Large Bumpy Growths on Hickory: Phomopsis Galls or Crown Gall

The Find

Hiking in mixed woods: tree with 3–9″ bumpy growths. Web suggests Phomopsis galls.

Phomopsis (fungus) can cause galls; also bacteria (crown gall) or insects. Lab exam of tissue needed for exact ID.

Plant Diseases: Tree Black Growth and Sap: Gummosis from Borers or Black Knot Disease; Oak Leaf Galls: Harmless Wasp-Induced Growths; Maple Spindle Galls: Cosmetic Only, No Treatment Needed; Oak Galls (Horned/Gouty): Cosmetic, Not Lethal; Tree Galls on Chinaberry and Goldenrain: Identification and Low Concern; Why Trees Don't Grow Indefinitely Tall: Hydraulic and Genetic Limits; Oak Apple Galls on Red Oak: Harmless Curiosities; Daisy Tree (Montanoa) Indoors: High Light Requirements; Frost-Damaged Ficus: Prune and Wait for Regrowth; Oak Galls: Wasp-Caused Growths — Harmless to Kids, Manageable for Trees

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