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Evaluation Of New Venturi Nozzle Designs For Improving Herbicide Efficacy. Robert Wolf Biological and Agricultural Engineering Dept. Dallas Peterson Department of Agronomy. Nozzle Efficacy/Drift Slope. 1980. 30 years. XR, TR Turbo Flood Turbo TeeJet Air Mix AI XR GuardianAir AI - PowerPoint PPT Presentation
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Evaluation Of New Venturi Nozzle Designs For Improving Herbicide
Efficacy
Robert Wolf Biological and Agricultural Engineering Dept.
Dallas Peterson Department of Agronomy
NOZZLE EFFICACY/DRIFT SLOPE
XR, TR
Turbo Flood Turbo TeeJet
Air Mix AI XR GuardianAir
AI Ultra Low Drift Turbo Drop
TTI
Extended Range
Chamber Design
Venturi Design - I
Venturi Design - II
Nozzle development timeline
NEW TEST NOZZLES
Turbo TwinJet
AI XR TeeJet
GuardianAir - Hypro
NEW TEST NOZZLES
Air Mix & TDHSTF- Greenleaf
Leckler
OBJECTIVE
The objective of this study was to evaluate herbicide efficacy comparing multiple nozzle types designed to reduce drift while maintaining adequate efficacy.
Ashland Bottoms Agronomy
Research Station
MATERIALS AND METHODS
Experiment: Agronomy Farm Ashland Field PlotsDesign: 2008 - 8 x 2 RCB with split plot and 3 reps Design: 2009 - 9 x 2 RCB with split plot and 3 reps Main plot: HerbicideSubplots:Spray tip by pressurePlot Size:3 x 9 mSpecies 2008: velvetleaf, common sunflower, sorghum, cornSpecies 2009: velvetleaf, ivyleaf morningglory, sorghum, cornVisual Ratings:28 days after treatment (DAT)Herbicides (2): Gramoxone Inteon, 0.42 kg ai/ha, NIS at 0.5% v/v
Roundup Power Max, 0.42 kg ae/ha, NPAC AMS @ 5.0% w/w
Spray Volume:70 l/ha (7.5 GPA)
MATERIALS AND METHODS
Speed: 16 km/h (10 MPH)
Tractor mounted 3-point sprayer3 meter boom with 4 tipsNozzle Spacing: 51 cmBoom Height: 51cm
MATERIALS AND METHODSTwin-fan IDK-T
Turbo Flat-fan (TT)AIXR Flat-fanAir Mix (AM)Guardian (GA)Turbo Twin Flat-fan (TTJ60)
AIC Flat-fanTDHSTFUltra Lo Drift (ULD)
*
**
*
*
PERCENT CONTROL BY NOZZLE TYPEGLYPHOSATE - 28 DAT
tt-40 aixr-40 aic-70 am-40 ga-40 tdhstf-70 ttj60-40 uld-70 idkt-280
10
20
30
40
50
60
70
80
90
100
Vele Sorg Corn Ilmg
% C
on
trol
a
c
abc
ab
abc
c
a
2009
a
a
abcabc
a a a aaa
a
bc
c
ab a
b
ab
bc
ab a
bab
bc
abc
abc
c
cc
cc
c
PERCENT CONTROL BY NOZZLE TYPEPARAQUAT - 28 DAT
tt-40 aixr-40 aic-70 am-40 ga-40 tdhstf-70
ttj60-40 uld-70 idk-280
10
20
30
40
50
60
70
80
90
100
Vele Sorg Corn Ilmg
% C
on
tro
l
c
c
b
de
ab
ab
de
abcd
2009
cd
ab
a
babc
a
c
c
c
c
b
c
cc
abcd
abcd
abc
b
e
ab abc b abc
bcd
ab
ab
abcd
ab
60.0
65.0
70.0
75.0
80.0
85.0
90.0
95.0
100.0
85.3 85.5
82.5 83.0 83.382.0 82.0 82.5
84.3
% Glyphosate Control Across Species by Nozzle Type
tt-40aixr-40aic-70am-40ga-40tdhstf-70ttj60-40uld-70idkt-28
Nozzle Type
Perc
en
t C
on
trol
50.0
55.0
60.0
65.0
70.0
75.0
80.0
85.0
90.0
95.0
100.0
66.25
69.8 70.3 69.066.3
67.8
73.8
67.5
72.0
% Paraquat Control Across Species by Nozzle Type
tt-40aixr-40aic-70am-40ga-40tdhstf-70ttj60-40uld-70idk-28
Nozzle Type
Pe
rce
nt
Co
ntr
ol
SUMMARY For glyphosate, the AIXR and TT had
best control. When comparing similar nozzle designs,
the twin-fan IDK-T performed better than the twin-fan TTJ60 and TDHSTF.
Within the new venturi designs, the AIXR outperformed the AM and GA.
For the old style venturi designs, the AIC and ULD performed the same.
SUMMARY For paraquat, the twin-fan TTJ60 had the best
control, followed by the IDK-T, also a twin-fan. The AIC was next, followed by the AIXR and the AM. The TDHSTF, ULD, TT, and the GA had the lowest
control. When comparing similar designs:
with the twin-fan designs, TTJ60 and IDK-T outperformed the TDHSTF.
with the single outlet, TT was outperformed by the double outlet TTJ60.
with the new style venturi designs, the AIXR and AM performed better than the GA.
For the old style venturi designs, the AIC performed better than the ULD.
CONCLUSIONS: For both years, species control varied
between glyphosate and paraquat. Differences in control with glyphosate across
nozzle and species had little differences. With paraquat, in both years mixed results
with some differences were found across all nozzle types and species.
In 2009, for the paraquat treatments, the broadleaf species control was much better than the grass species control.
How to use????
NOZZLES-RECOMMENDED USE
