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Cultural Controls of Wheat Stem Sawfly Other Than Tillage
Growers who opt not to use solid stem (resistant) wheat could consider delayed planting as a means of reducing sawfly damage. However, in most cases this is not practiced because seeding must be delayed until after mid-May, which is beyond the time when a normal yield can be expected most years. The yield reduction due to delayed planting could be greater than the actual loss from sawflies. If weather conditions should create a situation where planting is delayed until mid-May, the crop may escape sawfly damage.
Crop rotation is helpful in reducing sawfly populations because crops such as oats, flax, canola, sunflower, safflower, corn and beans are not susceptible to sawfly infestation. Barley and winter rye are hosts that allow only a small number of larvae to survive. Most seasons, winter wheat will mature before the sawfly has time to reach maturity and emerge, so this crop normally escapes infestation.
More information on the wheat stem sawfly can be found in NDSU Extension Service publication E-680 at http://www.ext.nodak.edu/extpubs/plantsci/smgrains/e680w.htm
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