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| Grape
rootworm Rufus Isaacs, MSU Entomology |
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| Home > Scouting guide> grape rootworm | ||||
| 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 one to two years while completing their development. Larvae eat small roots and bore into larger ones. | ||||
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05/26/11 Contact: E. Haney