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 the grape bud beetle |
