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Scout double-crop, late planted soybeans for soybean aphids Picture of soybean aphids accompanies this article By Nick Roy, Adair County Extension Agent High infestations of Soybean Aphids have been reported in late planted soybeans fields in Adair County this week. UK Entomologist Doug Johnson feels this is mostly due in part to the recent cooler temperatures. Soybean aphids have caused as much as 50% loss of production to many U.S. farmers since 2000, however, infestations in Kentucky fields had been non-threatening. Wingless soybean aphids are soft-bodied, teardrop shaped and adults are approximately 1/16 inch in length. The young are much smaller. Their color varies from pale yellow to green. The soybean aphid is the only aphid in Kentucky that produces offspring on soybeans. Therefore, any colony of aphids found on soybeans must be that of the soybean aphid. Because of their small size, they can be hard to locate on plants if a low infestation is present. Producers may start searching for ants; ants will collect honeydew produced from aphids. It is unlikely, but not impossible that these populations will eventually require insecticidal treatment. The threshold for Soybean Aphid remains:
If you find large populations of soybean aphids or have questions; please contact Nick Roy at the Adair County Cooperative Extension Service at (270) 384-2317. This story was posted on 2008-09-23 11:13:24
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