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Western Corn Rootworm

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description Western Corn Rootworm Overview

Western corn rootworm is the common name for the beetle Diabrotica virgifera virgifera, a member of the leaf beetle family Chrysomelidae. Its larvae feed mainly on maize roots, causing root pruning, lodging, and reduced support, while adults feed on leaves, pollen, silks, and young kernels. Native to North America, it was first reported in Europe in 1992 and has since spread through parts of the continent, where maize is its principal crop host.

help Western Corn Rootworm FAQ

What crop does the western corn rootworm attack?

Western corn rootworm, Diabrotica virgifera virgifera, is mainly a maize or corn pest. Its larvae feed on roots, while adults eat corn leaves, pollen, and silks.

How does western corn rootworm damage corn plants?

Root feeding prunes the root system and can reduce the plant’s ability to absorb water and remain upright. Severe injury can cause lodging, where corn plants lean or fall over and become harder to harvest.

What does the adult western corn rootworm look like?

Adults are small leaf beetles with a compact body, and coloration can range from yellowish to greenish with darker markings. Identification should be confirmed with regional extension guidance because several corn beetles look similar.

How can farmers manage western corn rootworm?

Management can include crop rotation, resistant or Bt corn traits where effective, seed treatments, and targeted insecticides. Resistance has developed in some populations, so local scouting and resistance-management advice matter.

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