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Grape Tube Galls: Midge-Caused, Harmless

Q: Curious spikes on wild grapevine in late summer.

A: Grape tube galls from midge eggs on leaf undersides. Larvae secrete hormones creating horn-like galls. Minimal vine damage—no control needed. Slice open to see yellow larvae inside.

Grape Tube Galls

About Gardening: Hickory Tree Galls: Cosmetic, Not Fatal—Focus on Tree Health; Maple Spindle Gall Mites: Cosmetic Leaf Galls; Oak Galls in Arizona: Tiny Wasps, Harmless Growths; Horned Oak Galls on Pin Oak: Same Pest, Same Approach; Preventing Camellia Leaf Gall Next Spring; Tree Galls on Chinaberry and Goldenrain: Identification and Low Concern; Oak Galls: Cosmetic Issue, Rarely Harmful; Sumac Gall Aphids: Life Cycle and Management; Cherry Leaf Galls: Harmless Bumps Caused by Insects; Plant Galls: Insect-Caused Growths That Look Alarming But Are Harmless

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