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Callirhytis Oak Gall Wasps

By: James Baker PDIC Factsheets

This factsheet describes the biology of the Callirhytis gall wasp, which infests the twigs and leaves of many species of oaks.

Baldfaced Hornets in Landscapes

By: James Baker PDIC Factsheets

This factsheet describes the biology of baldfaced hornets, Dolichovespula maculata, wasps that build large, gray cardboard nests in trees.

Yellowjackets in the Landscape

By: Steven Frank, James Baker PDIC Factsheets

This factsheet describes the biology of yellowjackets— small, social wasps that often nest near or in landscapes.

Wool Sower Gall Wasp

By: James Baker PDIC Factsheets

This factsheet describes the biology and management of the wool sower gall wasp, Callirhytis seminator, and provides residential management recommendations.

Blue-winged Wasp

By: James Baker PDIC Factsheets

This factsheet describes the biology of scoliid wasps, including Scolia dubia.

Cotesia Congregata, Parasitoid

By: James Baker PDIC Factsheets

This factsheet describes the biology of Cotesia Congregata, a parasitoid.