Wheat Stem Sawfly is still infesting wheat in northwest Minnesota. Areas affected last year are now showing symptoms of this year’s infestations. Wheat stems are lodging as the sawfly larvae cut the base of the stem. Polk County is the area of greatest concentration, but reports beyond the Crookston area are also coming in.
We are asking ALL wheat growers in the northwest region to report on if they find lodged stems, their location (Latitude-Longitude or Legal description), and some estimate of cut stems per row foot. Also, indicate where in the field (usually the edge, but how far in is useful knowledge). We are trying to determine how big an area is impacted by this insect.
To continue reading, view page: http://blog-crop-news.extension.umn.edu/2018/07/look-for-wheat-stem-sawfly-in-nw-mn.html
Source: University of Minnesota Extension