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Dr. Don Hershman

dhershma@uky.edu

Soybean and Wheat Diseases

P.O. Box 469

Princeton, KY  42445

(270) 365-7541 ext. 215

 

 The following is a compilation of several notes on wheat fungicides from Dr. Don Hershman, Extension Plant Pathologist.

 

 NCR-184

Management of Small Grain Diseases

 

Fungicide Efficacy for Control of Wheat Diseases

 

The North Central Regional Committee on Management of Small Grain Diseases has developed the following information on fungicide efficacy for control of certain foliar diseases of wheat for use by the grain production industry in the U. S.   Efficacy ratings for each fungicide listed in the following table were determined by field testing the materials over multiple years and locations by the members of the committee.  Efficacy is based on proper application timing to achieve optimum effectiveness of the fungicide as determined by labeled instructions and overall level of disease in the field at the time of application. Differences in efficacy among fungicide products were determined by direct comparisons among products in field tests and are based on a single application of the labeled rate as listed in the table. 

 

Efficacy of fungicides for wheat disease control based on appropriate application timing.

Product

Fungicide(s)

 

Rate/A

Powdery mildew

Stagonospora

leaf/glume blotch

Septoria leaf blotch

Tan

spot

Stripe rust

Leaf rust

Head

scab

Tilt

3.6 EC

Propiconazole 41.8%

4 fl. oz.

+++*

+++

+++

+++

+++

+++

+

PropiMax

3.6 EC

Propiconazole 41.8%

4 fl. oz.

+++

+++

+++

+++

+++

+++

+

Quadris

2.08 SC

Azoxystrobin 22.9%

6.2 (to 10.8) fl. oz.

+(+)**

+++

+++

++++

++++

++++

 

Quilt

200SC

Azoxystrobin 7.0%

Propiconazole 11.7%

14  fl. oz.

+++

+++

+++

+++

+++

+++

 

Stratego

250 EC

Propiconazole 11.4%

Trifloxystrobin 11.4%

10.0 fl. oz.

++

+++

+++

+++

+++

++

 

Headline

2.09 EC

Pyraclostrobin 23.6%

6.0 (to 9.0) fl. oz.

++

+++

+++

++++

++++

++++

 

Folicur

3.6 EC***

Tebuconazole 38.7%

4.0 fl. oz.

++

+++

+++

+++

++++

++++

++

* the greater the number of + signs the greater the relative efficacy

** (+) indicates greater efficacy at higher application rates.

*** Folicur does not have a federal label, but may have Section 18 emergency registration in some states.

 

This information is provided only as a guide.  It is the responsibility of the pesticide applicator by law to read and follow all current label directions.  No endorsement is intended for products listed, nor is criticism meant for products not listed.  Members of NCR-184 assume no liability resulting from the use of these products.

 

 

 

Federal Fungicide Label Restrictions and Usage on Wheat

(Revised 2004)

 

Tilt 3.6 EC (Propiconazol), Syngenta Crop Protection, Inc.

1) Tilt can be applied by ground, air and chemigation.

2) Federal label restricts application through growth stage 8 (flag leaf emergence).

1) Do not apply more than 4 fl. oz. of Tilt per acre per season

2) Do not graze or feed livestock treated wheat forage or cut the green crop for hay or silage.

3) After harvest, the straw may be used for bedding or feed.

 

PropiMax 3.6 EC (propiconazole), Dow AgroSciences, LLC.

1) PropiMax can be applied by ground, air or chemigation.

2) Federal label restricts application through growth stage 8 (flag leaf emergence).

3) Do not apply more than 4 fl. oz. of PropiMax per acre per season

4) Do not apply within 40 days of harvest

5) Do not graze or feed livestock treated wheat forage or cut the green crop for hay or silage.

6) After harvest, the straw may be used for bedding or feed.

 

Quadris Flowable Fungicide 2.08 F (Azoxystrobin), Syngenta Crop Protection, Inc.

1) Do not make more than two applications of Quadris or other strobilurin fungicides per acre per year.

2) Apply between Feekes growth stage 6 and 10.5, DO NOT apply later than 10.5.

3) Applications may be made by air, ground or chemigation.

4) Add a crop oil concentrate (1.0%, v/v) to optimize efficacy

5) Do not harvest treated wheat for forage.

6) Do not apply more than 12.32 oz product per acre per season.

7) Do not apply within 14 days of harvest for hay

8) Do not apply within 45 days of harvest for grain and straw

 

Quilt Fungicide 200SC (Azoxystrobin 7.0%, Propiconazole 11.7%) Syngenta

1) Quilt may be applied by ground, air and chemigation.

2) Quilt may be applied up to Feekes growth stage 9 (flag leaf fully expanded).

3) Do not apply more than 2 applications/A/year.

4) Applications may be made no closer than a 14-day interval

5) Do not apply within 45 days of harvest for grain or straw

6) Do not harvest wheat for forage

7) Do not graze or feed livestock treated forage or cut green crop for hay or silage.

8) Do not apply more than 20.5 fl oz/A/season of Quilt

9) Soybeans may be planted as a double corp following a cereal crop which has been treated with quilt.  Do not use hay, forage, or fodder from the soybean crop as any component of animal feed or bedding.

 

Cereal Fungicide Equivalents

 

Source:  Marcia McMullen

 

in lb ai/ac or oz/ac

 

 

 

NDSU Extension Plant Pathologist

Quilt Active Ingredient Breakout

Quilt

propiconazole

 

propiconazole

Tilt equivalent

azoxystrobin

azoxystrobin

Quadris equivalent

rate

amt. in Quilt

 

amt. in Quilt

 

amt. in Quilt

amt. in Quilt

 

oz/ac

lb a.i./ac

 

oz/ac

oz/ac

lb a.i./ac

oz/ac

oz/ac

 

 

 

 

 

 

 

 

7

0.057

 

0.91

2.02

0.034

0.54

2.17

14

0.114

 

1.82

4.04

0.069

1.1

4.34

20.5

0.167

 

2.7

5.9

0.099

1.6

6.36

Quilt label restrictions: Do not apply more than 20.5 oz/ac/yr of Quilt.  Do not apply more than 0.167 lb a.i./ac/yr of a propiconazole product.  Do not apply more than 0.4 lb a.i./ac/yr of a  azoxystrobin product.

  

Stratego Active Ingredient Breakout

Stratego

propiconazole

 

propiconazole

Tilt

trifloxystrobin

trifloxystrobin

Gem

rate

amt. in Stratego

 

amt. in Stratego

 equivalent

amt. in Stratego

amt. in Stratego

 Equivalent

oz/ac

lb a.i./ac

 

oz/ac

oz/ac

lb a.i./ac

oz/ac

oz/ac

 

 

 

 

 

 

 

 

5

0.041

 

0.66

1.44

0.041

0.66

2.6

10

0.082

 

1.31

2.88

0.081

1.3

5.2

20

0.164

 

2.62

5.76

0.162

2.6

10.4

Stratego label restrictions:  Do not apply more than 20 oz/ac/yr of Stratego.  Do not make more than 2 applications of Stratego or other strobilurin fungicide/yr.

 

Quadris Active Ingredient

Quadris

azoxystrobin

oz/ac

lb a.i./ac

 

 

6.2

0.097

7.7

0.12

10.8

0.167

Quadris label restrictions: Do not apply more than 0.4 lb a.i./ac/yr of this product.

 

Tilt Active Ingredient

Tilt

propiconazole

oz/ac

lb a.i./ac

 

 

2

0.056

4

0.113

Tilt label restrictions: Do not apply more than 4 fl oz/ac/yr of Tilt.

Generics of propiconazole also available: Bumper, Contend, Propimax.

 

Headline Active  Ingredient

Headline

Pyraclostrobin

oz/a

lb ai/ac

3

0.049

6

0.098

9

0.147

Headline label restrictions: Do not apply more than 18 oz/a/yr Do not make more than 2 applications of Headline or other strobilurin fungicide/yr.

 

Folicur Active Ingredient

Folicur

tebuconazole

oz/ac

lb a.i./ac

4

0.113

Folicur label restrictions: Sec. 18 product for Fusarium head blight suppression.

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