White Oak Galls: Fuzzy Balls Are Insect Homes, Not Leaf Eaters

Observation

White oak leaves: yellow/pink fuzzy round balls + holes in leaves. Are the balls eating leaves?

Identification: Oak Galls

• Caused by tiny wasps (Cynipidae) or midges.
• Plant tissue grows around insect larva = gall.
• Fuzzy balls = specific gall type (e.g., wool sower gall, hedgehog gall).
• Holes = separate insect feeding (caterpillars, beetles, sawflies).

Key Facts

• Gall makers do not eat leaf tissue—they live inside gall.
• Leaf holes = different insects.
• Galls rarely harm tree health (cosmetic).
• No feasible treatment for gall wasps.

Management

1. Rake/destroy fallen leaves (overwintering site).
2. Water deeply during drought.
3. Protect trunk from mower/trimmer.
4. Accept galls as biodiversity.

Google "oak galls images" — you'll see amazing diversity. Your tree is fine.