G89-936 Russian Wheat Aphid

The Russian wheat aphid is a serious insect threat to small grains. Its description, damage and control are discussed here. The Russian wheat aphid (RWA) is a serious insect threat to wheat and other small grains. Growers should examine small grain fields regularly for this pest throughout the fall. In the spring, weekly examinations are needed from the time wheat resumes growth through the late heading stages. Farmers are encouraged to collect samples of unknown aphids on small grains and have them identified by the Cooperative Extension Service. Proper identification of the aphid is critical in determining the need for insecticidal controls. Even a relatively few RWA may justify treatment costs.