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Oak Sower Gall: Tiny Wasp Nursery on Twigs

White, fuzzy gall with seed-like capsules is the oak sower gall, formed around eggs of a minute wasp. Harmless to tree and people. Place in a jar; adults emerge in a week—release them.

Oak sower gall whole Gall interior capsules Emerging wasps

About Gardening: Horned Oak Galls on Pin Oak: Same Pest, Same Approach; Jumping Oak Galls: The Hopping Gold Granules Under Oaks; Water Oak Twig Galls: Cosmetic Concern Only; Oak Galls: Species-Specific, Not a Health Threat; Oak Galls: Cosmetic Issue, Rarely Harmful; Jumping Oak Gall: Tiny Wasps Cause Leaf Drop; Gouty Oak Gall: Strange Growths on Oak Trees; Oak Apple Galls: Nature's Curious Growths on Oak Trees; Large Oak Trunk Gall (Crown Gall) May Not Kill Tree for Years; Crown Gall on Oak: Bacterial Tumor with a Biotech Legacy

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