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Soybeans
Volume 58 Number 7 Date 06/13/2013 SOYBEAN APHID - This insect has begun to colonize soybean fields in southern and central Wisconsin. Alates and nymphs were detected on 1%-18% of the plants in 10 of 17 fields surveyed in Dane, Iowa, Monroe and Richland counties from June 6-12. Densities ranged from 1-30 aphids per infested plant, with a high count of 79 aphids per 100 plants in western Dane County. Twenty additional VE-V1 fields examined in Dodge, Green, Jefferson, Rock, Sauk and Walworth counties had no detectable aphid population. BEAN LEAF BEETLE - Soybean fields in Dane, Jefferson, Monroe, Richland, Rock and Sauk counties are showing 5-25% of plants with minor defoliation caused by this insect. Although damage is currently limited to a few holes in the leaves, injury could become more severe next week as additional beetles migrate to emerging soybeans. -- Krista Hamilton, DATCP Entomologist 
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