Galls come in a variety of sizes, shapes and colors.
Twig and stem galls usually persist for more than a year, weakening stems and twigs and causing them to drop during storms. Chemical treatment is usually unwarranted and ineffective. Unsightly galls can be hand-picked or infested plant parts pruned and discarded. Do not destroy beneficial wasps that parasitize gall-forming insects. Privacy Statement 2001 City of Austin, Texas .