 1 GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 4 3 GLYPHOSATE 0.9 36SN12 2 1 T GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 T ATRAZINE 1.0 90WG13 2 1 T GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 T PENDIMETHALIN 1.0 40EC14 2 1 T GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 F DICAMBA 1.0 40.1SU F ATRAZINE SU15 2 1 T GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 F DICAMBA 1.5 40.1SU F ATRAZINE SU16 2 1 T GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 F METOLACHLOR 2.0 50SU F ATRAZINE SU17 2 1 T GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 F METOLACHLOR 2.9 50SU F ATRAZINE SU18 2 1 T GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 T DICAMBA 0.28 48SN19 2 1 T GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 F ATRAZINE 1.404 39SU F 2,4-D ESTER SU NFS NFS NFS NFS NFS NFS NFS NFS NFS 0 SE 0 SE 0 SE 0 SE 0 SE 0 SE 0 SE 0 SE 0 SE 0 CV 0 CV 0 CV 0 CV 0 CV 0 CV 0 CV 0 CV 0 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980623 980623 980623 980721 980721 980721 980809 980809 980809 LEAF RANGE 8 -14 8 -14 8 -14 10-15 10-15 10-15 HEIGHT (CM) 120-220 120-220 120-220 160-250 160-250 160-250 GROWTH STAGE PLANT DENSITY (PL/SQ.M) -----------------------------------------------------------------------------------------------------------------------------------2,4-D ESTER -UAP; AGRAL 90 -CHP; ATRAZINE -BAZ ( 5:1); ATRAZINE -BAZ (14:1); ATRAZINE -BAZ (15:1); ATRAZINE -CGC ( 3:1); ATRAZINE -CGC ( 6:1); ATRAZINE -CGC (12:1); ATRAZINE -CGC (16:1); ATRAZINE -CGC (17:1); ATRAZINE -UAP (19:1); BENOXACOR -CGC; CGA 77102 -CGC; DICAMBA -BAZ; DPX 79406 -DUQ; GLYPHOSATE -MOL; METOLACHLOR -CGC; NAF-72 -DWE; NAF-73 -DWE; PENDIMETHALIN -CYC;

68

------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PE CO2 SPRAYER .5 26 41 1 98/05/18 0920 2.2 2.8 11 43 16 2 200 200 POST-E CO2 SPRAYER .5 10 40 0 98/06/04 0700 8.8 3.6 12 26 16 3 200 200 POST-E CO2 SPRAYER .5 18 79 3 98/06/11 0755 3.6 12 .8 19 16 4 200 200 POST-E CO2 SPRAYER .5 19 80 0 98/06/17 0645 12 1.4 24 13 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (DK493RR) 2 6 10 25 | BARNYAGRASS 3 6 3 4 1.5 | VELVETLEAF 4 5 1 | 2 FIELD CORN (DK493RR) 4 6 15 30 | COMMONRAGWEE 4 20 5 20 1.5 | LAMBS QUARTE 6 10 5 8 1 | VELVETLEAF 3 6 4 10 3.5 | CRAB GRASS 5 6 4 5 1 | GREEN FOXTAI 3 6 4 8 2 | BARNYAGRASS 3 7 5 10 1 | 3 FIELD CORN (DK493RR) 6 7 35 | BARNYAGRASS 4 8 10 1 | VELVETLEAF 4 7 10 3.5 | COMMONRAGWEE 4 12 1.5 | LAMBS QUARTE 8 12 10 1 | CRAB GRASS 6 7 8 1 | GREEN FOXTAI 4 7 6 2 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO INJURY IN ROUNDUP READY CORN WITH THE HERBICIDE TREATMENTS EVALUATED. (SEE ALSO EXPERIMENT ID:FC98RR2B,C). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

69


WEED MANAGEMENT SYSTEMS IN ROUNDUP READY CORN ECW/EDI-2.4SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98RR2B CROP: CORN, FIELD (DK493RR). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 8 X 2M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (DK493RR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 7, %SAND: 37, %SILT: 38, %CLAY: 23, SOIL PH: 6.8. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# R-ROOT LAMBS VELVET COMMON GREEN BARNYA R-ROOT LAMBS VELVET COMMON GREEN T | GROWTH ST INFO# P-WEED QUARTE LEAF RAGWEE FOXTAI GRASS P-WEED QUARTE LEAF RAGWEE FOXTAI R | | INCORP INFO# RATE % T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0D 0C 0H 0E 0D 0D 0F 0D 0I 0C 0H 2 1 F CGA 77102 1.90 93.5EC 70B 58B 45EF 65BCD 58B 58BC 69E 85B 68B-E 75AB 55DE F BENOXACOR 3EC T NAF-72 0.185 85.6WG 3 2 1 ATRAZINE 1.0 90WG 90A 90A 18GH 50D 53BC 50C 86CD 90AB 19HI 50B 63B-E 4 2 1 PENDIMETHALIN 1.0 40EC 35C 53B 56DE 63CD 38BC 50C 78DE 63C 41FG 68AB 40EF 5 2 1 F DICAMBA 1.5 40SU 100A 98A 58DE 100A 30C 50C 100A 100A 79A-E 100A 25FG F ATRAZINE SU 6 2 1 F METOLACHLOR 2.9 50SU 100A 100A 33FG 65BCD 35BC 75ABC 98AB 98A 40GH 50B 45EF F ATRAZINE SU 7 2 1 DICAMBA 0.28 48SN 91A 84A 45EF 100A 0D 0D 98AB 98A 65B-E 100A 13GH 8 2 1 T DPX 79406 0.025 25WG 100A 100A 91AB 98A 95A 98A 98AB 98A 83A-D 95A 93A T NAF-73 0.236 84.3WG T AGRAL 90 0.25 100OT 9 2 1 GLYPHOSATE 0.9 36SN 90A 95A 78BC 91ABC 89A 98A 86CD 96AB 64CDE 90A 80ABC10 3 2 GLYPHOSATE 0.9 36SN 86AB 100A 69CD 95AB 83A 99A 90ABC 98A 63DEF 90A 79A-D11 2 1 GLYPHOSATE 0.9 36SN 99A 100A 98A 100A 98A 99A 100A 100A 91A 100A 95A 4 3 GLYPHOSATE 0.9 36SN12 2 1 T GLYPHOSATE 0.9 36SN 98A 100A 71CD 100A 93A 100A 100A 100A 61D-G 100A 75A-D T ATRAZINE 1.0 90WG13 2 1 T GLYPHOSATE 0.9 36SN 93A 100A 75BCD 100A 93A 99A 88BCD 100A 66B-E 95A 91A T PENDIMETHALIN 1.0 40EC14 2 1 T GLYPHOSATE 0.9 36SN 100A 98A 80ABC 100A 95A 100A 100A 100A 86AB 100A 88A F DICAMBA 1.0 40.1SU F ATRAZINE SU15 2 1 T GLYPHOSATE 0.9 36SN 100A 100A 79ABC 98A 91A 100A 100A 100A 85ABC 100A 98A F DICAMBA 1.5 40.1SU F ATRAZINE SU16 2 1 T GLYPHOSATE 0.9 36SN 100A 98A 70CD 98A 98A 100A 100A 100A 59EFG 93A 100A F METOLACHLOR 2.0 50SU F ATRAZINE SU17 2 1 T GLYPHOSATE 0.9 36SN 100A 100A 75BCD 100A 98A 98A 100A 100A 60EFG 100A 95A F METOLACHLOR 2.9 50SU F ATRAZINE SU18 2 1 T GLYPHOSATE 0.9 36SN 100A 99A 84ABC 99A 99A 99A 100A 100A 86AB 100A 86AB T DICAMBA 0.28 48SN19 2 1 T GLYPHOSATE 0.9 36SN 98A 100A 78BC 100A 50BC 85AB 98AB 98A 66B-E 100A 60CDE F ATRAZINE 1.404 39SU F 2,4-D ESTER SU 17 LSD 19.3LSD 19.7LSD 31.7LSD 22.7LSD 32.2LSD 10.8LSD 12 LSD 22.1LSD 33.3LSD 24.8LSD 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 12 SE 13.6SE 14 SE 22.4SE 16.1SE 22.8SE 7.6 SE 8.5 SE 15.6SE 23.5SE 17.6SE 13.8CV 15.5CV 22 CV 26.3CV 23.7CV 29.8CV 8.58CV 9.4 CV 25.2CV 27.9CV 26.1CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980702 980702 980702 980702 980702 980702 980721 980721 980721 980721 980721 LEAF RANGE 12- 20- 4 -12 20- 6 -10 4 -10 20- 20- 4 -10 20- 4 -8 HEIGHT (CM) 30- 40 35 50 35 30 40-150 150 20-140 65-140 70-80 GROWTH STAGE FLOWER PLANT DENSITY (PL/SQ.M) 4 1.5 11.5 1 3 3.5 7.5 1 6 3 1 -----------------------------------------------------------------------------------------------------------------------------------2,4-D ESTER -UAP; AGRAL 90 -CHP; ATRAZINE -BAZ ( 5:1); ATRAZINE -BAZ (14:1); ATRAZINE -BAZ (15:1); ATRAZINE -CGC ( 3:1); ATRAZINE -CGC ( 6:1); ATRAZINE -CGC (12:1); ATRAZINE -CGC (16:1); ATRAZINE -CGC (17:1); ATRAZINE -UAP (19:1); BENOXACOR -CGC; CGA 77102 -CGC; DICAMBA -BAZ; DPX 79406 -DUQ; GLYPHOSATE -MOL; METOLACHLOR -CGC; NAF-72 -DWE; NAF-73 -DWE; PENDIMETHALIN -CYC;

70

------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PE CO2 SPRAYER .5 26 41 1 98/05/18 0920 2.2 2.8 11 43 16 2 200 200 POST-E CO2 SPRAYER .5 10 40 0 98/06/04 0700 8.8 3.6 12 26 16 3 200 200 POST-E CO2 SPRAYER .5 18 79 3 98/06/11 0755 3.6 12 .8 19 16 4 200 200 POST-E CO2 SPRAYER .5 19 80 0 98/06/17 0645 12 1.4 24 13 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (DK493RR) 2 6 10 25 | BARNYAGRASS 3 6 3 4 1.5 | VELVETLEAF 4 5 1 | 2 FIELD CORN (DK493RR) 4 6 15 30 | COMMONRAGWEE 4 20 5 20 1.5 | LAMBS QUARTE 6 10 5 8 1 | VELVETLEAF 3 6 4 10 3.5 | CRAB GRASS 5 6 4 5 1 | GREEN FOXTAI 3 6 4 8 2 | BARNYAGRASS 3 7 5 10 1 | 3 FIELD CORN (DK493RR) 6 7 35 | BARNYAGRASS 4 8 10 1 | VELVETLEAF 4 7 10 3.5 | COMMONRAGWEE 4 12 1.5 | LAMBS QUARTE 8 12 10 1 | CRAB GRASS 6 7 8 1 | GREEN FOXTAI 4 7 6 2 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THE LEVEL OF ANNUAL WEED CONTROL WITH THE PREEMERGENCE TREATMENT OF METOLACHLOR PLUS NAF-72 WAS LOWER THAN NORMAL DUE TO LACK OF RAINFALL TO ACTIVATE THE HERBICIDES. A SINGLE APPLICATION OF GLYPHOSATE PROVIDED GOOD EARLY SEASON WEED CONTROL, WITH THE EXCEPTION OF VELVETLEAF. THE SEQUENTIAL APPLICATION OF GLYPHOSATE PROVIDED EXCELLENT EARLY SEASON WEED CONTROL. THE TANKMIXES OF GLYPHOSATE WITH DICAMBA AND DICAMBA/ATRAZINE PROVIDED THE BEST BROAD SPECTRUM EARLY SEASON WEED CONTROL. (SEE ALSO EXPERIMENT ID:FC98RR2A,C). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

71


WEED MANAGEMENT SYSTEMS IN ROUNDUP READY CORN ECW/EDI-2.4SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98RR2C CROP: CORN, FIELD (DK493RR). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 8 X 2M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (DK493RR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 7, %SAND: 37, %SILT: 38, %CLAY: 23, SOIL PH: 6.8. MATERIALS AND METHODS: THE RATE OF AGRAL 90 WAS % V/V, NOT KG AI/HA. THE "OTHER ASSESSMENT" IN COLUMN 7 IS CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# R-ROOT LAMBS VELVET COMMON GREEN FIELD FIELD T | GROWTH ST INFO# P-WEED QUARTE LEAF RAGWEE FOXTAI CORN CORN R | | INCORP INFO# RATE % DK493R DK493R T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0D 0D 0F 0D 0H 6.2F 99D 2 1 F CGA 77102 1.90 93.5EC 80AB 100A 81A-D 88AB 63B-G 8.5A-D 136AB F BENOXACOR 3EC T NAF-72 0.185 85.6WG 3 2 1 ATRAZINE 1.0 90WG 100A 70B 58E 48C 74A-F 7.1EF 113CD 4 2 1 PENDIMETHALIN 1.0 40EC 35C 38C 81A-D 50C 45FG 7.0EF 111CD 5 2 1 F DICAMBA 1.5 40SU 100A 100A 96AB 100A 61C-G 8.6A-D 136AB F ATRAZINE SU 6 2 1 F METOLACHLOR 2.9 50SU 100A 100A 75CDE 61BC 60D-G 8.4BCD 135AB F ATRAZINE SU 7 2 1 DICAMBA 0.28 48SN 100A 100A 95ABC 100A 33GH 7.9CDE 126BC 8 2 1 T DPX 79406 0.025 25WG 98AB 93AB 96AB 95A 96A 8.5A-D 136AB T NAF-73 0.236 84.3WG T AGRAL 90 0.25 100OT 9 2 1 GLYPHOSATE 0.9 36SN 85AB 93AB 79BCD 98A 93A-D 9.0ABC 143AB 10 3 2 GLYPHOSATE 0.9 36SN 95AB 95A 83A-D 90AB 79A-E 9.5AB 151A 11 2 1 GLYPHOSATE 0.9 36SN 98AB 98A 93ABC 100A 98A 9.2AB 147A 4 3 GLYPHOSATE 0.9 36SN12 2 1 T GLYPHOSATE 0.9 36SN 100A 100A 76B-E 100A 93A-D 9.3AB 148A T ATRAZINE 1.0 90WG13 2 1 T GLYPHOSATE 0.9 36SN 93AB 100A 80A-D 91AB 100A 9.0A-D 143AB T PENDIMETHALIN 1.0 40EC14 2 1 T GLYPHOSATE 0.9 36SN 88AB 98A 100A 100A 95AB 9.4AB 150A F DICAMBA 1.0 40.1SU F ATRAZINE SU15 2 1 T GLYPHOSATE 0.9 36SN 100A 100A 96AB 100A 93A-D 8.8A-D 140AB F DICAMBA 1.5 40.1SU F ATRAZINE SU16 2 1 T GLYPHOSATE 0.9 36SN 74B 100A 94ABC 100A 100A 9.1AB 145A F METOLACHLOR 2.0 50SU F ATRAZINE SU17 2 1 T GLYPHOSATE 0.9 36SN 100A 100A 71DE 100A 94ABC 9.2AB 146A F METOLACHLOR 2.9 50SU F ATRAZINE SU18 2 1 T GLYPHOSATE 0.9 36SN 100A 99A 93ABC 100A 93A-D 9.6A 152A T DICAMBA 0.28 48SN19 2 1 T GLYPHOSATE 0.9 36SN 100A 100A 76B-E 98A 51EFG 7.9DE 125BC F ATRAZINE 1.404 39SU F 2,4-D ESTER SU 25.6LSD 20 LSD 20.7LSD 31.4LSD 33.6LSD 1.12LSD 17.9LSD 5% 5% 5% 5% 5% 5% 5% 18.1SE 14.2SE 14.6SE 22.2SE 23.8SE 0.79SE 12.7SE 20.9CV 16 CV 18.3CV 26 CV 31.8CV 9.3 CV 9.3 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 12 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980810 980810 980810 980810 980810 981021 981021 LEAF RANGE 20- 20- 8 -20 20- 8 -16 HEIGHT (CM) 60-160 50-130 110-160 60-160 40-100 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 6 3 5.5 3.5 5.5 -----------------------------------------------------------------------------------------------------------------------------------2,4-D ESTER -UAP; AGRAL 90 -CHP; ATRAZINE -BAZ ( 5:1); ATRAZINE -BAZ (14:1); ATRAZINE -BAZ (15:1); ATRAZINE -CGC ( 3:1); ATRAZINE -CGC ( 6:1); ATRAZINE -CGC (12:1); ATRAZINE -CGC (16:1); ATRAZINE -CGC (17:1); ATRAZINE -UAP (19:1); BENOXACOR -CGC; CGA 77102 -CGC; DICAMBA -BAZ; DPX 79406 -DUQ; GLYPHOSATE -MOL; METOLACHLOR -CGC; NAF-72 -DWE; NAF-73 -DWE; PENDIMETHALIN -CYC;

72

------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PE CO2 SPRAYER .5 26 41 1 98/05/18 0920 2.2 2.8 11 43 16 2 200 200 POST-E CO2 SPRAYER .5 10 40 0 98/06/04 0700 8.8 3.6 12 26 16 3 200 200 POST-E CO2 SPRAYER .5 18 79 3 98/06/11 0755 3.6 12 .8 19 16 4 200 200 POST-E CO2 SPRAYER .5 19 80 0 98/06/17 0645 12 1.4 24 13 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (DK493RR) 2 6 10 25 | BARNYAGRASS 3 6 3 4 1.5 | VELVETLEAF 4 5 1 | 2 FIELD CORN (DK493RR) 4 6 15 30 | COMMONRAGWEE 4 20 5 20 1.5 | LAMBS QUARTE 6 10 5 8 1 | VELVETLEAF 3 6 4 10 3.5 | CRAB GRASS 5 6 4 5 1 | GREEN FOXTAI 3 6 4 8 2 | BARNYAGRASS 3 7 5 10 1 | 3 FIELD CORN (DK493RR) 6 7 35 | BARNYAGRASS 4 8 10 1 | VELVETLEAF 4 7 10 3.5 | COMMONRAGWEE 4 12 1.5 | LAMBS QUARTE 8 12 10 1 | CRAB GRASS 6 7 8 1 | GREEN FOXTAI 4 7 6 2 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: A SINGLE APPLICATION OF GLYPHOSATE PROVIDED GOOD TO EXCELLENT FULL SEASON WEED CONTROL. THE SEQUENTIAL APPLICATION OF GLYPHOSATE, AND THE TANKMIXES OF GLYPHOSATE PLUS DICAMBA, OR DICAMBA/ATRAZINE PROVIDED THE BEST FULL SEASON WEED CONTROL OF THE HERBICIDE TREATMENTS EVALUATED IN THIS TRIAL. THE TANKMIXES OF GLYPHOSATE PLUS ATRAZINE, OR PENDIMETHALIN WERE WEAK ON VELVETLEAF. THE TANKMIX WITH ATRAZINE/2,4-D WAS WEAK ON VELVETLEAF AND GREEN FOXTAIL. THE TANKMIX WITH METOLACHLOR/ATRAZINE PROVIDED GOOD CONTROL, BUT WAS INCONSISTENT ON PIGWEED AND VELVETLEAF. (SEE ALSO EXPERIMENT ID:FC98RR2A,B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

73


COMPARISON OF WEED CONTROL WITH ROUNDUP READY AND LIBERTY LINK CORN ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98RR3A CROP: CORN, FIELD (VARIOUS). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (DK493RR) EMERGED ON: 98/05/21. CORN, GLUFOSINATE AMMONIUM-TOLERANT (DK493GR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 5, %SAND: 41, %SILT: 37, %CLAY: 20, SOIL PH: 7.3. MATERIALS AND METHODS: THE CORN VARIETY IN THE ODD NUMBERED TREATMENTS WAS DK493RR AND IN THE EVEN NUMBERED TREATMENTS IT WAS DK493LL. THE "OTHER" ASSESSMENTS IN COLUMNS 1, 4, AND 7 REPRESENT % GROWTH REDUCTION OF CORN. THE "OTHER" ASSESSMENTS IN COLUMNS 2, 5, AND 8 REPRESENT THE % OF MALFORMED CORN PLANTS. THE "OTHER" ASSESSMENTS IN COLUMNS 3, 6, AND 9 REPRESENT THE % OF CORN LEAF CHLOROSIS. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD T | GROWTH ST INFO# CORN CORN CORN CORN CORN CORN CORN CORN CORN R | | INCORP INFO# RATE % VARIOU VARIOU VARIOU VARIOU VARIOU VARIOU VARIOU VARIOU VARIOU T | | | KG/HA CONC OTHER OTHER OTHER OTHER OTHER OTHER OTHER OTHER OTHER # V V V MIX MANAGEMENT (AI) ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0 0 0 0 0 0 0 2 CHECK (WEEDY) 0 0 0 0 0 0 0 0 0 3 CHECK,WEED FREE 0 0 0 0 0 0 0 0 0 4 CHECK,WEED FREE 0 0 0 0 0 0 0 0 0 5 1 1 GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 6 1 1 GLUFOSINATE AMM 0.4 20SN 0 0 1 0 0 0 0 0 0 7 2 2 GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 8 2 2 GLUFOSINATE AMM 0.4 20SN 0 0 0 0 0 0 0 0 0 9 1 1 GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 3 3 GLYPHOSATE 0.9 36SN10 1 1 GLUFOSINATE AMM 0.4 20SN 0 0 0 0 0 0 0 0 0 3 3 GLUFOSINATE AMM 0.4 20SN11 1 1 T GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 1 1 T ATRAZINE 1.12 90WG12 1 1 T GLUFOSINATE AMM 0.4 20SN 0 0 1 0 0 0 0 0 0 1 1 T ATRAZINE 1.12 90WG13 1 1 T GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 T DICAMBA 0.3 48SN14 1 1 T GLUFOSINATE AMM 0.4 20SN 0 0 0 0 0 0 0 0 0 T DICAMBA 0.3 48SN15 1 1 T GLYPHOSATE 0.9 36SN 0 0 0 0 0 0 0 0 0 F DICAMBA 1.5 40.1SU F ATRAZINE SU16 1 1 T GLUFOSINATE AMM 0.4 20SN 0 0 1 0 0 0 0 0 0 F DICAMBA 1.5 40.1SU F ATRAZINE SU NFS NFS NFS NFS NFS NFS NFS NFS NFS 0 SE 0 SE 0.7 SE 0 SE 0 SE 0 SE 0 SE 0 SE 0 SE 0 CV 0 CV 505 CV 0 CV 0 CV 0 CV 0 CV 0 CV 0 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980623 980623 980623 980709 980709 980709 980720 980720 980720 LEAF RANGE 8 -9 8 -9 8 -9 14-15 14-15 14-15 HEIGHT (CM) 60 60 60 150 150 150 GROWTH STAGE FLOWER FLOWER FLOWER WEED DENSITY (PL/SQ.M) -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -BAZ (15:1); ATRAZINE -BAZ (16:1); ATRAZINE -CGC (11:1); DICAMBA -BAZ; GLUFOSINATE AMMONIUM -CAX; GLYPHOSATE -MOL; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 10 40 0 98/06/04 0630 8.8 3.6 12 26 16 2 200 200 POST-E CO2 SPRAYER 0.5 18 79 3 98/06/11 0730 3.6 12 .8 19 16 3 200 200 POST-E CO2 SPRAYER 0.5 19 80 0 98/06/17 0635 12 1.4 24 13 16

74

------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (DK493RR) 3 6 15 25 | FIELD CORN (DK493GR) 3 6 15 25 | COMMONRAGWEE 4 6 4 5 1.5 | VELVETLEAF 2 4 2 5 7 | LAMBS QUARTE 5 7 3 4 2.5 | LADYS THUMB 5 5 .5 | R-ROOTP-WEED 4 6 2 6 2 | CRAB GRASS 3 6 2 7 2 | BARNYAGRASS 4 6 4 8 2 | 2 FIELD CORN (DK493RR) 4 7 15 35 | FIELD CORN (DK493GR) 4 7 15 35 | COMMONRAGWEE 4 6 2 5 1 | VELVETLEAF 2 6 2 6 8 | LAMBS QUARTE 6 8 5 10 2 | LADYS THUMB 3 6 3 7 3 | R-ROOTP-WEED 6 8 4 6 1.5 | CRAB GRASS 12 8 .5 | BARNYAGRASS 3 4 6 10 1.5 | GREEN FOXTAI 2 6 6 14 3 | 3 FIELD CORN (DK493RR) 6 7 25 35 | FIELD CORN (DK493GR) 6 7 25 35 | COMMONRAGWEE 5 7 8 1 | VELVETLEAF 5 7 8 8 | LAMBS QUARTE 7 9 8 2 | LADYS THUMB 5 7 8 1.5 | R-ROOTP-WEED 7 10 8 1.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO INJURY IN ROUNDUP READY OR LIBERTY LINK CORN WITH THE HERBICIDE TREATMENTS EVALUATED. (SEE ALSO EXPERIMENT ID:FC98RR3B,C). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

75


COMPARISON OF WEED CONTROL WITH ROUNDUP READY AND LIBERTY LINK CORN ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98RR3B CROP: CORN, FIELD (VARIOUS). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (DK493RR) EMERGED ON: 98/05/21. CORN, GLUFOSINATE AMMONIUM-TOLERANT (DK493GR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 5, %SAND: 41, %SILT: 37, %CLAY: 20, SOIL PH: 7.3. MATERIALS AND METHODS: THE CORN VARIETY IN THE ODD NUMBERED TREATMENTS WAS DK493RR AND IN THE EVEN NUMBERED TREATMENTS IT WAS DK493LL. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# R-ROOT LAMBS VELVET COMMON GREEN BARNYA R-ROOT LAMBS VELVET COMMON GREEN T | GROWTH ST INFO# P-WEED QUARTE LEAF RAGWEE FOXTAI GRASS P-WEED QUARTE LEAF RAGWEE FOXTAI R | | INCORP INFO# RATE % T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0C 0C 0F 0B 0C 0C 0B 0D 0H 0B 0E 2 CHECK (WEEDY) 0C 0C 0F 0B 0C 0C 0B 0D 0H 0B 0E 3 CHECK,WEED FREE 100A 100A 100A 100A 100A 100A 100A 100A 100A 100A 100A 4 CHECK,WEED FREE 100A 100A 100A 100A 100A 100A 100A 100A 100A 100A 100A 5 1 1 GLYPHOSATE 0.9 36SN 100AB 98A 88AB 95A 94AB 100A 95A 89B 68DE 98A 59CD 6 1 1 GLUFOSINATE AMM 0.4 20SN 98B 88B 63CD 100A 100A 99A 94A 73C 46FG 98A 85AB 7 2 2 GLYPHOSATE 0.9 36SN 99AB 99A 83ABC 98A 95AB 100A 93A 94AB 63DEF 96A 40D 8 2 2 GLUFOSINATE AMM 0.4 20SN 99AB 99A 28E 98A 98A 100A 95A 98AB 44G 95A 75ABC 9 1 1 GLYPHOSATE 0.9 36SN 100A 100A 99AB 100A 99A 100A 99A 100A 95AB 99A 95A 3 3 GLYPHOSATE 0.9 36SN10 1 1 GLUFOSINATE AMM 0.4 20SN 100A 100A 75BC 100A 100A 100A 96A 100A 66DE 99A 91A 3 3 GLUFOSINATE AMM 0.4 20SN11 1 1 T GLYPHOSATE 0.9 36SN 100A 100A 84ABC 98A 91AB 100A 100A 98AB 66DE 95A 65BCD 1 1 T ATRAZINE 1.12 90WG12 1 1 T GLUFOSINATE AMM 0.4 20SN 100A 100A 45DE 99A 86B 100A 100A 99A 56EFG 98A 84ABC 1 1 T ATRAZINE 1.12 90WG13 1 1 T GLYPHOSATE 0.9 36SN 100A 100A 81ABC 100A 99A 98A 100A 100A 79BCD 94A 79ABC T DICAMBA 0.3 48SN14 1 1 T GLUFOSINATE AMM 0.4 20SN 100A 99A 76ABC 100A 91AB 96A 100A 96AB 70CDE 100A 84ABC T DICAMBA 0.3 48SN15 1 1 T GLYPHOSATE 0.9 36SN 100A 100A 94AB 100A 95AB 100A 100A 100A 96AB 100A 81ABC F DICAMBA 1.5 40.1SU F ATRAZINE SU16 1 1 T GLUFOSINATE AMM 0.4 20SN 100A 100A 85ABC 100A 93AB 95A 100A 100A 86ABC 100A 85AB F DICAMBA 1.5 40.1SU F ATRAZINE SU 2.2 LSD 4.6 LSD 24.3LSD 5.1 LSD 11 LSD 4 LSD 8.5 LSD 9.5 LSD 18 LSD 6.7 LSD 25.7LSD 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 1.6 SE 3.2 SE 17 SE 3.6 SE 7.7 SE 2.8 SE 6 SE 6.6 SE 12.6SE 4.7 SE 18 SE 1.8 CV 3.7 CV 25 CV 4.1 CV 9.2 CV 3.2 CV 7 CV 7.9 CV 19.5CV 5.5 CV 25.7CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980630 980630 980630 980630 980630 980630 980720 980720 980720 980720 980720 LEAF RANGE 8 -20 20- 4 -8 10-20 3 - 3 - HEIGHT (CM) 15-60 20-35 3-30 10-25 4-20 5-15 30-125 45-140 5-135 65-135 45-95 GROWTH STAGE WEED DENSITY (PL/SQ.M) 3.5 2 11 2 4.5 4.5 4.5 7.5 12 6 12 -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -BAZ (15:1); ATRAZINE -BAZ (16:1); ATRAZINE -CGC (11:1); DICAMBA -BAZ; GLUFOSINATE AMMONIUM -CAX; GLYPHOSATE -MOL; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 10 40 0 98/06/04 0630 8.8 3.6 12 26 16 2 200 200 POST-E CO2 SPRAYER 0.5 18 79 3 98/06/11 0730 3.6 12 .8 19 16 3 200 200 POST-E CO2 SPRAYER 0.5 19 80 0 98/06/17 0635 12 1.4 24 13 16

76

------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (DK493RR) 3 6 15 25 | FIELD CORN (DK493GR) 3 6 15 25 | COMMONRAGWEE 4 6 4 5 1.5 | VELVETLEAF 2 4 2 5 7 | LAMBS QUARTE 5 7 3 4 2.5 | LADYS THUMB 5 5 .5 | R-ROOTP-WEED 4 6 2 6 2 | CRAB GRASS 3 6 2 7 2 | BARNYAGRASS 4 6 4 8 2 | 2 FIELD CORN (DK493RR) 4 7 15 35 | FIELD CORN (DK493GR) 4 7 15 35 | COMMONRAGWEE 4 6 2 5 1 | VELVETLEAF 2 6 2 6 8 | LAMBS QUARTE 6 8 5 10 2 | LADYS THUMB 3 6 3 7 3 | R-ROOTP-WEED 6 8 4 6 1.5 | CRAB GRASS 12 8 .5 | BARNYAGRASS 3 4 6 10 1.5 | GREEN FOXTAI 2 6 6 14 3 | 3 FIELD CORN (DK493RR) 6 7 25 35 | FIELD CORN (DK493GR) 6 7 25 35 | COMMONRAGWEE 5 7 8 1 | VELVETLEAF 5 7 8 8 | LAMBS QUARTE 7 9 8 2 | LADYS THUMB 5 7 8 1.5 | R-ROOTP-WEED 7 10 8 1.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: A SINGLE APPLICATION OF GLYPHOSATE PROVIDED SUPERIOR EARLY SEASON CONTROL OF LAMB'S-QUARTERS AND VELVETLEAF WHEN COMPARED TO A SINGLE APPLICATION OF GLUFOSINATE. THE EARLY SEASON CONTROL OF PIGWEED, RAGWEED, GREEN FOXTAIL, AND BARNYARD GRASS WAS EQUIVALENT FOR THE TWO HERBICIDES. THE SEQUENTIAL APPLICATION OF GLYPHOSATE PROVIDED BETTER CONTROL OF VELVETLEAF THAN GLUFOSINATE. THERE WAS A TREND TO BETTER EARLY SEASON CONTROL OF VELVETLEAF WITH THE GLYPHOSATE TANKMIXES THAN WITH THE GLUFOSINATE TANKMIXES. (SEE ALSO EXPERIMENT ID:FC98RR3A,C). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

77


COMPARISON OF WEED CONTROL WITH ROUNDUP READY AND LIBERTY LINK CORN ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98RR3C CROP: CORN, FIELD (VARIOUS). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (DK493RR) EMERGED ON: 98/05/21. CORN, GLUFOSINATE AMMONIUM-TOLERANT (DK493GR) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 5, %SAND: 41, %SILT: 37, %CLAY: 20, SOIL PH: 7.3. MATERIALS AND METHODS: THE CORN VARIETY IN THE ODD NUMBERED TREATMENTS WAS DK493RR AND IN THE EVEN NUMBERED TREATMENTS IT WAS DK493LL. THE "OTHER" ASSESSMENT IN COLUMN 7 WAS THE CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# R-ROOT LAMBS VELVET COMMON GREEN FIELD FIELD T | GROWTH ST INFO# P-WEED QUARTE LEAF RAGWEE FOXTAI CORN CORN R | | INCORP INFO# RATE % VARIOU VARIOU T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0C 0C 0G 0B 0D 6.3C 100B 2 CHECK (WEEDY) 0C 0C 0G 0B 0D 6.3C 101B 3 CHECK,WEED FREE 100A 100A 100A 100A 100A 8.6A 138A 4 CHECK,WEED FREE 100A 100A 100A 100A 100A 9.1A 145A 5 1 1 GLYPHOSATE 0.9 36SN 86B 95A 78C-F 100A 81ABC 8.4AB 135A 6 1 1 GLUFOSINATE AMM 0.4 20SN 91AB 64B 64F 100A 86ABC 7.3BC 116B 7 2 2 GLYPHOSATE 0.9 36SN 93AB 94A 71DEF 98A 76BC 9.2A 147A 8 2 2 GLUFOSINATE AMM 0.4 20SN 98A 100A 65EF 93A 71C 8.6A 138A 9 1 1 GLYPHOSATE 0.9 36SN 94AB 100A 85A-D 88A 86ABC 9.1A 145A 3 3 GLYPHOSATE 0.9 36SN10 1 1 GLUFOSINATE AMM 0.4 20SN 98A 100A 81BCD 93A 88ABC 8.6A 137A 3 3 GLUFOSINATE AMM 0.4 20SN11 1 1 T GLYPHOSATE 0.9 36SN 100A 100A 74C-F 95A 80BC 8.9A 143A 1 1 T ATRAZINE 1.12 90WG12 1 1 T GLUFOSINATE AMM 0.4 20SN 100A 98A 71DEF 93A 88ABC 8.6A 137A 1 1 T ATRAZINE 1.12 90WG13 1 1 T GLYPHOSATE 0.9 36SN 100A 100A 80B-E 95A 93AB 9.6A 153A T DICAMBA 0.3 48SN14 1 1 T GLUFOSINATE AMM 0.4 20SN 100A 95A 84BCD 100A 88ABC 8.8A 141A T DICAMBA 0.3 48SN15 1 1 T GLYPHOSATE 0.9 36SN 100A 100A 95AB 100A 81ABC 8.9A 142A F DICAMBA 1.5 40.1SU F ATRAZINE SU16 1 1 T GLUFOSINATE AMM 0.4 20SN 100A 100A 88ABC 98A 91AB 8.9A 142A F DICAMBA 1.5 40.1SU F ATRAZINE SU 9.6 LSD 7.5 LSD 16.2LSD 13.3LSD 19.2LSD 1.2 LSD 18.9LSD 5% 5% 5% 5% 5% 5% 5% 6.7 SE 5.3 SE 11.4SE 9.3 SE 13.4SE .84 SE 13.3SE 7.9 CV 6.3 CV 16.0CV 11.0CV 17.8CV 9.9 CV 9.8 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 12 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980810 980810 980810 980810 980810 981021 981021 LEAF RANGE 20- 20- 4 -20 20- HEIGHT (CM) 70-150 70-110 20-150 60-110 70-130 GROWTH STAGE WEED DENSITY (PL/SQ.M) 5 2.5 10.5 1 3 -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -BAZ (15:1); ATRAZINE -BAZ (16:1); ATRAZINE -CGC (11:1); DICAMBA -BAZ; GLUFOSINATE AMMONIUM -CAX; GLYPHOSATE -MOL; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 POST-E CO2 SPRAYER 0.5 10 40 0 98/06/04 0630 8.8 3.6 12 26 16 2 200 200 POST-E CO2 SPRAYER 0.5 18 79 3 98/06/11 0730 3.6 12 .8 19 16 3 200 200 POST-E CO2 SPRAYER 0.5 19 80 0 98/06/17 0635 12 1.4 24 13 16

78

------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (DK493RR) 3 6 15 25 | FIELD CORN (DK493GR) 3 6 15 25 | COMMONRAGWEE 4 6 4 5 1.5 | VELVETLEAF 2 4 2 5 7 | LAMBS QUARTE 5 7 3 4 2.5 | LADYS THUMB 5 5 .5 | R-ROOTP-WEED 4 6 2 6 2 | CRAB GRASS 3 6 2 7 2 | BARNYAGRASS 4 6 4 8 2 | 2 FIELD CORN (DK493RR) 4 7 15 35 | FIELD CORN (DK493GR) 4 7 15 35 | COMMONRAGWEE 4 6 2 5 1 | VELVETLEAF 2 6 2 6 8 | LAMBS QUARTE 6 8 5 10 2 | LADYS THUMB 3 6 3 7 3 | R-ROOTP-WEED 6 8 4 6 1.5 | CRAB GRASS 12 8 .5 | BARNYAGRASS 3 4 6 10 1.5 | GREEN FOXTAI 2 6 6 14 3 | 3 FIELD CORN (DK493RR) 6 7 25 35 | FIELD CORN (DK493GR) 6 7 25 35 | COMMONRAGWEE 5 7 8 1 | VELVETLEAF 5 7 8 8 | LAMBS QUARTE 7 9 8 2 | LADYS THUMB 5 7 8 1.5 | R-ROOTP-WEED 7 10 8 1.5 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: A SINGLE OR SEQUENTIAL APPLICATION OF GLYPHOSATE OR GLUFOSINATE PROVIDED COMPARABLE FULL SEASON WEED CONTROL (GLYPHOSATE PROVIDED BETTER LAMB'S-QUARTERS CONTROL FOR ONE COMPARISON). THE TANKMIXES OF GLYPHOSATE OR GLUFOSINATE PLUS ATRAZINE, DICAMBA, OR DICAMBA/ATRAZINE PROVIDED STATISTICALLY EQUIVALENT FULL SEASON WEED CONTROL. (SEE ALSO EXPERIMENT ID:FC98RR3A,B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

79


COMPARISON OF WEED CONTROL AND CROP TOLERANCE IN HERBICIDE RESISTANT CORN ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98RR4 CROP: CORN, FIELD (VARIOUS). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 1.4864 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (VARIOUS) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 6, %SAND: 44, %SILT: 33, %CLAY: 22, SOIL PH: 7.6. MATERIALS AND METHODS: THE CORN VARIETIES PLANTED IN TREATMENTS 1, 2, 3, 4, AND 5 WERE DK493, DK493RR, DK493GR, DK493SR, AND PIONEER 3751IR RESPECTIVELY. THE RATE OF ASSIST WAS % V/V, NOT KG AI/HA.------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD VELVET R-ROOT LAMBS GREEN VELVET R-ROOT LAMBS GREEN FIELD T | GROWTH ST INFO# CORN CORN LEAF P-WEED QUARTE FOXTAI LEAF P-WEED QUARTE FOXTAI CORN R | | INCORP INFO# RATE % VARIOU VARIOU VARIOU T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL YIELD # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 T/HA ------------------------------------------------------------------------------------------------------------------------------------ 1 1 F CGA 77102 1.6 40SU 0 0 64B 88AB 96 68 70 89 94 75 9.6 F ATRAZINE 1.28 32SU F BENOXACOR 2SU T DICAMBA 0.6 48SN 2 2 1 GLYPHOSATE 0.9 36SN 0 0 98A 98A 100 96 98 98 93 99 10.6 3 2 GLYPHOSATE 0.9 36SN 3 2 1 GLUFOSINATE AMM 0.4 20SN 0 0 80AB 75B 95 100 96 66 94 99 9.2 3 2 GLUFOSINATE AMM 0.4 20SN 4 2 1 T SETHOXYDIM 0.15 18.4EC 0 0 86A 100A 99 96 97 100 98 98 10.5 F DICAMBA 1.8 40.1SU F ATRAZINE SU 1 1 T ASSIST 1 OT 5 2 1 F IMAZETHAPYR 0.665 40.5SU 0 0 81AB 96A 100 89 95 100 100 96 9.8 F ATRAZINE SU T PENDIMETHALIN 1.25 40EC NFS NFS 17.5LSD 17.8LSD NFS NFS NFS NFS NFS NFS NFS 5% 5% 0 SE 0 SE 11.4SE 11.5SE 3.3 SE 22 SE 16.1SE 21.7SE 4.5 SE 16.7SE 1.6 SE 0 CV 0 CV 13.9CV 12.6CV 3.4 CV 25 CV 17.7CV 24 CV 4.7 CV 17.9CV 16.5CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 16 16 12 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980622 980720 980720 980720 980720 980720 980810 980810 980810 980810 981020 LEAF RANGE 8 -10 3 -20 7 -20 20- 3 -20 4 -12 20- 20- HEIGHT (CM) 60-80 20-105 15-60 28-45 45-110 40-200 40-130 40-120 50-120 GROWTH STAGE FLOWER WEED DENSITY (PL/SQ.M) 5 4.5 1.5 4.5 5 11 6 4.5 -----------------------------------------------------------------------------------------------------------------------------------ASSIST -BAZ; ATRAZINE -BAZ ( 4:1); ATRAZINE -CGC ( 1:1); ATRAZINE -CYC ( 5:1); BENOXACOR -CGC; CGA 77102 -CGC; DICAMBA -BAZ; GLUFOSINATE AMMONIUM -CAX; GLYPHOSATE -MOL; IMAZETHAPYR (AC 263,499) -CYC; PENDIMETHALIN -CYC; SETHOXYDIM -BAZ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 200 PE CO2 SPRAYER 0.5 26 41 2 98/05/18 0900 2.2 2.8 11 43 16 2 200 200 POST-E CO2 SPRAYER 0.5 10 73 0 98/06/03 0700 8.8 3 12 27 16 3 200 200 POST-E CO2 SPRAYER 0.5 19 80 0 98/06/17 0630 12 1.4 24 13 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (VARIOUS) 3 5 15 25 | LAMBS QUARTE 5 2 1 | R-ROOTP-WEED 5 3 1 | VELVETLEAF 2 6 3 10 3 | 2 FIELD CORN (VARIOUS) 6 7 35 | LAMBS QUARTE 6 8 10 1 | R-ROOTP-WEED 6 8 8 1 | VELVETLEAF 5 8 10 3 |------------------------------------------------------------------------------------------------------------------------------------CONCLUSIONS: THERE WAS NO INJURY IN CONVENTIONAL, ROUNDUP READY, LIBERTY LINK, POAST PROTECTED, OR IMI-SMART CORN WITH THE HERBICIDE TREATMENTS EVALUATED. THE LEVEL OF WEED CONTROL WITH METOLACHLOR/ATRAZINE PLUS DICAMBA WAS VARIABLE DUE TO LACK OF RAINFALL TO ACTIVATE THIS PREEMERGENCE APPLICATION. THE SEQUENTIAL APPLICATION OF GLYPHOSATE PROVIDED BETTER PIGWEED CONTROL THAN GLUFOSINATE. THE TANKMIXES OF SETHOXYDIM PLUS DICAMBA/ATRAZINE AND IMAZETHAPYR/ATRAZINE PLUS PENDIMETHALIN, BOTH PROVIDED EXCELLENT FULL SEASON WEED CONTROL. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

80


COMPARISON OF CROP POTENTIAL IN HERBICIDE RESISTANT CORN ECW/EDI-2.2SIKKEMA P H, ELMES M J EXPERIMENT ID: FC98RR5 CROP: CORN, FIELD (VARIOUS). PLANTED: 98/05/15, 75600 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 34-00-00 FERT BROADCAST ON 98/05/13 AT 300 KG/HA PROD WITH 06-24-24 FERT MAINT APPL: PRIMEXTRA LIGHT 2.9 (HERBICIDE), FIELDSTAR 0.1 (HERBICIDE). PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: RIDGETOWN, ON. WEATHER STN: RIDGETOWN, ON. ACTUAL PPT(MM): MAR: 80.4, APR: 83, MAY: 53.4, JUN: 39.6, JUL: 91.6, AUG: 94.6, SEP: 50.8.ACTUAL TEMP(C): MAR: 3.2, APR: 8.5, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (VARIOUS) EMERGED ON: 98/05/21. SITE DESCRIPTION: SOIL TEXTURE: LOAM. %OM: 6, %SAND: 40, %SILT: 37, %CLAY: 21, SOIL PH: 7.6. MATERIALS AND METHODS: THE CORN VARIETIES IN TREATMENTS 1, 2, 3, 4, AND 5 WERE DK493, DK493RR, PIONEER 3751IR, DK493SR, AND DK493GR RESPECTIVELY. THE TRIAL WAS MAINTAINED WEED FREE. THE "OTHER" ASSESSMENT IN COLUMN 5 REPRESENTS THE CORN YIELD IN BU/ACRE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD FIELD FIELD FIELD T | GROWTH ST INFO# CORN CORN CORN CORN CORN R | | INCORP INFO# RATE % VARIOU VARIOU VARIOU VARIOU VARIOU T | | | KG/HA CONC VIGOUR VIGOUR VIGOUR YIELD OTHER # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 T/HA ASSESS------------------------------------------------------------------------------------------------------------------------------------ 1 1 CHECK,WEED FREE 100 100 100 9.8 156 2 1 CHECK,WEED FREE 100 100 100 8.9 142 3 1 CHECK,WEED FREE 100 100 100 9.0 144 4 1 CHECK,WEED FREE 100 100 100 8.9 141 5 1 CHECK,WEED FREE 100 100 100 9.0 144 NFS NFS NFS NFS NFS 0 SE 0.4 SE 0 SE 0.7 SE 11.4SE 0 CV .45 CV 0 CV 7.8 CV 7.8 CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 12 12 NUMBER OF SAMPLES 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980610 980622 980720 981020 981020 LEAF RANGE 6 7 -9 HEIGHT (CM) 25-30 35-60 GROWTH STAGE FLOWER WEED DENSITY (PL/SQ.M) ----------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 OTHER 98/05/01 ------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO VISUAL REDUCTION IN CROP VIGOUR OBSERVED WITH THE INTRODUCTION OF THE HERBICIDE RESISTANCE GENES IN DK493 CORN. THE YIELD OF CORN FROM CONVENTIONAL DK493 AND THE HYBRIDS WITH THE VARIOUS HERBICIDE RESISTANCE GENES WAS STATISTICALLY EQUIVALENT. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

81


COMPARISON OF METOLACHLOR FORMULATIONS IMPREGNATED ON FERTILIZER II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98A1A CROP: CORN, FIELD (PION.3893). PLANTED: 98/05/06, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PION. 3893) EMERGED ON: 98/05/15. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS WILD R-ROOT WILD GREEN T | GROWTH ST INFO# CORN CORN QUARTE MUSTAR P-WEED BUCKWH FOXTAI R | | INCORP INFO# RATE % PION. PION. T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0B 0B 0B 0B 0B 2 1 1 METOLACHLOR 1.92 48SN 0 0 99A 88A 96A 93A 85A 3 1 1 F CGA 77102 1.14 76EC 0 0 96A 90A 94A 96A 84A F BENOXACOR 3.8EC NFS NFS 4.33LSD 4.99LSD 3.22LSD 8.77LSD 9.46LSD 5% 5% 5% 5% 5% 0 SE 0.29SE 2.50SE 2.89SE 1.86SE 5.07SE 5.46SE 0 CV 346 CV 3.85CV 4.88CV 2.94CV 8.06CV 9.71CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980525 980611 980611 980611 980611 980611 980611 LEAF RANGE 4 -4 6 -7 5 -6 4 -4 4 -4 2 -4 6 -7 HEIGHT (CM) 21-22 43-48 2-4 1-6 1.5-2 3-4 6-8 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 1.25 4 2 6 16 -----------------------------------------------------------------------------------------------------------------------------------BENOXACOR -CGC; CGA 77102 -CGC; METOLACHLOR -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 PPI-S HAND SHAKER GRN 1.0 23 70 4 98/05/06 1040 21 14 0 6 9------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PION. 3) |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THE HERBICIDES IN THIS TRIAL WERE IMPREGNATED ON FERTILIZER AND INCORPORATED PRIOR TO PLANTING THE CORN. DICAMBA WAS APPLIED ACROSS THE ENTIRE TRIAL FOR BROADLEAF WEED CONTROL. THERE WAS NO INJURY IN FIELD CORN WITH THE TWO FORMULATIONS OF METOLACHLOR EVALUATED. THE LEVEL OF EARLY SEASON WEED CONTROL WITH THE TWO FORMULATIONS OF METOLACHLOR WAS STATISTICALLY EQUIVALENT FOR ALL THE WEED SPECIES EVALUATED. (SEE ALSO EXPERIMENT ID:CN98A1B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

82


COMPARISON OF METOLACHLOR FORMULATIONS IMPREGNATED ON FERTILIZER II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98A1B CROP: CORN, FIELD (PIONEER 38). PLANTED: 98/05/06, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6--0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PION. 3893) EMERGED ON: 98/05/15. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: OTHER ASSESSMENT REFERS TO CROP MOISTURE AT HARVEST. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS WILD WILD GREEN FIELD FIELD T | GROWTH ST INFO# QUARTE MUSTAR BUCKWH FOXTAI CORN CORN R | | INCORP INFO# RATE % PION. PION. T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL OTHER YIELD # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 ASSESS T/HA ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0B 0B 0B 0B 18.8 7.2B 2 1 1 METOLACHLOR 1.92 48SN 100A 100A 84A 86A 18.8 8.0AB 3 1 1 F CGA 77102 1.14 76EC 100A 100A 84A 88A 18.8 8.4A F BENOXACOR 3.8EC 0 LSD 0 LSD 13.1LSD 6.61LSD NFS 0.91LSD 5% 5% 5% 5% 5% 0 SE 0 SE 7.59SE 3.82SE 0.36SE 0.52SE 0 CV 0 CV 13.6CV 6.59CV 1.90CV 6.65CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980708 980708 980708 980708 981013 981013 LEAF RANGE 9 -11 9 -12 7 -15 6 -14 HEIGHT (CM) 8-10 10-56 3-6 14-42 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 1 1 1.5 18 -----------------------------------------------------------------------------------------------------------------------------------BENOXACOR -CGC; CGA 77102 -CGC; METOLACHLOR -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 PPI-S HAND SHAKER GRN 1.0 23 70 4 98/05/06 1040 21 14 0 5 9------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PION. 3) |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THE LEVEL OF FULL SEASON WEED CONTROL WITH THE TWO FORMULATIONS OF METOLACHLOR WAS STATISTICALLY EQUIVALENT FOR ALL THE WEED SPECIES EVALUATED. (SEE ALSO EXPERIMENT ID:CN98A1A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

83


WEED CONTROL EVALUATIONS WITH NAF-72 IMPREGNATED ON FERTILIZER II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98A2A CROP: CORN, FIELD (PIONEER 38). PLANTED: 98/05/06, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PION. 3893) EMERGED ON: 98/05/15. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: TRT #1 - 300 KG/HA UREA ADDED, TRT #2 SPRAYED IN 200 L/HA OF WATER WITH 300 KG/HA ADDED, TRT #3 - 100 KG/HA UREA IMPREGNATED WITH 200 KG/HA UREA ADDED, TRT #4 - 200 KG/HA UREA IMPREGNATED WITH 100 KG/HA UREA ADDED, TRT #5 - 300 KG/HA UREA IMPREGNATED. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS WILD R-ROOT WILD T | GROWTH ST INFO# CORN CORN QUARTE MUSTAR P-WEED BUCKWH R | | INCORP INFO# RATE % PION. PION. T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0D 0B 0B 0B 0B 0B 2 1 1 NAF-72 0.185 85.6WG 3BC 3AB 98A 99A 100A 95A 3 1 1 NAF-72 0.185 85.6WG 1CD 2B 98A 100A 99A 91A 4 1 1 NAF-72 0.185 85.6WG 5AB 3AB 98A 99A 100A 94A 5 1 1 NAF-72 0.185 85.6WG 5A 6A 99A 96A 99A 95A 2.10LSD 3.30LSD 2.70LSD 4.90LSD 1.80LSD 5.80LSD 5% 5% 5% 5% 5% 5% 1.40SE 2.20SE 1.80SE 3.20SE 1.20SE 3.70SE 55.1CV 81.6CV 2.25CV 4.01CV 1.45CV 4.98CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980525 980611 980611 980611 980611 980611 LEAF RANGE 4 -4 7 -8 6 -14 5 -10 4 -5 4 -7 HEIGHT (CM) 16-21 40-45 5-9 1-7 2-3 3-9 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 11.5 3 1.75 2.3 -----------------------------------------------------------------------------------------------------------------------------------NAF-72 -DWE; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 PPI-S CO2 SPRAYER 0.5 23 70 4 98/05/06 1040 21 14 0 5 9------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PION. 3) |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THE HERBICIDE IN TREATMENT 2 WAS SPRAYED IN 200 L OF WATER PER HECTARE, WHILE IN TREATMENTS 3,4, AND 5 THE HERBICIDES WERE IMPREGNATED ON FERTILIZER AND INCORPORATED PRIOR TO PLANTING THE CORN. NICOSULFURON WAS APPLIED ACROSS THE ENTIRE TRIAL FOR ANNUAL GRASS CONTROL. ALTHOUGH THERE WAS SOME VISUAL CROP INJURY OBSERVED IN THIS TRIAL, IT WAS STILL CONSIDERED COMMERCIALLY ACCEPTABLE. NAF-72 PROVIDED EXCELLENT EARLY SEASON CONTROL OF LAMB'S-QUARTERS, WILD MUSTARD, REDROOT PIGWEED, AND WILD BUCKWHEAT. THE LEVEL OF WEED CONTROL WAS EQUIVALENT WHEN SPRAYED IN WATER OR APPLIED IMPREGNATED ON FERTILIZER. (SEE ALSO EXPERIMENT ID:CN98A2B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

84


WEED CONTROL EVALUATIONS WITH NAF-72 IMPREGNATED ON FERTILIZER II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98A2B CROP: CORN, FIELD (PIONEER 38). PLANTED: 98/05/06, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PION. 3893) EMERGED ON: 98/05/15. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: TRT #1 - 300 KG/HA UREA ADDED, TRT #2 - SPRAYED IN 200 L/HA OF WATER WITH 300 KG/HA UREA ADDED, TRT #3 - 100 KG/HA UREA IMPREGNATED WITH 200 KG/HA ADDED, TRT #4 - 200 KG/HA UREA IMPREGNATED WITH 100 KG/HA UREA ADDED, TRT #5 - 300 KG/HA UREA IMPREGNATED. OTHER ASSESSMENT REFERS TO CROP MOISTURE AT HARVEST. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS WILD COMMON GREEN WILD FIELD FIELD T | GROWTH ST INFO# QUARTE MUSTAR RAGWEE S-WEED BUCKWH CORN CORN R | | INCORP INFO# RATE % PION. PION. T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL OTHER YIELD # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 ASSESS T/HA ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0B 0B 0B 0B 0C 19.6 6.6 2 1 1 NAF-72 0.185 85.6WG 96A 100A 100A 100A 86A 19.7 7.6 3 1 1 NAF-72 0.185 85.6WG 95A 100A 100A 100A 73B 18.9 7.7 4 1 1 NAF-72 0.185 85.6WG 94A 100A 100A 100A 84AB 19.2 7.3 5 1 1 NAF-72 0.185 85.6WG 100A 100A 100A 100A 90A 19.7 7.4 7.00LSD 0 LSD 0 LSD 0 LSD 11.7LSD NFS NFS 5% 5% 5% 5% 5% 4.50SE 0 SE 0 SE 0 SE 7.60SE 0.66SE 0.78SE 5.90CV 0 CV 0 CV 0 CV 11.4CV 3.40CV 10.6CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980708 980708 980708 980708 980708 981013 981013 LEAF RANGE 13-20 4 -11 11-16 6 -12 5 -5 HEIGHT (CM) 14-36 6-26 18-42 11-20 5-5 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 6.75 1 1 1.25 1 -----------------------------------------------------------------------------------------------------------------------------------NAF-72 -DWE; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 PPI-S CO2 SPRAYER 0.5 23 70 4 98/05/06 1040 21 14 0 5 9------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PION. 3) |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: NAF-72 PROVIDED EXCELLENT FULL SEASON CONTROL OF LAMB'S-QUARTERS, WILD MUSTARD, COMMON RAGWEED, AND GREEN SMARTWEED WHILE THE CONTROL OF WILD BUCKWHEAT WAS A LITTLE VARIABLE. THE LEVEL OF LAMB'S-QUARTERS, WILD MUSTARD, COMMON RAGWEED AND GREEN SMARTWEED CONTROL WAS EQUIVALENT WHEN SPRAYED IN WATER OR APPLIED IMPREGNATED ON FERTILIZER. THE LEVEL OF WILD BUCKWHEAT CONTROL WAS LOWER WHEN NAF-72 WAS IMPREGNATED ON 100 KG/HA OF UREA PER HECTARE. WHEN THE HERBICIDE WAS IMPREGNATED ON 200 OR 300 KG/HA OF UREA PER HECTARE THE LEVEL OF WEED CONTROL WAS EQUIVALENT TO WHEN IT WAS SPRAYED IN 200 L OF WATER PER HECTARE. (SEE ALSO EXPERIMENT ID:CN98A2A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

85


EVALUATION OF FOE5043/AMS13414 APPLIED PREEMERGENCE IN CORN II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98B1A CROP: CORN, FIELD (PION. 3893). PLANTED: 98/05/06, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PION. 3893) EMERGED ON: 98/05/15. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS WILD COMMON R-ROOT WILD GREEN T | GROWTH ST INFO# CORN CORN QUARTE MUSTAR RAGWEE P-WEED BUCKWH FOXTAI R | | INCORP INFO# RATE % PION. PION. T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0C 0C 0C 0C 0C 0B 2 1 1 F FOE-5043 0.488 58WG 0 0 64B 78AB 85B 87B 78B 76A F ISOXAFLUTOLE WG 3 1 1 F FOE-5043 0.61 58WG 0 1 65B 81AB 91AB 93AB 84AB 82A F ISOXAFLUTOLE WG 4 1 1 F FOE-5043 0.976 58WG 1 1 70AB 84AB 98A 91AB 81AB 83A F ISOXAFLUTOLE WG 5 1 1 F FOE-5043 1.22 58WG 1 1 81AB 81AB 96A 95AB 81AB 87A F ISOXAFLUTOLE WG 6 1 1 F FOE-5043 0.488 58WG 0 2 79AB 83AB 96A 97A 86A 87A F ISOXAFLUTOLE WG T ATRAZINE 0.8 90WG 7 1 1 F FOE-5043 0.61 58WG 0 2 79AB 88A 96A 92AB 82AB 83A F ISOXAFLUTOLE WG T ATRAZINE 0.8 90WG 8 1 1 ATRAZINE 0.8 90WG 0 1 85A 88A 95A 91AB 82AB 84A 9 1 1 T METOLACHLOR 1.92 93.5EC 0 1 81AB 74B 95A 92AB 85A 87A T DICAMBA 0.6 48SN NFS NFS 18.8LSD 10.0LSD 9.49LSD 9.51LSD 6.71LSD 11.7LSD 5% 5% 5% 5% 5% 5% 0.57SE 1.65SE 12.9SE 6.88SE 6.50SE 6.52SE 4.60SE 8.04SE 293 CV 186 CV 19.2CV 9.45CV 7.77CV 7.97CV 6.30CV 10.8CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980525 980611 980611 980611 980611 980611 980611 980611 LEAF RANGE 4 -4 6 -7 7 -9 5 -9 4 -9 6 -6 5 -8 4 -7 HEIGHT (CM) 20-21 33-40 3-6 5-10 2-6 2-4 5-8 6-16 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 25.3 3 8.50 8.25 33 -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -CGC; DICAMBA -BAZ; FOE-5043 -CHH; ISOXAFLUTOLE (EXP 31130A) -CHH; METOLACHLOR -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 PE CO2 SPRAYER 0.5 16 83 3 98/05/12 0945 14 0 4 49 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PION. 3) |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS GREATER VARIATION AND POORER WEED CONTROL IN THIS EXPERIMENT THAN NORMALLY EXPECTED SINCE THERE WAS VERY LITTLE RAINFALL AFTER APPLICATION TO ACTIVATE THE HERBICIDES. THERE WAS NO SIGNIFICANT INJURY IN CORN WITH THE HERBICIDES EVALUATED. FOE 5043/AMS13414 PROVIDED GOOD EARLY SEASON CONTROL OF MUSTARD, RAGWEED, PIGWEED, WILD BUCKWHEAT, AND GREEN FOXTAIL WITH FAIR CONTROL OF LAMB'S-QUARTERS. THERE WAS SLIGHTLY BETTER WEED CONTROL WITH THE HIGHER RATE. THE ADDITION OF ATRAZINE RESULTED IN A SLIGHT IMPROVEMENT IN THE CONTROL OF MOST OF THE WEEDS EVALUATED. FOE 5043/AMS13414 PLUS ATRAZINE AND METOLACHLOR PLUS DICAMBA GENERALLY PROVIDED AN EQUIVALENT LEVEL OF WEED CONTROL WITH THE EXCEPTION OF MUSTARD. (SEE ALSO EXPERIMENT ID:CN98B1B, CN98B1C). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

86


EVALUATION OF FOE5043/AMS13414 APPLIED PREEMERGENCE IN CORN II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98B1B CROP: CORN, FIELD (PION. 3893). PLANTED: 98/05/06, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PION. 3893) EMERGED ON: 98/05/15. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: OTHER ASSESSMENT REFERS TO CROP MOISTURE AT HARVEST. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS WILD COMMON R-ROOT GREEN FIELD FIELD T | GROWTH ST INFO# QUARTE MUSTAR RAGWEE P-WEED FOXTAI CORN CORN R | | INCORP INFO# RATE % PION. PION. T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL OTHER YIELD # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 ASSESS T/HA ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0D 0D 0C 0C 0B 19.0 3.6C 2 1 1 F FOE-5043 0.488 58WG 48C 44BC 75B 51B 63A 20.0 4.9B F ISOXAFLUTOLE WG 3 1 1 F FOE-5043 0.61 58WG 58BC 45BC 83AB 73A 70A 19.8 4.9B F ISOXAFLUTOLE WG 4 1 1 F FOE-5043 0.976 58WG 65AB 64AB 91AB 79A 73A 19.7 5.6AB F ISOXAFLUTOLE WG 5 1 1 F FOE-5043 1.22 58WG 75A 53ABC 98A 88A 74A 19.8 6.1A F ISOXAFLUTOLE WG 6 1 1 F FOE-5043 0.488 58WG 66AB 74AB 93AB 81A 70A 19.5 6.1A F ISOXAFLUTOLE WG T ATRAZINE 0.8 90WG 7 1 1 F FOE-5043 0.61 58WG 69AB 78A 83AB 74A 64A 19.2 6.6A F ISOXAFLUTOLE WG T ATRAZINE 0.8 90WG 8 1 1 ATRAZINE 0.8 90WG 60ABC 65AB 93AB 76A 64A 19.1 5.7AB 9 1 1 T METOLACHLOR 1.92 93.5EC 70AB 33C 99A 78A 73A 19.4 6.0A T DICAMBA 0.6 48SN 16.8LSD 30.4LSD 20.0LSD 21.0LSD 18.0LSD NFS 0.93LSD 5% 5% 5% 5% 5% 5% 11.5SE 20.8SE 13.7SE 14.4SE 12.3SE 0.70SE 0.64SE 20.3CV 41.3CV 17.3CV 21.7CV 20.2CV 3.57CV 11.6CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980708 980708 980708 980708 980708 981013 981013 LEAF RANGE 13-20 18-25 10-19 9 -14 10-24 HEIGHT (CM) 24-77 64-80 21-46 22-37 26-50 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 26 6.3 2.3 12.5 11 -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -CGC; DICAMBA -BAZ; FOE-5043 -CHH; ISOXAFLUTOLE (EXP 31130A) -CHH; METOLACHLOR -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 PE CO2 SPRAYER 0.5 16 83 3 98/05/12 0945 14 0 4 49 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PION. 3) |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: FOE 5043/AMS13414 PROVIDED POOR FULL SEASON CONTROL OF LAMB'S-QUARTERS AND MUSTARD WITH FAIR CONTROL OF RAGWEED, PIGWEED, AND GREEN FOXTAIL. THERE WAS BETTER CONTROL OF PIGWEED WITH THE HIGHER RATE. THE ADDITION OF ATRAZINE RESULTED IN AN IMPROVEMENT IN THE CONTROL OF LAMB'S-QUARTERS, MUSTARD, AND PIGWEED. FOE 5043/AMS13414 PLUS ATRAZINE AND METOLACHLOR PLUS DICAMBA GENERALLY PROVIDED AN EQUIVALENT LEVEL OF WEED CONTROL WITH THE EXCEPTION OF MUSTARD WHICH WAS BETTER WITH THE FOE 5043/AMS13414 TANKMIXED WITH ATRAZINE. (SEE ALSO EXPERIMENT ID:CN98B1A, CN98B1C). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

87


EVALUATION OF FOE5043/AMS13414 APPLIED PREEMERGENCE IN CORN II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98B1C CROP: CORN, FIELD (PION. 3893). PLANTED: 98/05/06, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PION. 3893) EMERGED ON: 98/05/15. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS WILD COMMON GREEN R-ROOT WILD GREEN T | GROWTH ST INFO# QUARTE MUSTAR RAGWEE S-WEED P-WEED BUCKWH FOXTAI R | | INCORP INFO# RATE % T | | | KG/HA CONC PLANTS PLANTS PLANTS PLANTS PLANTS PLANTS PLANTS # V V V MIX MANAGEMENT (AI) #/SQ M #/SQ M #/SQ M #/SQ M #/SQ M #/SQ M #/SQ M------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 23.8AB 2.0A 0.5AB 0.0 15.3A 5.5 25.8AB 2 1 1 F FOE-5043 0.488 58WG 27.8A 1.0AB 0.8AB 0.0 9.0AB 4.0 23.0AB F ISOXAFLUTOLE WG 3 1 1 F FOE-5043 0.61 58WG 11.0BC 1.3AB 0.5AB 0.5 2.8B 4.3 16.8AB F ISOXAFLUTOLE WG 4 1 1 F FOE-5043 0.976 58WG 11.8BC 1.0AB 1.0A 0.0 4.8B 4.5 27.0AB F ISOXAFLUTOLE WG 5 1 1 F FOE-5043 1.22 58WG 5.8C 1.0AB 0.0B 0.8 1.3B 5.5 16.3B F ISOXAFLUTOLE WG 6 1 1 F FOE-5043 0.488 58WG 8.0C 1.3AB 0.3AB 0.0 2.8B 4.5 28.8A F ISOXAFLUTOLE WG T ATRAZINE 0.8 90WG 7 1 1 F FOE-5043 0.61 58WG 6.3C 0.8AB 0.5AB 0.3 5.5B 5.8 20.8AB F ISOXAFLUTOLE WG T ATRAZINE 0.8 90WG 8 1 1 ATRAZINE 0.8 90WG 5.3C 0.5B 1.0A 0.0 7.3B 5.5 22.5AB 9 1 1 T METOLACHLOR 1.92 93.5EC 8.0C 1.5AB 0.5AB 0.0 2.8B 4.3 23.8AB T DICAMBA 0.6 48SN 15.6LSD 1.49LSD 0.93LSD NFS 7.97LSD NFS 12.3LSD 5% 5% 5% 5% 5% 10.7SE 1.02SE 0.64SE 0.52SE 5.46SE 2.57SE 8.45SE 89.3CV 89.7CV 115 CV 310 CV 95.9CV 52.8CV 37.2CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 1 1 1 1 1 1 1 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980723 980723 980723 980723 980723 980723 980723 LEAF RANGE HEIGHT (CM) GROWTH STAGE PLANT DENSITY (PL/SQ.M) -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -CGC; DICAMBA -BAZ; FOE-5043 -CHH; ISOXAFLUTOLE (EXP 31130A) -CHH; METOLACHLOR -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 PE CO2 SPRAYER 0.5 16 83 3 98/05/12 0945 14 0 4 49 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PION. 3) |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: . (SEE ALSO EXPERIMENT ID:CN98B1A, CN98B1B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

88


BROADLEAF WEED CONTROL IN CORN WITH PREEMERGENCE HERBICIDE APPLICATIONS ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98B2A CROP: CORN, FIELD (ZEN 8771). PLANTED: 98/05/09, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/08 AT 616 KG/HA PROD WITH 27-9 -16 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (ZEN 8771) EMERGED ON: 98/05/18. SITE DESCRIPTION: MATERIALS AND METHODS: ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS COMMON LAMBS COMMON R-ROOT LADYS T | GROWTH ST INFO# CORN CORN QUARTE RAGWEE QUARTE RAGWEE P-WEED THUMB R | | INCORP INFO# RATE % ZEN 87 ZEN 87 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0C 0E 0D 0D 0B 0C 2 1 1 ATRAZINE 1.5 90WG 0 0 62B 78C 45C 51C 99A 100A 3 1 1 DICAMBA 0.6 48SN 2 1 95A 95AB 92A 98A 100A 100A 4 1 1 F DICAMBA 1.8 40.1SP 0 0 95A 96AB 98A 97A 100A 100A F ATRAZINE SP 5 1 1 NAF-72 0.185 85.6WG 1 1 94A 83BC 71B 73B 100A 94B 6 1 1 F IMAZETHAPYR 0.665 40.5SU 1 0 81AB 40D 78B 50C 100A 95AB F ATRAZINE SU 7 1 1 T ISOXAFLUTOLE 0.105 75WG 1 0 99A 99A 92A 90A 100A 99A T ATRAZINE 1.063 90WG NFS NFS 24.3LSD 16.2LSD 12.0LSD 14.6LSD 0.80LSD 5.10LSD 5% 5% 5% 5% 5% 5% 1.0 SE 0.50SE 16.4SE 10.9SE 8.00SE 9.80SE 0.60SE 3.40SE 193 CV 241 CV 21.8CV 15.5CV 11.9CV 15.0CV 0.66CV 4.06CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980605 980617 980617 980617 980713 980713 980713 980713 LEAF RANGE 5 -5 7 -8 8 -9 8 -10 11-17 13-22 16-22 15-19 HEIGHT (CM) 17-26 40-46 5-17 5-14 64-104 66-76 74-84 34-42 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 25 25.8 13 22.3 1 1 -----------------------------------------------------------------------------------------------------------------------------------ATRAZINE -BAZ ( 4:1); ATRAZINE -CGC ( 2:1); ATRAZINE -CGC ( 7:1); ATRAZINE -CYC ( 6:1); DICAMBA -BAZ; IMAZETHAPYR (AC 263,499) -CYC; ISOXAFLUTOLE (EXP 31130A) -RPC; NAF-72 -DWE; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 PE CO2 SPRAYER 0.5 23 70 5 98/05/16 0730 13 0 5 45 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (ZEN 877) |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO STATISTICALLY SIGNIFICANT INJURY IN CORN WITH THE PREEMERGENCE HERBICIDE TREATMENTS EVALUATED. ATRAZINE PROVIDED EXCELLENT CONTROL OF PIGWEED AND LADY'S THUMB BUT POOR CONTROL OF LAMB'S-QUARTERS AND RAGWEED. NAF-72 PROVIDED EXCELLENT CONTROL OF PIGWEED AND LADY'S THUMB BUT FAIR CONTROL OF LAMB'S-QUARTERS AND RAGWEED. IMAZETHAPYR/ATRAZINE PROVIDED EXCELLENT CONTROL OF PIGWEED AND LADY'S THUMB, FAIR CONTROL OF LAMB'S-QUARTERS AND POOR CONTROL OF RAGWEED. DICAMBA, DICAMBA/ATRAZINE, AND ISOXAFLUTOLE PLUS ATRAZINE ALL PROVIDED EXCELLENT CONTROL OF LAMB'S-QUARTERS, RAGWEED, PIGWEED, AND LADY'S THUMB. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

89


WEED MANAGEMENT SYSTEMS IN CORN WITH PROSULFURON TANKMIXES II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98C1A CROP: CORN, FIELD (PION. 3893). PLANTED: 98/05/06, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PION. 3893) EMERGED ON: 98/05/15. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS WILD R-ROOT WILD GREEN T | GROWTH ST INFO# CORN CORN QUARTE MUSTAR P-WEED BUCKWH FOXTAI R | | INCORP INFO# RATE % PION 3 PION. T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0 0 0B 0B 0B 0B 0C 2 1 1 F METOLACHLOR 1.87 935EC 3 0 96A 100A 96A 89A 73B F BENOXACOR 3EC 2 2 T PROSULFURON 0.01 75WG 2 2 T DICAMBA 0.14 70WG 2 2 T AGRAL 90 0.2 SU 3 2 2 T PROSULFURON 0.01 75WG 2 0 96A 100A 100A 84A 89A T DPX 79406 0.025 25WG T DICAMBA 0.14 70WG 2 2 T AGRAL 90 0.2 SU 4 2 2 T DPX 79406 0.025 25WG 2 0 99A 100A 99A 83A 83A T DICAMBA 0.288 48SN T AGRAL 90 0.2 SU 5 2 2 T PROSULFURON 0.01 75WG 0 0 99A 100A 100A 93A 88A T NICOSULFURON 0.025 75WG T DICAMBA 0.14 70WG 2 2 T AGRAL 90 0.2 SU 6 2 2 T NICOSULFURON 0.025 75WG 3 0 99A 100A 99A 81A 85A T DICAMBA 0.288 48SN T AGRAL 90 0.2 SU NFS NFS 5.30LSD 0 LSD 4.90LSD 13.1LSD 6.80LSD 5% 5% 5% 5% 5% 2.00SE 0 SE 3.50SE 0 SE 3.30SE 8.70SE 4.50SE 134 CV 0 CV 4.28CV 0 CV 3.99CV 12.1CV 6.52CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980610 980702 980702 980702 980702 980702 980702 LEAF RANGE 6 -7 8 -10 10-17 7 -10 7 -11 12-14 5 -11 HEIGHT (CM) 37-43 89-120 30-50 57-80 27-48 13-39 19-32 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 16.3 3.5 4 2.3 17.5-----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; BENOXACOR -CGC; DICAMBA -BAZ; DPX 79406 -DUQ; METOLACHLOR -CGC; NICOSULFURON (DPX V9360) -DUQ; PROSULFURON (CGA-152005) -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 PE CO2 SPRAYER 2 16 83 3 98/05/12 1015 14 0 4 49 16 2 200 241 POST-E CO2 SPRAYER 2 22 66 0 98/05/29 0700 4 4 5 32 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PION. 3) | LAMBS QUARTE | WILD MUSTAR | COMMONRAGWEE | R-ROOTP-WEED | WILD BUCKWH | GREEN FOXTAI | 2 FIELD CORN (PION. 3) 5 5 5 24 29 26 | LAMBS QUARTE 4 4 4 2 4 3 11.3 | WILD MUSTAR 3 4 4 1 4 3 2.3 | COMMONRAGWEE 4 4 4 1 2 1 .75 | R-ROOTP-WEED 2 3 3 1 2 1 4 | WILD BUCKWH 1 2 1 2 3 2 2 | GREEN FOXTAI 5 5 5 3 4 3 33 |------------------------------------------------------------------------------------------------------------------------------------

90

CONCLUSIONS: THERE WAS NO STATISTICALLY SIGNIFICANT INJURY IN CORN WITH THE HERBICIDE TREATMENTS EVALUATED. PROSULFURON PLUS DICAMBA FOLLOWING A PREEMERGENCE APPLICATION OF METOLACHLOR PROVIDED EXCELLENT EARLY SEASON CONTROL OF LAMB'S-QUARTERS, MUSTARD, AND REDROOT PIGWEED, WITH GOOD CONTROL OF WILD BUCKWHEAT. THE CONTROL OF GREEN FOXTAIL WITH METOLACHLOR WAS ONLY FAIR DUE TO LACK OF RAIN TO ACTIVATE THE HERBICIDE. THE TANKMIXES OF PROSULFURON PLUS DICAMBA WITH EITHER DPX 79406 OR NICOSULFURON PROVIDED EXCELLENT CONTROL OF LAMB'S-QUARTERS, MUSTARD AND REDROOT PIGWEED AND GOOD CONTROL OF WILD BUCKWHEAT AND GREEN FOXTAIL. (SEE ALSO EXPERIMENT ID:CN98C1B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

91


WEED MANAGEMENT SYSTEMS IN CORN WITH PROSULFURON TANKMIXES II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98C1B CROP: CORN, FIELD (PION. 3893). PLANTED: 98/05/06, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PION. 3893) EMERGED ON: 98/05/15. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: OTHER ASSESSMENT REFERS TO CROP MOISTURE AT HARVEST. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS WILD COMMON R-ROOT GREEN FIELD FIELD T | GROWTH ST INFO# QUARTE MUSTAR RAGWEE P-WEED FOXTAI CORN CORN R | | INCORP INFO# RATE % PION. PION. T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL OTHER YIELD # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 ASSESS T/HA ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0B 0B 0B 0C 0C 19.0 4.2B 2 1 1 F METOLACHLOR 1.87 935EC 94A 100A 100A 89B 82B 18.7 6.9A F BENOXACOR 3EC 2 2 T PROSULFURON 0.01 75WG 2 2 T DICAMBA 0.14 70WG 2 2 T AGRAL 90 0.2 SU 3 2 2 T PROSULFURON 0.01 75WG 95A 100A 100A 100A 95A 18.8 7.7A T DPX 79406 0.025 25WG T DICAMBA 0.14 70WG 2 2 T AGRAL 90 0.2 SU 4 2 2 T DPX 79406 0.025 25WG 98A 100A 100A 99A 95A 18.4 7.6A T DICAMBA 0.288 48SN T AGRAL 90 0.2 SU 5 2 2 T PROSULFURON 0.01 75WG 96A 100A 100A 98A 97A 19.0 7.8A T NICOSULFURON 0.025 75WG T DICAMBA 0.14 70WG 2 2 T AGRAL 90 0.2 SU 6 2 2 T NICOSULFURON 0.025 75WG 100A 100A 100A 100A 92A 19.0 7.6A T DICAMBA 0.288 48SN T AGRAL 90 0.2 SU 6.50LSD 0 LSD 0 LSD 8.00LSD 5.20LSD NFS 0.93LSD 5% 5% 5% 5% 5% 5% 4.30SE 0 SE 0 SE 5.30SE 3.50SE 0.55SE 0.61SE 5.37CV 0 CV 0 CV 6.55CV 4.52CV 2.91CV 8.83CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980729 980729 980729 980729 980729 981013 981013 LEAF RANGE 14-19 5 -5 10-12 11-13 5 -23 HEIGHT (CM) 116-122 66-182 25-102 69-112 51-88 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 15 1.5 1 3.5 16.8 -----------------------------------------------------------------------------------------------------------------------------------AGRAL 90 -CHP; BENOXACOR -CGC; DICAMBA -BAZ; DPX 79406 -DUQ; METOLACHLOR -CGC; NICOSULFURON (DPX V9360) -DUQ; PROSULFURON (CGA-152005) -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 PE CO2 SPRAYER 2 16 83 3 98/05/12 1015 14 0 4 49 16 2 200 241 POST-E CO2 SPRAYER 2 22 66 0 98/05/29 0700 5 4 5 32 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PION. 3) | LAMBS QUARTE | WILD MUSTAR | COMMONRAGWEE | R-ROOTP-WEED | WILD BUCKWH | GREEN FOXTAI | 2 FIELD CORN (PION. 3) 5 5 5 24 29 26 | LAMBS QUARTE 4 4 4 2 4 3 11.3 | WILD MUSTAR 3 4 4 1 4 3 2.3 | COMMONRAGWEE 4 4 4 1 2 1 .75 | R-ROOTP-WEED 2 3 3 1 2 1 4 | WILD BUCKWH 1 2 1 2 3 2 2 | GREEN FOXTAI 5 5 5 3 4 3 33 |------------------------------------------------------------------------------------------------------------------------------------

92

CONCLUSIONS: PROSULFURON PLUS DICAMBA FOLLOWING A PREEMERGENCE APPLICATION OF METOLACHLOR PROVIDED EXCELLENT FULL SEASON BROADLEAF WEED CONTROL AND GOOD CONTROL OF GREEN FOXTAIL. THE TANKMIXES OF PROSULFURON PLUS DICAMBA WITH EITHER DPX 79406 OR NICOSULFURON PROVIDED EXCELLENT FULL SEASON CONTROL OF THE WEEDS IN THIS TRIAL. THE LEVEL OF CONTROL WAS EQUIVALENT TO THE TANKMIXES WITH THE HIGH RATE OF DICAMBA. THE HERBICIDE TREATMENTS DID NOT HAVE AN AFFECT ON CORN MATURITY. THERE WAS NO DIFFERENCE IN CORN YIELD AMONG THE HERBICIDE TREATMENTS EVALUATED. CORN YIELDS WERE INCREASED SIGNIFICANTLY WITH THE USE OF HERBICIDES COMPARED TO THE WEEDY CHECK. (SEE ALSO EXPERIMENT ID:CN98C1A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

93


BROADLEAF WEED CONTROL IN CORN WITH ATRAZINE/2,4-D II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98C3A CROP: CORN, FIELD (PION. 3893). PLANTED: 98/05/07, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PION. 3893) EMERGED ON: 98/05/16. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS WILD COMMON R-ROOT GREEN T | GROWTH ST INFO# CORN CORN QUARTE MUSTAR RAGWEE P-WEED FOXTAI R | | INCORP INFO# RATE % PION. PION. T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0B 0 0C 0C 0C 0C 0E 2 1 1 F ATRAZINE 1.404 39SP 0B 0 100A 100A 95A 100A 81C F 2,4-D ESTER SP 3 1 1 T RIMSULFURON 0.015 25WG 0B 0 49B 100A 90AB 100A 85BC 1 1 T ACTIVATOR 90 0.2 SU 4 1 1 PENDIMETHALIN 1.68 40EC 0B 0 93A 69B 99A 94B 78C 5 1 1 F ATRAZINE 1.404 39SP 0B 0 100A 100A 100A 100A 80C F 2,4-D ESTER SP T RIMSULFURON 0.015 25WG T ACTIVATOR 90 0.2 SU 6 1 1 F ATRAZINE 1.404 39SP 0B 0 99A 100A 100A 100A 80C F 2,4-D ESTER SP T PENDIMETHALIN 1.68 40EC 7 1 1 F ATRAZINE 1.404 39SP 1AB 0 99A 100A 100A 100A 80C F 2,4-D ESTER SP T RIMSULFURON 0.013 25WG T PENDIMETHALIN 1 40EC T ACTIVATOR 90 0.2 SU 8 2 2 F ATRAZINE 1.404 39SP 0B 0 99A 100A 100A 100A 66D F 2,4-D ESTER SP 9 2 2 T DPX 79406 0.025 25WG 0B 0 44B 100A 95A 100A 94A T ACTIVATOR 90 0.2 SU10 2 2 T NICOSULFURON 0.025 75WG 1AB 0 55B 100A 70B 100A 91AB T ACTIVATOR 90 0.2 SU11 2 2 F ATRAZINE 1.404 39SP 1A 0 100A 100A 99A 100A 90AB F 2,4-D ESTER SP T DPX 79406 0.025 25WG T ACTIVATOR 90 0.2 SU12 2 2 F ATRAZINE 1.404 39SP 1AB 0 95A 100A 100A 100A 84BC F 2,4-D ESTER SP T NICOSULFURON 0.025 75WG T ACTIVATOR 90 0.2 SU 1.00LSD NFS 22.4LSD 11.6LSD 20.8LSD 1.00LSD 8.70LSD 5% 5% 5% 5% 5% 5% 0.70SE 0 SE 15.5SE 8.00SE 14.4SE 0.70SE 6.00SE 249 CV 0 CV 20.0CV 9.01CV 16.5CV 0.79CV 7.94CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980505 980624 980624 980624 980624 980624 980624 LEAF RANGE 6 -7 7 -10 9 -13 6 -10 8 -10 6 -12 5 -9 HEIGHT (CM) 27-36 64-83 12-29 15-55 11-25 12-24 16-23 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 3.8 3.3 1 1 25.8-----------------------------------------------------------------------------------------------------------------------------------2,4-D ESTER -UAP; ACTIVATOR 90 -UAP; ATRAZINE -UAP; DPX 79406 -DUQ; NICOSULFURON (DPX V9360) -DUQ; PENDIMETHALIN -CYC; RIMSULFURON (DPX-E-9636) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 POST-E CO2 SPRAYER 0.5 26 60 0 98/05/20 0915 0 4 4 41 16 2 200 241 POST-E CO2 SPRAYER 0.5 23 35 8 98/05/26 1820 4 4 0.6 35 16

94

------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PION. 3) 2 2 2 11 13 12 | WILD MUSTAR 3 4 4 1 2 1 5.25 | LAMBS QUARTE 2 2 2 1 2 1 1.25 | COMMONRAGWEE 4 4 4 1 2 1 0.75 | R-ROOTP-WEED | GREEN FOXTAI 2 2 2 1 2 1.5 12.0 | 2 FIELD CORN (PION. 3) 4 4 4 18 20 19 | WILD MUSTAR 5 6 6 2 3 2 4.0 | LAMBS QUARTE 4 4 4 2 2 2 4.5 | COMMONRAGWEE 4 4 4 2 3 2 1.25 | R-ROOTP-WEED 3 6 4 1 2 2 1.5 | GREEN FOXTAI 3 4 3 2 3 3 26.2 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO STATISTICALLY SIGNIFICANT INJURY IN CORN WITH THE HERBICIDE TREATMENTS EVALUATED. ATRAZINE\2,4-D PROVIDED EXCELLENT EARLY SEASON CONTROL OF LAMB'S-QUARTERS, WILD MUSTARD, COMMON RAGWEED, AND PIGWEED AT BOTH APPLICATION TIMINGS. THE CONTROL OF GREEN FOXTAIL DECREASED AS THE APPLICATION TIMING WAS DELAYED. THE TANKMIXES OF ATRAZINE/2,4-D PLUS RIMSULFURON OR PENDIMETHALIN PROVIDED EXCELLENT BROADLEAF WEED CONTROL AND GOOD CONTROL OF GREEN FOXTAIL. THE TANKMIXES OF ATRAZINE/2,4-D PLUS DPX 79406 OR NICOSULFURON BOTH PROVIDED EXCELLENT BROAD SPECTRUM EARLY SEASON WEED CONTROL. (SEE ALSO EXPERIMENT ID:CN98C3B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

95


BROADLEAF WEED CONTROL IN CORN WITH ATRAZINE/2,4-D II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98C3B CROP: CORN, FIELD (PION. 3893). PLANTED: 98/05/07, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (PION. 3893) EMERGED ON: 98/05/16. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: OTHER ASSESSMENT REFERS TO CROP MOISTURE AT HARVEST. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS WILD COMMON R-ROOT WILD GREEN FIELD FIELD T | GROWTH ST INFO# QUARTE MUSTAR RAGWEE P-WEED BUCKWH FOXTAI CORN CORN R | | INCORP INFO# RATE % PION. PION. T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL OTHER YIELD # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 ASSESS T/HA ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0E 0C 0C 0C 0C 0D 18.5 5.4D 2 1 1 F ATRAZINE 1.404 39SP 100A 100A 100A 100A 100A 67BC 18.7 7.1ABC F 2,4-D ESTER SP 3 1 1 T RIMSULFURON 0.015 25WG 39D 100A 95A 99A 69B 75AB 18.9 6.7BC 1 1 T ACTIVATOR 90 0.2 SU 4 1 1 PENDIMETHALIN 1.68 40EC 83AB 60B 95A 97B 82AB 81A 18.4 6.4CD 5 1 1 F ATRAZINE 1.404 39SP 99A 100A 100A 100A 100A 81A 18.3 7.6ABC F 2,4-D ESTER SP T RIMSULFURON 0.015 25WG T ACTIVATOR 90 0.2 SU 6 1 1 F ATRAZINE 1.404 39SP 100A 100A 100A 100A 96A 80A 18.6 7.4ABC F 2,4-D ESTER SP T PENDIMETHALIN 1.68 40EC 7 1 1 F ATRAZINE 1.404 39SP 100A 100A 100A 100A 94A 81A 18.5 7.8AB F 2,4-D ESTER SP T RIMSULFURON 0.013 25WG T PENDIMETHALIN 1 40EC T ACTIVATOR 90 0.2 SU 8 2 2 F ATRAZINE 1.404 39SP 100A 100A 100A 100A 99A 63C 18.0 7.4ABC F 2,4-D ESTER SP 9 2 2 T DPX 79406 0.025 25WG 46CD 100A 93AB 100A 88AB 84A 18.0 7.8AB T ACTIVATOR 90 0.2 SU10 2 2 T NICOSULFURON 0.025 75WG 69BC 100A 81B 100A 86AB 79A 18.1 7.9AB T ACTIVATOR 90 0.2 SU11 2 2 F ATRAZINE 1.404 39SP 100A 100A 99A 100A 100A 81A 18.4 7.2ABC F 2,4-D ESTER SP T DPX 79406 0.025 25WG T ACTIVATOR 90 0.2 SU12 2 2 F ATRAZINE 1.404 39SP 100A 100A 100A 100A 100A 75AB 19.3 8.1A F 2,4-D ESTER SP T NICOSULFURON 0.025 75WG T ACTIVATOR 90 0.2 SU 24.5LSD 18.9LSD 11.8LSD 1.40LSD 21.7LSD 11.0LSD NFS 1.28LSD 5% 5% 5% 5% 5% 5% 5% 17.0SE 13.1SE 8.20SE 1.00SE 15.1SE 7.60SE 0.75SE 0.88SE 21.8CV 14.8CV 9.26CV 1.06CV 17.8CV 10.8CV 4.04CV 12.3CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980723 980723 980723 980723 980723 980723 981013 981013 LEAF RANGE 12-17 3 -4 5 -13 5 -12 12-34 9 -12 HEIGHT (CM) 36-82 46-49 45-82 26-64 2-3 64-69 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 11.8 1.5 1.3 2.3 1.8 42.5 -----------------------------------------------------------------------------------------------------------------------------------2,4-D ESTER -UAP; ACTIVATOR 90 -UAP; ATRAZINE -UAP; DPX 79406 -DUQ; NICOSULFURON (DPX V9360) -DUQ; PENDIMETHALIN -CYC; RIMSULFURON (DPX-E-9636) -DUQ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 POST-E CO2 SPRAYER 0.5 26 60 0 98/05/20 0915 0 4 4 41 16 2 200 241 POST-E CO2 SPRAYER 0.5 23 35 8 98/05/26 1820 4 4 0.6 35 16

96

------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (PION. 3) 2 2 2 11 13 12 | WILD MUSTAR 3 4 4 1 2 1 5.25 | LAMBS QUARTE 2 2 2 1 2 1 1.25 | COMMONRAGWEE 4 4 4 1 2 1 0.75 | R-ROOTP-WEED | GREEN FOXTAI 2 2 2 1 2 2 12.0 | 2 FIELD CORN (PION. 3) 4 4 4 18 20 19 | WILD MUSTAR 5 6 6 2 3 2 4.0 | LAMBS QUARTE 4 4 4 2 2 2 4.5 | COMMONRAGWEE 4 4 4 2 3 2 1.25 | R-ROOTP-WEED 3 6 4 1 2 1 1.5 | GREEN FOXTAI 3 4 3 2 3 3 26.2 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: ATRAZINE/2,4-D PROVIDED EXCELLENT FULL SEASON CONTROL OF LAMB'S-QUARTERS, WILD MUSTARD, COMMON RAGWEED, PIGWEED, AND WILD BUCKWHEAT AT BOTH APPLICATION TIMINGS AND FAIR CONTROL OF GREEN FOXTAIL. THE TANKMIXES OF ATRAZINE/2,4-D PLUS RIMSULFURON OR PENDIMETHALIN PROVIDED EXCELLENT BROADLEAF WEED CONTROL AND GOOD CONTROL OF GREEN FOXTAIL. THE TANKMIXES OF ATRAZINE/2,4-D PLUS DPX 79404 OR NICOSULFURON BOTH PROVIDED EXCELLENT FULL SEASON BROADLEAF WEED CONTROL AND GOOD CONTROL OF GREEN FOXTAIL. CONSISTENT WITH RESULTS FROM OTHER EXPERIMENTS DPX 79406 PROVIDES SLIGHTLY BETTER GREEN FOXTAIL CONTROL THAN NICOSULFURON. (SEE ALSO EXPERIMENT ID:CN98C3A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

97


BROADLEAF WEED CONTROL IN CORN WITH POSTEMERGENCE HERBICIDES ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98C4A CROP: CORN, FIELD (ZEN 8771). PLANTED: 98/05/09, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/05/08 AT 616 KG/HA PROD WITH 27-9 -16 PREV CROPS: SOYBEAN (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: BAYFIELD, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (ZENECA 877) EMERGED ON: 98/05/18. SITE DESCRIPTION: MATERIALS AND METHODS: ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS COMMON R-ROOT LAMBS COMMON R-ROOT T | GROWTH ST INFO# CORN CORN QUARTE RAGWEE P-WEED QUARTE RAGWEE P-WEED R | | INCORP INFO# RATE % ZEN 87 ZEN 87 T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK (WEEDY) 0E 0C 0G 0C 0B 0C 0E 0C 2 1 1 ATRAZINE 1.5 90WG 0E 3C 56F 98A 100A 58B 89AB 100A 3 1 1 DICAMBA 0.6 48SN 0E 3C 97A 99A 98A 93A 100A 100A 4 1 1 F DICAMBA 1.8 40.1SP 0E 0C 97A 99A 100A 100A 100A 100A F ATRAZINE SP 5 1 1 F ATRAZINE 1.404 39SP 1E 0C 94AB 96A 100A 90A 94A 100A F 2,4-D ESTER SP 6 1 1 T BROMOXYNIL 0.28 28EC 5C 0C 90A-D 97A 100A 93A 93A 100A 1 1 T ATRAZINE 1.5 90WG 7 1 1 T PROSULFURON 0.01 75WG 1E 0C 93ABC 96A 96A 88A 95A 100A 1 1 T DICAMBA 0.14 70WG 1 1 T AGRAL 90 0.2 SU 8 1 1 T NAF-73 0.185 84.3WG 0E 0C 78B-E 90A 99A 80AB 84AB 100A 1 1 T AGRAL 90 0.25 SU 9 1 1 T DPX 79406 0.025 25WG 0E 0C 74C-F 61B 100A 60B 39CD 100A T AGRAL 90 0.25 SU10 1 1 F IMAZETHAPYR 0.665 40.5SU 3D 0C 85A-E 61B 100A 76AB 64BC 100A F ATRAZINE SU T AGRAL 90 0.2 SU T 28-00-00 FERT 2 SU11 1 1 GLYPHOSATE 0.9 35.6SN 100A 100A 68EF 92A 99A 13C 25DE 95B 12 1 1 GLUFOSINATE AMM 0.4 20SN 95B 85B 73DEF 92A 98A 13C 23DE 95B 1.30LSD 3.30LSD 18.8LSD 20.6LSD 4.70LSD 26.3LSD 26.8LSD 4.70LSD 5% 5% 5% 5% 5% 5% 5% 5% 0.90SE 2.30SE 13.0SE 14.3SE 3.30SE 18.2SE 18.6SE 3.30SE 5.25CV 14.4CV 17.4CV 17.5CV 3.59CV 28.7CV 27.8CV 3.59CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980605 980625 980625 980625 980625 980720 980720 980720 LEAF RANGE 5 -6 9 -11 8 -12 8 -11 8 -11 6 -15 7 -15 16-27 HEIGHT (CM) 22-24 88-96 19-23 13-26 16-35 10-99 33-100 89-126 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 13.8 14.8 1.3 11 15.3 1.3 -----------------------------------------------------------------------------------------------------------------------------------2,4-D ESTER -UAP; 28-00-00 FERT -OTH; AGRAL 90 -CHP; ATRAZINE -BAZ ( 4:1); ATRAZINE -CGC ( 2:1); ATRAZINE -CGC ( 6:1); ATRAZINE -CYC (10:1); ATRAZINE -UAP ( 5:1); BROMOXYNIL -RPC; DICAMBA -BAZ; DPX 79406 -DUQ; GLUFOSINATE AMMONIUM -CAX; GLYPHOSATE -MOL; IMAZETHAPYR (AC 263,499) -CYC; NAF-73 -DWE; PROSULFURON (CGA-152005) -CGC; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 POST-E CO2 SPRAYER 0.5 17 61 0 98/05/26 2000 4 4 0.6 35 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (ZEN 877) 4 4 4 18 20 19 | COMMONRAGWEE 2 2 2 2 2 2 13.5 | LAMBS QUARTE 2 2 2 1 3 2 19.7 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THIS TRIAL WAS CONDUCTED IN CONVENTIONAL CORN WHICH EXPLAINS THE HIGH LEVEL OF INJURY WITH GLYPHOSATE AND GLUFOSINATE. THERE WAS NO COMMERCIALLY SIGNIFICANT INJURY IN CORN WITH THE REMAINING POSTEMERGENCE HERBICIDE TREATMENTS EVALUATED. ATRAZINE PROVIDED EXCELLENT CONTROL OF PIGWEED, GOOD CONTROL OF RAGWEED AND POOR CONTROL OF LAMB'S-QUARTERS. PROSULFURON PLUS DICAMBA PROVIDED EXCELLENT CONTROL OF RAGWEED AND PIGWEED WITH GOOD CONTROL OF LAMB'S-QUARTERS. NAF-73 PROVIDED EXCELLENT CONTROL OF PIGWEED AND GOOD CONTROL OF RAGWEED AND LAMB'S-QUARTERS. IMAZETHAPYR PROVIDED EXCELLENT CONTROL OF PIGWEED AND FAIR CONTROL OF LAMB'S-QUARTERS AND RAGWEED. DICAMBA, DICAMBA/ATRAZINE, ATRAZINE/2,4-D AND BROMOXYNIL PLUS ATRAZINE ALL PROVIDED EXCELLENT CONTROL OF LAMB'S-QUARTERS, RAGWEED, AND PIGWEED. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

98


COMPARISON OF WEED CONTROL AND CROP TOLERANCE IN HERBICIDE RESISTANT CORN II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98RR1A CROP: CORN, FIELD (VARIOUS). PLANTED: 98/05/07, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: ALFALFA (95), BEAN, WHITE (96), WHEAT, SPRING (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (VARIOUS) EMERGED ON: 98/05/16. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: FIVE VARIETIES WERE COMPARED IN THIS TRIAL. THE FOLLOWING ARE THE VARIETIES BY TREATMENT. TREATMENT 1 - DEKALB 493, TREATMENT 2 - DEKALB 493RR, TREATMENT 3 - DEKALB 493GR, TREATMENT 4 - DEKALB 493SR, TREATMENT 5 - PIONEER 3751 IR. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD LAMBS WILD COMMON R-ROOT WILD GREEN T | GROWTH ST INFO# CORN CORN QUARTE MUSTAR RAGWEE P-WEED BUCKWH FOXTAI R | | INCORP INFO# RATE % VARIOU T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 1 1 F METOLACHLOR 2.88 72SU 0 0 68B 68B 100 88B 68B 74BC F ATRAZINE SU T DICAMBA 0.6 48SN 2 1 1 GLYPHOSATE 0.9 35.6SN 0 0 94A 99A 100 91B 96A 86A 2 2 GLYPHOSATE 0.9 35.6SN 3 1 1 GLUFOSINATE AMM 0.4 20SN 0 0 30C 94A 100 91B 94A 85AB 2 2 GLUFOSINATE AMM 0.4 20SN 4 1 1 T SETHOXYDIM 0.15 18.4EC 0 0 95A 91A 100 100A 98A 86A F DICAMBA 1.8 40.1SP F ATRAZINE SP T ASSIST 1 SU 5 1 1 F IMAZETHAPYR 0.665 40.5SU 0 0 88AB 88A 100 100A 78B 73C F ATRAZINE SU T PENDIMETHALIN 1.25 40EC NFS NFS 25.0LSD 11.9LSD NFS 8.40LSD 14.5LSD 12.3LSD 5% 5% 5% 5% 5% 0.20SE 0.20SE 16.2SE 7.70SE 0 SE 5.40SE 9.40SE 8.00SE 447 CV 447 CV 21.7CV 8.78CV 0 CV 5.77CV 10.9CV 9.90CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980615 980709 980709 980709 980709 980709 980709 980709 LEAF RANGE 8 -9 11-13 12-21 5 -9 4 -10 7 -16 12-19 5 -14 HEIGHT (CM) 35-40 113-136 30-50 34-76 6-15 14-37 6-10 24-40 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 8 1.5 1 4.25 2.5 19.5-----------------------------------------------------------------------------------------------------------------------------------ASSIST -BAZ; ATRAZINE -BAZ ( 4:1); ATRAZINE -CGC ( 1:1); ATRAZINE -CYC ( 5:1); DICAMBA -BAZ; GLUFOSINATE AMMONIUM -CAX; GLYPHOSATE -MOL; IMAZETHAPYR (AC 263,499) -CYC; METOLACHLOR -CGC; PENDIMETHALIN -CYC; SETHOXYDIM -BAZ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 PE CO2 SPRAYER 0.5 16 83 3 98/05/12 0800 14 0 4 49 16 2 200 241 POST-E CO2 SPRAYER 0.5 13 47 9 98/05/22 0810 0 4 4 39 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (VARIOUS) | FIELD CORN (VARIOUS) 3 3 3 12 15 13 | GREEN FOXTAI 2 3 2 1 2 1 61.2 | LAMBS QUARTE 4 4 4 1 1 1 2.25 | WILD MUSTAR 4 5 4 1 2 1 2 | R-ROOTP-WEED 3 3 3 1 1 1 4 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THERE WAS NO INJURY IN CONVENTIONAL, ROUND UP READY, LIBERTY LINK, POAST PROTECTED AND IMI SMART CORN WITH THE HERBICIDE TREATMENTS EVALUATED. THE LEVEL OF WEED CONTROL WITH METOLACHLOR/ATRAZINE PLUS DICAMBA APPLIED PREEMERGENCE WAS NOT THAT GOOD SINCE THERE WAS VERY LITTLE RAIN TO ACTIVATE THE HERBICIDES. THE POSTEMERGENCE APPLICATIONS OF GLYPHOSATE, GLUFOSINATE, SETHOXYDIM PLUS DICAMBA/ATRAZINE AND IMAZETHAPYR/ATRAZINE PLUS PENDIMETHALIN ALL PROVIDED GOOD TO EXCELLENT EARLY SEASON WEED CONTROL WITH THE EXCEPTION OF GLUFOSINATE WHICH WAS WEAK ON LAMB'S-QUARTERS. (SEE ALSO EXPERIMENT ID:CN98RR1B). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

99


COMPARISON OF WEED CONTROL AND CROP TOLERANCE IN HERBICIDE RESISTANT CORN II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98RR1B CROP: CORN, FIELD (VARIOUS). PLANTED: 98/05/07, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: ALFALFA (95), BEAN, WHITE (96), WHEAT, SPRING (97). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (VARIOUS) EMERGED ON: 98/05/16. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: FIVE VARIETIES WERE COMPARED IN THIS TRIAL. FOLLOWING ARE THE VARIETIES BY TREATMENT. TREATMENT 1 - DEKALB 493, TREATMENT 2 - DEKALB 493RR, TREATMENT 3 - DEKALB 493GR, TREATMENT 4 - DEKALB 493SR, TREATMENT 5 - PIONEER 3751IR. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# LAMBS WILD R-ROOT WILD GREEN T | GROWTH ST INFO# QUARTE MUSTAR P-WEED BUCKWH FOXTAI R | | INCORP INFO# RATE % T | | | KG/HA CONC VISUAL VISUAL VISUAL VISUAL VISUAL # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 0-100 0-100 ------------------------------------------------------------------------------------------------------------------------------------ 1 1 1 F METOLACHLOR 2.88 72SU 76A 69 81B 13C 90 F ATRAZINE SU T DICAMBA 0.6 48SN 2 1 1 GLYPHOSATE 0.9 35.6SN 100A 99 96A 100A 83 2 2 GLYPHOSATE 0.9 35.6SN 3 1 1 GLUFOSINATE AMM 0.4 20SN 45B 100 100A 90A 83 2 2 GLUFOSINATE AMM 0.4 20SN 4 1 1 T SETHOXYDIM 0.15 18.4EC 98A 96 100A 90A 90 F DICAMBA 1.8 40.1SP F ATRAZINE SP T ASSIST 1 SU 5 1 1 F IMAZETHAPYR 0.665 40.5SU 95A 96 100A 53B 89 F ATRAZINE SU T PENDIMETHALIN 1.25 40EC 24.7LSD NFS 9.80LSD 22.9LSD NFS 5% 5% 5% 16.0SE 20.3SE 6.30SE 14.9SE 6.90SE 19.4CV 22.1CV 6.64CV 21.5CV 7.91CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980805 980805 980805 980805 980805 LEAF RANGE 12-17 5 -6 8 -13 16-25 7 -22 HEIGHT (CM) 79-162 65-83 62-87 5-33 45-95 GROWTH STAGE PLANT DENSITY (PL/SQ.M) 12.5 1.8 3.5 1.3 19.5-----------------------------------------------------------------------------------------------------------------------------------ASSIST -BAZ; ATRAZINE -BAZ ( 4:1); ATRAZINE -CGC ( 1:1); ATRAZINE -CYC ( 5:1); DICAMBA -BAZ; GLUFOSINATE AMMONIUM -CAX; GLYPHOSATE -MOL; IMAZETHAPYR (AC 263,499) -CYC; METOLACHLOR -CGC; PENDIMETHALIN -CYC; SETHOXYDIM -BAZ; ------------------------------------------------------------------------------------------------------------------------------------ APPLICATION INFORMATIONAPPL SOL VOL TOT SPR PRES APPLICATION HT TEMP HUMID WIND RAINFALL (MM/WK) 1ST SIG. RAININFO# L/HA L/HA KPA TIMING METHOD M C % KM/HR DATE TIME BEFORE AFTER SECOND DAYS MM------------------------------------------------------------------------------------------------------------------------------------ 1 200 241 PE CO2 SPRAYER 0.5 16 83 3 98/05/12 0800 14 0 4 49 16 2 200 241 POST-E CO2 SPRAYER 0.5 13 47 9 98/05/22 0810 0 4 4 39 16------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------ 1 FIELD CORN (VARIOUS) | FIELD CORN (VARIOUS) 3 3 3 12 15 13 | GREEN FOXTAI 2 3 2 1 2 1 61.2 | LAMBS QUARTE 4 4 4 1 1 1 2.25 | WILD MUSTAR 4 5 4 1 2 1 2 | R-ROOTP-WEED 3 3 3 1 1 1 4 |------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: THE LEVEL OF WEED CONTROL WITH METOLACHLOR/ATRAZINE PLUS DICAMBA APPLIED PREEMERGENCE WAS QUITE VARIABLE SINCE THERE WAS VERY LITTLE RAIN TO ACTIVATE THE PREEMERGENCE HERBICIDES. THE SEQUENTIAL APPLICATION OF GLYPHOSATE PROVIDED EXCELLENT BROADLEAF WEED CONTROL AND GOOD CONTROL OF GREEN FOXTAIL. THE SEQUENTIAL APPLICATION OF GLUFOSINATE PROVIDED GOOD TO EXCELLENT WEED CONTROL WITH THE EXCEPTION OF LAMB'S-QUARTERS. THE TANKMIX OF SETHOXYDIM PLUS DICAMBA/ATRAZINE PROVIDED EXCELLENT BROADLEAF AND GRASS CONTROL. THE TANKMIX OF IMAZETHAPYR/ATRAZINE PLUS PENDIMETHALIN PROVIDED EXCELLENT WEED CONTROL WITH THE EXCEPTION OF WILD BUCKWHEAT. (SEE ALSO EXPERIMENT ID:CN98RR1A). (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

100


COMPARISON OF CROP POTENTIAL IN HERBICIDE RESISTANT CORN II ECW/EDI-2.4SIKKEMA P H, COWAN A T EXPERIMENT ID: CN98RR2A CROP: CORN, FIELD (VARIOUS). PLANTED: 98/05/07, 75000 SE/HA, 5 CM DEEP, 75 CM ROW WIDTH. PLANTING METHOD: PRECISION PLANTER. FERT BROADCAST ON 98/04/28 AT 350 KG/HA PROD WITH 43-6 -0 PREV CROPS: WHEAT, SPRING (97), BEAN, WHITE (96), ALFALFA (95). FIELD EXPT. EXPT DESIGN: RANDOMIZED COMPLETE BLOCK. REPS: 4. PLOT SIZE: 2 X 8M. PLOT AREA: 16 SQ M. CROP ZONE: 999. EXPT LOCATION: EXETER, ON. WEATHER STN: CENTRALIA A, ON. ACTUAL PPT(MM): APR: 37.8, MAY: 43.2, JUN: 36.4, JUL: 49.4, AUG: 118, SEP: 30.2.ACTUAL TEMP(C): APR: 7.7, MAY: 17, JUN: 19, JUL: 21, AUG: 21, SEP: 18. CORN, FIELD (VARIOUS) EMERGED ON: 98/05/16. SITE DESCRIPTION: %OM: 5, %SAND: 29, %SILT: 37, %CLAY: 34, SOIL PH: 8. MATERIALS AND METHODS: FIVE VARIETIES WERE COMPARED IN THIS TRIAL. THIS TRIAL WAS MAINTAINED WEED FREE. EACH TREATMENT WAS INDICATED AS BEING A WEED FREE TREATMENT, FOLLOWING IS THE LIST OF CORN HYBRIDS THAT GO WITH EACH TREATMENT. TREATMENT 1 - DEKALB 493, TREATMENT 2 - DEKALB 493RR, TREATMENT 3 - DEKALB 493GR, TREATMENT 4 - DEKALB 493SR, TREATMENT 5 - PIONEER 3751IR. PRIMEXTRA LIGHT AT 5.8 L/HA PLUS FIELDSTAR AT 216 G/HA WERE APPLIED PREEMERGENCE FOR WEED CONTROL. 1 PASS WITH THE ROW CULTIVATOR WAS USED AND SOME HAND HOEING TO MAINTAIN WEED FREE. ------------------------------------------------------------------------------------------------------------------------------------ APPL INFO# FIELD FIELD FIELD FIELD FIELD T | GROWTH ST INFO# CORN CORN CORN CORN CORN R | | INCORP INFO# RATE % VARIOU VARIOU VARIOU VARIOU VARIOU T | | | KG/HA CONC VIGOUR VIGOUR VIGOUR OTHER YIELD # V V V MIX MANAGEMENT (AI) 0-100 0-100 0-100 ASSESS T/HA ------------------------------------------------------------------------------------------------------------------------------------ 1 CHECK,WEED FREE 0 0 0 22.8 10.1A 2 CHECK,WEED FREE 1 0 0 22.6 10.8A 3 CHECK,WEED FREE 0 0 0 23.5 9.9A 4 CHECK,WEED FREE 0 0 0 22.4 8.6B 5 CHECK,WEED FREE 0 0 0 24.5 10.6A NFS NFS NFS NFS 1.19LSD 5% 0.40SE 0 SE 0 SE 0.99SE 0.77SE 447 CV 0 CV 0 CV 4.26CV 7.71CV ------------------------------------------------------------------------------------------------------------------------------------ SAMPLE SIZE (SQ.M) 16 16 16 16 16 NUMBER OF SAMPLES 1 1 1 1 1 DATE ASSESSED (YYMMDD) 980525 980601 980615 981013 981013 LEAF RANGE 3 -3 5 -6 7 -8 HEIGHT (CM) 16-18 24-27 41-47 GROWTH STAGE PLANT DENSITY (PL/SQ.M) ----------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------GROWTH GROWTH STAGE INFORMATION | INCORPORATION INFORMATIONSTAGE BBCH ZADOKS LEAF HEIGHT (CM) GROWTH DENS | INCORP DEPINFO# PLANT (VARIETY) MN MX MN MX MN MX MJ MN MX MJ STAGE PL/M2 | INFO# DATE TYPE CM------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CONCLUSIONS: CONVENTIONAL DK 493, DK 493 ROUNDUP READY, DK 493 LIBERTY LINK, DK 493 POAST PROTECTED AND IMI SMART PIONEER 3751 CORN WAS MAINTAINED WEED FREE IN THIS EXPERIMENT TO DETERMINE IF THERE WAS ANY DECREASE IN VIGOUR OR YIELD ASSOCIATED WITH INCORPORATING THESE GENES INTO CORN. NO DIFFERENCE IN CROP VIGOUR OR MATURITY WAS OBSERVED AMONG THE FIVE CORN HYBRIDS EVALUATED. NO YIELD DRAG WAS ASSOCIATED WITH THE ROUNDUP READY OR LIBERTY LINK GENE IN THIS TRIAL. THE DK 493 SR HYBRID HAD A LOWER YIELD THAN THE OTHER CORN HYBRIDS. (COLLEGE OF AGRICULTURAL TECHNOLOGY, RIDGETOWN).

Documents

CONTROL OF WEEDS IN CORN (FIELD AND SWEET) …€¦ · planted: 98/05/15, 75600 se/ha, 5 cm deep, 75 cm row width. planting method: precision planter. fert broadcast on 98/05/13 at