Effects of Nutrient Management and Fungicides on Soybeans in Southern Illinois

Ebelhar et al., 2005

Effects of Nutrient Management and Fungicides on Soybeans in Southern Illinois

S. A. Ebelhar, and C. D. Hart

Ebelhar et al., 2005

OBJECTIVESDetermine the effects of potassium, chloride, boron and manganese nutrition on the response of soybeans to diseases (possibly including Asian soybean rust)

Evaluate the nutrient interaction effects with and without the application of fungicides

Compare these effects across Roundup Ready and conventional herbicide programs.

Ebelhar et al., 2005

Soil Tests (ppm), 2005DSAC pH P K Ca Mg

0-6” 6.8 64 184 2105 90

6-12” 7.0 8 66 1964 81

12-18” 7.0 26 60 1960 81

18-24” 7.0 13 61 1858 88

BARC

0-6” 6.3 82 154 1436 94

6-12” 6.1 20 48 1305 80

12-18” 5.9 23 75 1246 171

18-24” 6.3 12 70 1426 374

Ebelhar et al., 2005

Soil Tests (ppm), 2005DSAC % OM S Mn Cl B CEC

0-6” 2.7 9.8 38 86 1.3 12.4

6-12” 2.5 6.5 26 92 1.4 10.9

12-18” 2.5 3.8 25 96 1.3 10.7

18-24” 2.5 8.3 24 92 1.1 10.4

BARC

0-6” 2.9 9.8 41 30 0.8 9.8

6-12” 2.4 9.3 22 33 0.5 9.1

12-18” 1.5 18.3 10 41 0.4 10.3

18-24” 1.2 39.3 5 60 0.4 12.1

Ebelhar et al., 2005

Treatment Effects on Yield, 2005

0

10

20

30

40

50

60

BARC DSAC

Yie

ld (b

u/ac

re)

Check + K2SO4 + KCl

+ KCl + B + KCL + Mn + KCl + B + Mn

NS NS

Ebelhar et al., 2005

Variety and Fungicide Effects on Yield, 2005

0

10

20

30

40

50

60

BARC DSAC

Yie

ld (b

u/ac

re)

94B54 4502 94B53 - Fung. + Fung.

a ** NS NS

b b

Ebelhar et al., 2005

02468

101214161820

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Week after planting

Pre

cipit

ati

on (

inch

es)

Precipitation 30-yr Avg.

Rainfall after Planting and Foliar Applications, Dixon Springs, 2005

Planted 5/25

Mn & B (7/1)

Fung. & Mn & B (7/19)

5/4

Ebelhar et al., 2005

02468

101214161820

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Week after planting

Pre

cipit

ati

on (

inch

es)

Precipitation 30-yr Avg.

Rainfall after Planting and Foliar Applications, Brownstown, 2005

Planted 5/4

Mn & B (7/5)

Fung. & Mn & B (7/15)

5/4

Ebelhar et al., 2005

Treatment Effects on Soybean Injury, 2005

0

1

2

3

4

5

BARC DSAC

Inju

ry (0

-5 S

cale

)

Check + K2SO4 + KCl

+ KCl + B + KCL + Mn + KCl + B + Mn

*** ***

Ebelhar et al., 2005

Variety and Fungicide Effects on Soybean Injury, 2005

0

1

2

3

4

5

BARC DSAC

Inju

ry (0

-5 S

cale

)

94B54 4502 94B53 - Fung. + Fung.

a b b *** NS NS

Ebelhar et al., 2005

Variety x Fungicide Effects on Frogeye Leaf Spot, DSAC, 2005

0

1

2

3

4

5

6

DSAC

Eye

s per

trifo

liate

94B54 -F 94B54 +F 4502 -F 4502 +F 94B53 -F 94B53 +F

Var: a b b

Fung ***

Ebelhar et al., 2005

Treatment Effects on Soybean Trifoliate Leaf N Conc., 2005

0

1

2

3

4

5

BARC DSAC

% L

eaf N

utri

ent

Check + K2SO4 + KCl

+ KCl + B + KCL + Mn + KCl + B + Mn

* NS

Ebelhar et al., 2005

Variety and Fungicide Effects on Soybean Leaf N Conc., 2005

0

1

2

3

4

5

BARC DSAC

% L

eaf N

utri

ent

94B54 4502 94B53 - Fung. + Fung.

b a a NS b a a NS

Ebelhar et al., 2005

Treatment Effects on Soybean Trifoliate Leaf K Conc., 2005

0

1

2

3

4

5

BARC DSAC

% L

eaf N

utri

ent

Check + K2SO4 + KCl

+ KCl + B + KCL + Mn + KCl + B + Mn

NS *

Ebelhar et al., 2005

Variety and Fungicide Effects on Soybean Leaf K Conc., 2005

0

1

2

3

4

5

BARC DSAC

% L

eaf N

utri

ent

94B54 4502 94B53 - Fung. + Fung.

b a b * b a b NS

Ebelhar et al., 2005

Treatment Effects on Soybean Trifoliate Leaf Ca Conc., 2005

0

1

2

3

4

5

BARC DSAC

% L

eaf N

utri

ent

Check + K2SO4 + KCl

+ KCl + B + KCL + Mn + KCl + B + Mn

NS NS

Ebelhar et al., 2005

Variety and Fungicide Effects on Soybean Leaf Ca Conc., 2005

0

1

2

3

4

5

BARC DSAC

% L

eaf N

utri

ent

94B54 4502 94B53 - Fung. + Fung.

c b a *** b b a NS

Ebelhar et al., 2005

Treatment Effects on Soybean Trifoliate Leaf S Conc., 2005

0

0.1

0.2

0.3

0.4

0.5

BARC DSAC

% L

eaf N

utri

ent

Check + K2SO4 + KCl

+ KCl + B + KCL + Mn + KCl + B + Mn

NS NS

Ebelhar et al., 2005

Variety and Fungicide Effects on Soybean Leaf S Conc., 2005

0

0.1

0.2

0.3

0.4

0.5

BARC DSAC

% L

eaf N

utri

ent

94B54 4502 94B53 - Fung. + Fung.

c a b NS b a a NS

Ebelhar et al., 2005

Treatment Effects on Soybean Trifoliate Leaf B Conc., 2005

0

10

20

30

40

50

60

70

BARC DSAC

ppm

Lea

f Nut

rien

t

Check + K2SO4 + KCl

+ KCl + B + KCL + Mn + KCl + B + Mn

*** ***

Ebelhar et al., 2005

Variety and Fungicide Effects on Soybean Leaf B Conc., 2005

0

10

20

30

40

50

60

70

BARC DSAC

ppm

Lea

f Nut

rien

t

94B54 4502 94B53 - Fung. + Fung.

NS *** b b a NS

Ebelhar et al., 2005

Treatment Effects on Soybean Trifoliate Leaf Mn Conc., 2005

0

30

60

90

120

150

180

BARC DSAC

ppm

Lea

f Nut

rien

t

Check + K2SO4 + KCl

+ KCl + B + KCL + Mn + KCl + B + Mn

*** ***

Ebelhar et al., 2005

Variety X Treatment Effects on Soybean Trifoliate Leaf Mn Conc., DSAC, 2005

0

60

120

180

240

300

360

94B54 4502 94B53

ppm

Lea

f Nut

rien

t

Check + K2SO4 + KCl

+ KCl + B + KCL + Mn + KCl + B + Mn

Ebelhar et al., 2005

Variety and Fungicide Effects on Soybean Leaf Mn Conc., 2005

0

30

60

90

120

150

180

BARC DSAC

ppm

Lea

f Nut

rien

t

94B54 4502 94B53 - Fung. + Fung.

NS *** b b a NS

Ebelhar et al., 2005

SUMMARYFoliar application of B and Mn increased the leaf composition of B and Mn, respectively, and caused some injury to the soybean plants but had no effect on yield.Disease pressure was low, but was affected by variety choice and by fungicide treatment, but not fertilizer treatment at Dixon Springs.Fungicide application at Brownstown caused some leaf injury and slightly reduced yields.