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Integrated Pest Management · Agriculture and Natural Resources

University of California

Bees and wasps



Larva of pearslug

Larva of pearslug (cherry slug).

Galls on oak

Galls on oak.

Although many bees and wasps (Order Hymenoptera) are beneficial through their activities as pollinators or natural enemies of pests, some can cause damage to people, plants, or structures by stinging, boring holes, causing plant galls, or being a nuisance in and around homes.


Gallmakers (general)

Sawflies (general)

Woodwasps and horntails

Yellowjackets and other social wasps

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related or similar insects

For information about beneficial wasps, including insect parasites, see the Natural Enemies gallery