Many soybean fields have yet to be planted across Iowa or have not emerged because of the cold, wet soils. So how does this situation affect the bean leaf beetle? Delayed soybean emergence is unlikely to greatly affect the survival of overwintered beetles. Bean leaf beetles can sustain themselves on alfalfa and other legumes before soybean is available. Females do not lay eggs in alfalfa and will wait until soybean emerges from the soil.
Iowa State University
Rice, Marlin E. and Bradshaw, Jeffrey D., "Bean leaf beetles and delayed soybean planting" (2003). Integrated Crop Management News. 1608.
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