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