Corn Rootworm Larvae
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Corn rootworm larvae (Diabrotica virgifera virgifera, Diabrotica barberi) can destroy corn roots during the month of June. The western corn rootworm is the most common of the rootworms attacking corn in Kentucky and is a pest here only of continuous corn, in contrast to states to our north. That may change in years to come. Eggs are laid in midsummer and remain dormant until the following spring, when they begin to hatch in late May. The small larvae move a short distance in the soil to feed on corn roots. Only one generation occurs per year.
Corn rootworm larvae and characteristic damage to roots.
(Photo: UK Vegetable IPM Team, University of Kentucky)
Management:
- Rotation is still the most effective method of corn rootworm management in Kentucky. Soil-applied insecticides are also available for rootworm management.
