Bean leaf beetles began emerging from overwintering sites during the last week of April in central Iowa. These beetles can be found in roadside ditches, field margins, and alfalfa fields where they are feeding and mating. As soon as soybean seedlings emerge, the beetles will fly to soybean fields to lay eggs. The significance of this activity is that the beetles have the potential of transmitting bean pod mottle virus to soybean seedlings.
Iowa State University
Rice, Marlin E., "Beetles, virus, and management in soybean" (2001). Integrated Crop Management News. 1865.
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