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Soybeans
Volume 58 Number 8 Date 06/20/2013 SOYBEAN APHID - Surveys of VE-V3 soybeans found aphids in 18 of 49 (37%) fields sampled in the southern two-thirds of the state. Densities ranged from 1-32 aphids per infested plant on 1-28 per 100 plants examined. Specific counties in which the aphids were detected include Buffalo, Clark, Eau Claire, Fond du Lac, Green Lake, Jackson, Marathon, Marquette, Portage, Sauk, Sheboygan and Wood. Early colonies were also found in Dane, Iowa, Monroe and Richland counties during the previous week, suggesting that the aphids are already distributed at low densities across most of the state. BEAN LEAF BEETLE - Minor defoliation was again noted in southern Wisconsin soybean fields. Less than 10% of the plants were affected in fields surveyed in Columbia, Dane, Iowa, Richland and Sauk counties, and no more than 1-2 adults per 25 feet of row were observed. Treatment is recommended for defoliation levels of 40% defoliation or populations of 39 or more beetles per foot of row during the vegetative stages. -- Krista Hamilton, DATCP Entomologist 
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