How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Grape bud beetle

Grape bud beetle has one generation per year. Larval stages are spent in the soil feeding on grape roots. Adults begin emerging from the soil in mid-January; peak emergence occurs around mid-March each year. About 1 to 2 weeks after emergence, egg laying begins. The female projects a long ovipositor to insert egg clusters under bark or between layers of grape bark. On hatching, larvae drop to the ground and immediately enter the soil.

Larvae of grape bud beetle
Larvae of the grape bud beetle

Statewide IPM Program, Agriculture and Natural Resources, University of California
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