Small Grain Insect situations:
- in general, the survey is finding low infestation levels. Reports from SW MN wheat fields indicate larger populations, which often leads to migrations further north. Wheat fields are most susceptible to aphid feeding prior to heading.
- Wheat stem maggot infested stems are indicated by a white wheat head, that when pulled upward cleanly separates the stalk from the plant, revealing the chewed area where the maggot has cut the stem.
Small Grain Disease situations:
- BYDV and Aster yellows infections result in similar symptoms in wheat plants. The reports here are assessing visual appearance only and can not definitively distinguish the two without diagnostic tests conducted in the lab.
- to access Leaf rust forecasting models, follow the link to the Minnesota Association of Wheat Growers small grain disease modeling
- Pockets of stripe rust are continuing to be found across the region, with the disease showing up primarily in areas that have had more rain, but detections are still hit and miss in a region. Stripe rust symptoms have been seen in winter and spring wheat fields. The fungus that causes stripe rust (Puccinia striiformis) prefers cool, wet conditions. Disease development is most rapid at temperatures between 50 and 65°F accompanied by intermittent rain or dew. Temperatures above 90°F can kill the fungus. The high temperatures of June 9th certainly prevented sporulation and infection, and the winds of June 11th dried out canopies, so there probably wasn’t any spread of the disease then, but there may still be risk of further infection this week with cooler temperatures and continued chance of showers predicted. Continue to scout fields for the presence and distribution of this disease because of its irregular occurrence. All of the registered triazole based fungicides will provide very good control if the disease is detected and common in a field.
- there are no current maps for FHB, however, the forecast risk model can be accessed for assisting in making management decisions for small grains as they approach susceptible growth stages.
View regional maps summarizing current observations in
Wheat and Barley
View aphid reports on presence and population levels for northwest Minnesota based on field scouting reports.
--- under development ---
The Minnesota Association of Wheat Growers has assembled numerous links to resources available on the web that relate to small grain production. At this time, we suggest you access their resources.
They can be found here
WWW-F0-02547, UMN Extension
PP-1361, NDSU Extension Service