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Grape rootworm

Fidia viticida (Walsh)
Chrysomelidae: Coleoptera

This beetle is 6 mm long and light brown with yellow hairs. It feeds on grape foliage as an adult, making a chainlike damage pattern. Immature stages feed on grape roots. Infestations that go untreated for many years can lead to vineyard decline. Grape rootworm adults begin appearing in vineyards in mid- to late May and then lay eggs on the vine trunks.

Larvae later crawl into the soil and attach themselves to grape roots, remaining there for 1 to 2 years while completing their development. Larvae eat small roots and bore into larger ones.

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The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.