The soybean aphid, Aphis glycines, is one of the most important insect pests of soybeans in Ohio. While soybean aphid resistant cultivars have been developed, data suggests different aphid populations, or "biotypes", can feed and cause damage on these resistant lines. Successful deployment of aphid resistance genes depends on using them in areas where the aphid is less likely to overcome resistance. However, the distribution of soybean aphid biotypes is unknown and impedes efforts to manage this pest through host-plant resistance.

The research will result in a much needed biotype distribution map of aphids in Ohio and determine the resistant cultivars that will provide the most effective...