Volume 64 Number 7 Date 06/13/2019
SOYBEAN APHID - Surveys conducted in Dane, Green, Jackson, La Crosse, Monroe, Rock, Trempealeau and Walworth counties found no soybean aphids as of June 13. The first soybean aphids of the growing season are likely to appear in fields during the week of June 16-22.
BEAN LEAF BEETLE - Light defoliation was observed in nearly all of the soybean sites surveyed in the south-central counties, though fewer than 5% of the plants were affected in most fields and beetle counts were very low. Chemical control of this pest during the soybean vegetative stages should be considered only if fieldwide defoliation levels exceed 40% or if populations of 39 or more beetles per foot of row are observed. Economic soybean damage directly resulting from bean leaf beetle feeding has never been documented in Wisconsin.
-- Krista Hamilton, DATCP Entomologist