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Soybeans
Volume 57 Number 19 Date 08/23/2012 SOYBEAN APHID - Surveys in 82 fields in the past two weeks again revealed remarkably low counts, even lower than when the same fields were checked in July. The reduction in aphid populations at many of the survey sites is due in part to widespread use of insecticides/miticides this season since most of the products registered in Wisconsin for mite control in soybeans also have efficacy against aphids. GREEN CLOVERWORM - Larval populations have shown a minor increase. Soybean fields in Dane, Jefferson and Monroe counties contained 15-25 per 100 sweeps this week compared to about 0-4 per sweep about 2-3 weeks ago. Defoliation levels remain fairly low at less than 5-10% and treatment for this pest has been unwarranted this year. --Krista Hamilton, DATCP Entomologist 
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