Foliar Fungicide Efficacy Ratings for Wheat Disease Management 2021
Published April, 2021.
The North Central Regional Committee on Management of Small Grain Diseases (NCERA-184) 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 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. Table includes most widely marketed products and is not intended to be a list of all labeled products.
Efficacy of Fungicides for Wheat Disease Control Based on Appropriate Application Timing
A table key and summary can be found below.
Stagonospora Leaf / Glume Blotch
Septoria Tritici Blotch
Head Scab (4)
|Class||Active Ingredient||Product||Rate/A (fl. oz)|
|Strobilurin||Picoxystrobin 22.5%||Aproach SC||6.0-12.0||G (1)||VG||VG (2)||VG||E (3)||VG||VG||NL||Feekes 10.5|
|Pyraclostrobin 3.6%||Headline SC||6.0-9.0||G||VG||VG (2)||E||E (3)||E||G||NL||Feekes 10.5|
|Azoxystrobin 22.9%||Quadris 2.08 SC||4.0-12.0 (5)||G||VG (2)||VG (2)||E||E (3)||E||VG||NL||Feekes 10.5.4|
|Triazole||Metconazole 8.6%||Caramba 0.75 SL||10.0-17.0||VG||VG||--||VG||E||E||E||G||30 days|
|Tebuconazole 38.7%||Folicur 3.6 F (6)||4.0||NL||NL||NL||NL||E||E||E||F||30 days|
|Prothioconazole 41%||Proline 480 SC||5.0-5.7||--||VG||VG||VG||VG||VG||VG||G||30 days|
|Prosaro 421 SC||6.5 - 8.2||G||VG||VG||VG||E||E||E||G||30 days|
|Propiconazole 41.8%||Tilt 3.6 EC (6)||4.0||VG||VG||VG||VG||VG||VG||VG||P||Feekes 10.5.4|
|Mixed Modes of Action (7)||Tebuconazole 22.6%
|Absolute Maxx SC||5.0||G||VG||VG||VG||VG||E||VG||NL||35 days|
|Aproach Prima SC||3.4-6.8||VG||VG||VG||VG||E||VG||--||NR||45 days|
|Delaro 325 SC||8.0||G||VG||VG||VG||VG||VG||VG||NL||Feekes 10.5 and
|Miravis Ace SE||13.7||VG||VG||VG||VG||VG||VG||VG||G (8)||Feeks 10.5.4|
|Nexicor EC||7.0-13.0||VG||VG||E||E||E||E||VG||NL||Feeks 10.5|
|Fluxapyroxad 14.3% Pyraclostrobin 28.6%||Priaxor||4.0-8.0||G||VG||VG||E||VG||VG||G||NL||Feeks 10.5|
|Quilt Xcel 2.2 SE (6)||10.5-14.0||VG||VG||VG||VG||E||E||VG||NL||Feeks 10.5.4|
|Stratego YLD||4.0||G||VG||VG||VG||VG||VG||VG||NL||Feekes 10.5 and 35 days|
|Trivapro SE||9.4-13.7||VG||VG||VG||VG||E||E||VG||NL||Feeks 10.5.4|
|Topguard EQ||4.0-7.0||VG||NL||VG||VG||E||E||VG||NL||Feeks 10.5.4, 30 days|
- Efficacy Categories
- NL = Not Labeled
- NR = Not Recommended
- P = Poor
- F = Fair
- G = Good
- VG = Very Good
- E = Excellent
- none = Insufficient data to make statement about efficacy of this product
- Product efficacy may be reduced in areas with fungal populations that are resistant to strobilurin fungicides.
- Efficacy may be significantly reduced if solo strobilurin products are applied after stripe rust infection has occurred.
- Application of products containing strobilurin fungicides may result in elevated levels of the mycotoxin Deoxynivalenol (DON) in grain damaged by head scab.
- Label rate for powdery mildew is 7.5-11.0 fl. oz/A.
- Multiple generic products containing the same active ingredients also may be labeled in some states.
- Products with mixed modes of action generally combine triazole and strobilurin active ingredients. Nexicor, Priaxor and Trivapro include carboxamide active ingredients.
- Based on application timing at the beginning of anthesis (Feekes 10.5.1)
The Efficacy of Fungicides for Wheat Disease Control Based on Appropriate Application Timing table contains data that is arranged in rows and columns. There are 2 primary sections, found in row 1; fungicides and disease types. In row 2, fungicides are broken into class, active ingredient, product, and application rate. Each cell in row 3 and below, when read from left-to-right, describes a fungicide followed by its efficacy results for different small grains diseases and harvest restriction in the final column. An index is provided below the table.
It is the responsibility of the pesticide applicator by law to read and follow all current label directions.
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. Brand names appearing in this publication are for product identification purposes only. No endorsement is intended for products listed, nor is criticism meant for products not listed. Members of NCERA-184 Committee assume no liability resulting from the use of these products. Persons using such product assume responsibility of their use in accordance with current label directions of the manufacturer.
To learn more about fungicides or other management strategies for diseases control in pulse crops, contact MSU Extension specialist Dr. Uta McKelvy. For help with identifying crop disorders, contact your local extension agent or the Schutter Diagnostic Lab at Montana State University.
A downloadable PDF version of this table will be available shortly.