Return to insects

Grape Colaspis (Colaspis brunnea) is an occasional pest of seedling beans. The adult grape Colaspis is common on many types of plants and may feed a bit on leaves, but it does not cause economic damage. However, serious damage can result when larvae feed on roots and underground stems. Larvae, which resemble miniature grubs, are cream-colored, C-shaped with a tan head capsule, and reach a length of about 1/6 inch. Damaged plants may be stunted and yellow due to larval feeding on roots.

Grape Colaspis larva.

(Photo: Ric Bessin, University of Kentucky)

Grape Colaspis adult.

(Photo: Ric Bessin, University of Kentucky)

Management:

• Economic thresholds and rescue treatments are not available, so replanting may be necessary.

Return to insects