How to Manage Pests
UC Pest Management Guidelines
Scientific name: Hoplia spp.
(Reviewed 6/06, updated 10/08)
In this Guideline:
Hoplia beetles are robust beetles that measure 0.25 to 0.3 inches long. The dorsum of the adult beetles is reddish brown and their heads are darker. The underside of the body is silvery and shiny. The whitish larvae are found in the ground and are C-shaped with a bulbous posterior. Adults emerge from the soil in spring and fly to vineyards to feed and mate.
Feeding damage is usually sporadic within the vineyard but may recur annually in the same area. Plant injury usually occurs when shoots are 12 to 14 inches long and consists of feeding on developing fruit clusters and leaves.
Damage by hoplia beetles occurs so seldom that in most cases spot treatments applied where damage is observed are sufficient. Spring treatments applied for other pests probably suppress most hoplia infestations that do occur. Few products are registered specifically for this use.
UC IPM Pest Management Guidelines:
Insects and Mites
W. J. Bentley, UC IPM Program, Kearney Agricultural Research Center, Parlier
Acknowledgment for contributions to Insects and Mites:J. Granett, Entomology, UC Davis