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. After heading, it is rarely economical to treat for cereal aphids since infestations tend to decline rapidly and only test weight has the potential to be affected.
- 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. Faller has been particularly susceptible to stripe rust infections. 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. All of the registered triazole based fungicides will provide very good control if the disease is detected and common in a field.
- the first indication of scab infections are presented in this new map. Continue to reference the forecast risk model 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
--- 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