Northwest Research and Outreach Center

Northwest Research and Outreach Center
2900 University Ave.
Crookston, MN 56716
Phone: 218-281-8604
Fax: 218-281-8603
quirk010@umn.edu

June 18 to 22, 2012

Survey area includes fields in Minnesota and North Dakota. Select the links to view maps and related resources.

Wheat Fields Surveyed and Crop Stage



Small Grain Insect situations:

Cereal Aphids 

- 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

- 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:

Bacterial Leaf blight incidence

Barley Yellow Dwarf Virus

- 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.

Leaf Rust-Incidence and Severity

- to access Leaf rust forecasting models, follow the link to the Minnesota Association of Wheat Growers small grain disease modeling

Loose Smut incidence

Stem Rust Incidence  - new map

Wheat Septoria SPP Incidence and Severity

- Septoria forecasting model

Stripe Rust incidence

- 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.

Tan Spot incidence and severity

- Tan spot forecasting model

Powdery Mildew

Wheat Streak Mosaic Virus

 

Fusarium Head Blight - Scab Severity Index for Zadok >70

- 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.

Soybean aphid Survey

View aphid reports on presence and population levels for northwest Minnesota based on field scouting reports.

Small Grain Survey

View regional maps summarizing current observations in
Wheat and Barley


Small Grain Management Resources

--- 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





Growth and Development Guide for Spring Wheat

WWW-F0-02547, UMN Extension

Rust Disease of Wheat in North Dakota

PP-1361, NDSU Extension Service