Corn Wireworm, Melanotus communis
(Coleoptera: Elateridae)

The corn wireworm is widespread throughout North America and is very common in the southeastern United States. A four-year life cycle has been reported but the life cycle usually takes from two to three years. Pupation occurs in the autumn and adults are able to overwinter in protected areas. The larvae are yellow to yellow brown, shiny, and elongated.

Vegetable crops that are damaged include cabbage, corn, lettuce, pepper, potato, sweetpotato, and sweet corn. Damage is caused by the larvae feeding below ground on plant tissue. They will kill young plants in some situations and tend to prefer areas in the field that are high in moisture. Insecticides are often applied to prevent crops from being injured by the larvae. The most common approach is to apply liquid or granular formulations at planting and to incorporate the insecticide near the seeds or seedlings. Cultural practices include crop rotation, fallowing, and flooding. Wireworm populations may be determined by sampling techniques such as baiting.

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Corn wireworm, Melanotus communis, adult.
(Photographer: L. Buss, University of Florida)

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Corn wireworm, Melanotus communis, larva.
(Photographer: J. Capinera, University of Florida)

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