Title: Soybean aphid management, resistance, and outreach in the North Central Region
Comprehensive project details are posted online for three-years only, and final reports indefinitely. For more information on this project please contact this state soybean organization.
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Six states evaluated aphid resistant lines, and found that the Rag1+Rag2 gene pyramid suppresses aphids the most, and insecticidal seed treatment did not result in yield gain. The project was completed and the results have been submitted for a peer-reviewed journal article.Six states evaluated insecticidal seed treatment for aphid management. Data analysis is underway including an economic cost/benefit analysis. Regional screening for aphid populations resistant to thiamethoxam insecticide established a field baseline value for future comparison, and found no substantial insecticide resistance to date.Other studies indicate documenting that aphid population growth increases with increased soil nitrogen, but not with potassium; developing a regional aphid monitoring network which provides early-warning of higher than average aphid populations in Wisconsin and Michigan; and developing beta software for an automated aphid counting system that shows good accuracy in preliminary testing; ultimately this tool may help speed data collection and also scouting for management decisions.