The North Central Regional Committee on Management of Small Grain Diseases (NCERA-184) has developed the following information for use by the grain production industry in the United States.

Efficacy ratings for each fungicide listed in the table were determined by field testing the materials over multiple years and locations in Kansas. They were verified by the members of NCERA-184 for the management of small grain diseases.

Efficacy is based on proper application timing needed to achieve optimum effectiveness of the fungicide as deter- mined 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

The table below 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.  Rows, when read from left-to-right, describe a fungicide, followed by its efficacy results, and in the final column is harvest restriction.  Key provided below table.

Fungicide(s)

Powdery Mildew

Stagonospora Leaf
/ Glume Blotch

Septoria Leaf blotch

Tan spot

Stripe Rust

Leaf Rust

Stem Rust

 

Head Scab (4)

Harvest
Restriction
Class Active Ingredient Product Rate/A (fl. oz)
Strobilurin Picoxystrobin 22.5% Aproach SC 6.0-12 G (1) VG VG (2) VG E (3) VG VG NL Feekes 10.5
Pyraclostrobin 3.6% Headline 2.09 EC 6.0-9.0 G VG (2) VG (2) E E (3) E G NL Feekes 10.5
Triazole Metconazole 8.6% Caramba 0.75 SL 10.0-17.0 VG VG -- VG E E E G 30 days
Prothioconazole 41% Proline 480 SC 5.0-5.7 -- VG VG VG VG VG VG G 30 days
Tebuconazole 38.7% Folicur 3.6 F (5) 4.0 NL NL NL NL E E E F 30 days
Prothioconazole 19%
Tebuconazole 19%		 Prosaro 421 SC 6.5 - 8.2 G VG VG VG E E E G 30 days
Propiconazole 41.8% Tilt 3.6 EC (5) 4.0 VG VG VG VG VG VG VG P Feekes 10.5
Mixed Modes of Action (6) Tebuconazole 22.6%
Trifloxystrobin 22.6%		 Absolute Maxx SC 5.0 G VG VG VG VG E VG NL 35 days
Cyproconazole 7.17%
Picoxystrobin 17.94%		 Aproach Prima SC 3.4-6.8 VG VG VG VG E VG -- NR 45 days
Prothioconazole 16.0%
Trifloxystrobin 13.7%		 Delaro 325 SC 8.0 G VG VG VG VG VG VG NL Feekes 10.5 and
35 days
Propiconazole 11.4%
Pydiflumetofen 13.7%		 Miravis Ace SE 13.7 VG VG VG VG VG VG VG G (7) Feeks 10.5.4
Fluxapyroxad 2.8%
Pyraclostrobin 18.7%
Propiconazole 11.7%		 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 E E VG NL Feeks 10.5
Propiconazole 11.7%
Azoxystrobin 13.5%		 Quilt Xcel 2.2 SE (5) 10.5-14.0 VG VG VG VG E E VG NL Feeks 10.5
Prothioconazole 10.8%
Trifloxystrobin 32.3%		 Stratego YLD 4.0 G VG VG VG VG VG VG NL Feekes 10.5 and 35 days
Flutriafol 18.63%
Azoxystrobin 25.30%		 Topguard EQ 4.0-7.0 VG NL VG VG E E VG NL Feeks 10.5.4, 30 days
Benzovindiflupyr 2.9%
Propiconazole 11.9%
Azoxystrobin 10.5%		 Trivapro SE 9.4-13.7 VG VG VG VG E E VG NL Feeks 10.5.4

Table Key

  1. 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
  2. Product efficacy may be reduced in areas with fungal populations that are resistant to strobilurin fungicides.
  3. Efficacy may be significantly reduced if solo strobilurin products are applied after stripe rust infection has occurred.
  4. Application of products containing strobilurin fungicides may result in elevated levels of the mycotoxin Deoxynivalenol (DON).
  5. Multiple generic products containing the same active ingredients also may be labeled in some states.
  6. Products with mixed modes of action generally combine triazole and strobilurin active ingredients. Nexicor, Priaxor and Trivapro include carboxamide active ingredients.
  7. Based on application timing at the beginning of anthesis (Feekes 10.5.1)

 

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. 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.

Brand names appearing in this publication are for product identification purposes only. No endorsement is intended, nor is criticism implied of similar products not mentioned. Persons using such products assume responsibility for their use in accordance with current label directions of the manufacturer.

Foliar Fungicide Efficacy Ratings for Wheat Disease Management 2020 (180KB PDF)

 

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