Scout for aphids to protect soybean yields
ST. PAUL -- Soybean aphids have become the most damaging insect pests in soybeans; untreated populations can cause 40 percent or more yield loss. There's a very reliable treatment threshold, developed from a multi-state project spearheaded by the University of Minnesota.
Using research data from commercial soybean fields, U of M Extension recommends treating when rising aphid populations reach 250 per plant, with 80 percent or more of the plants in the field harboring aphids.
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