UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

SKIP navigation

 

UC IPM Home > Homes, Gardens, Landscapes, and Turf > Trees and Shrubs > Invertebrates

  Printer-friendly version

How to Manage Pests

Pests in Gardens and Landscapes

Baccharis gall fly—Rhopalomyia californica

Baccharis gall fly adults are tiny, delicate flies that lay tiny reddish eggs on terminals. Orange maggots are up to 0.063 inch long in galls.

Damage

The baccharis gall mite causes fleshy, knoblike swellings or galls on shoot tips. Galled shoots stop growing.

Solutions

Plants are not killed by baccharis gall flies. Tolerate galling on plants. Many species of beneficial parasites attack gall fly larvae; conserve natural enemies. There are no known artificial controls.

Galling of shoot tip
Galling of shoot tip

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2011 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 our Home page, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/GARDEN/PLANTS/INVERT/baccharisgallfly.html revised: April 15, 2011. Contact webmaster.