Small Grain Disease Forecasting Model



August 5, 2014

Over the past two weeks, the IPM scouts surveyed 181 wheat fields. Tan spot was the most prevalent flag leaf disease being documented in nearly every field. Scab was reported in 23% of the wheat fields with scab index (incidence x severity) ratings ranging from 0.02 to 56. Wheat flowering during the last part of June and early July were at greatest risk for scab development. In the past week, prolonged moisture periods, moderate temperatures, and moderate to high relative humidity elevated the risk of scab on susceptible varieties across the northern tier of the state. Additionally, susceptible wheat varieties flowering in the southeast corner of the state were in moderate to high scab risk as well. Wheat growth stages vary across the state with some fields in the boot stage. Use the scab forecasting models for flowering wheat to determine if a fungicide application is needed. More IPM survey information can be found at IPM Survey

If you have any questions, contact the Department of Plant Pathology, NDSU, Fargo, ND 58105 (701-231-7627).

Dr. Andrew Friskop, Cereal Extension Pathologist
Phone # 701-231-7627

Away from your computer?

Current forecasts are also available by telephone. Call toll free for a recorded update from any touch-tone phone in MN or ND

(Service not available in SD and Man)


(231-6601 in Fargo area)

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Small Grain Disease Forecasting Model

Close up of wheat field bannerThe NDSU Small Grains Disease Forecasting Model assists producers in estimating the possibility of disease in their crops and gives recommendations as to possible preventative applications and times for these applications. This is done in conjunction with NDAWN weather station locations within North Dakota and sections of western Minnesota and eastern Montana.

As easy as 1-2-3

NDAWN logo
1.  Click on the NDAWN station location nearest you
  - see NDAWN Home Page for a station location map
2.  Click the button representing the growth stage of your crop
  - see the growth stage information for explanations of growth stages
  - click on the small image to see a larger image
  - select the Flowering growth stage to access the scab forecast
  - or see NDAWN's estimated growth stage for your crop based on planting date.
3.  Click "Get Forecast".

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