University of Minnesota Extension Educator Angie Peltier says soybean aphids have approached treatment levels for some producers in the Red River Valley. Fields near buckthorn infestations and the earlier planted soybeans are more likely to see early soybean aphid pressure. “Every week to ten days is really what is recommended for scouting. As we enter exponential growth stages, we suggest increasing that frequency.” Producers are reminded not to spray until threshold is reached. “When we have more than 250 aphids per plant on more than 80 percent of plants and populations are still increasing is the important information to determine that you have reached threshold.”
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