Galls, Diseases, and Pests - Gouty Stem Gall Wasp
Callirhytis quercussuttoni
Many gall-inducing insects produce more than one generation per year. And because of the different factors involved, the galls can be very different from one generation to the next. Not only can the gall look very different, but the gender of the organism can also vary. After the female wasps lay eggs in the leaves, the bisexual-generation of the Gouty Stem Gall Wasp develops in tiny galls on Coast Live Oak leaves.
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The exit hole is very obvious on this gall.
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