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Biology and Economics of Recommendations for Insecticide-Based Management of Soybean Aphid

R. L. Koch, et al.

December 2016


Soybean aphid remains the key insect pest of soybean in the north-central United States. Management of this pest has relied primarily on scouting and application of foliar insecticides based on an economic threshold (ET) of 250 aphids per plant. This review explains why this ET remains valid for soybean aphid management, despite changes in crop value and input costs. In particular, we review how soybean aphid impacts soybean yield, the role of biology and economics in recommendations for soybean aphid management, and the short and long-term consequences of inappropriately timed insecticide applications.


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