Abstract
Abstract In the Midwest United States, soybean aphids can cause significant economic losses in soybean production. The repeated use of insecticides within the same family has led to the development of insecticide resistance in soybean aphids. Implementing integrated pest management (IPM) and insecticide-resistance management (IRM) strategies can help farmers reduce the frequency of insecticide applications and delay the evolution of soybean aphid resistance while reducing production costs, maintaining yields, and protecting the environment. Farmers play a crucial role in implementing such practices; therefore, to understand farmers’ practices for management of soybean aphids and their perceptions of insecticide resistance, a survey of soybean farmers in Minnesota and North Dakota was conducted in 2021. Overall, the reported decision-making sources were similar for both farmers who changed and those who did not change their aphid management due to insecticide resistance; these were crop consultants and agricultural retailers. The threshold used by farmers in both groups to determine whether to use a foliar insecticide was lower than the research-based threshold for soybean aphids, and farmers were aware that this could contribute to insecticide resistance. In addition, farmers who changed soybean aphid management were more concerned than farmers who did not change about insecticide resistance and were implementing good practices such as scouting, using labeled application rates, and rotating insecticide modes of action. The results of this research can inform the refinement of IPM and IRM programs as well as extension education efforts.
Published Version
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