UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

Search

SKIP navigation

Home & garden
Agriculture
Natural environments
Exotic & invasive

Weather data & products
Degree-days
Interactive tools & models

Natural enemies
Weeds

Publications & more
Workshops and events
Training programs
Pesticide information

Grants programs
Funded-project results


 

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 synthetic pesticide, such as carbaryl can be applied when adults are seen if infestations are severe.

Female rose curculio beetle
Female rose curculio beetle adult, drawing by Chittenden, 1901


Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2009 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See How to manage pests, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/GARDEN/PLANTS/INVERT/rosecurculio.html revised: March 5, 2009. Contact webmaster.