How to Manage Pests

Pests in Gardens and Landscapes

Rose curculio—Rhynchites bicolor

The adult rose curculio is a red to black snout weevil, 0.25 inch long. Small, whitish larvae occur in buds.

Damage

Weevils cause ragged blossoms and punch holes in flowers and canes.

Solutions

Avoid yellow and white roses apparently preferred by the beetle. Handpick adults and destroy infested buds. Rose curculio is usually not a serious pest and usually should not require treatment. However, a broad-spectrum insecticide can be applied when adults are seen if infestations are severe.

Adult rose curculio
Adult rose curculio

Adult rose curculio beside feeding damage holes on a rose blossom.
Adult rose curculio beside feeding damage holes on a rose blossom.


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