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Hickory Leaf Galls: Insect Eggs Inside Leaf Tissue—No Treatment Needed

What Are the Green Balls?

Small green balls on hickory leaves with whitish/orange insects inside are leaf galls caused by gall-making insects (midges, wasps, or aphids). The tree walls off the eggs/larvae in plant tissue—a protective response.

Why No Treatment Is Needed

Galls are cosmetic; tree health unaffected.
Insects are protected inside—sprays don't reach them.
Natural enemies (parasitoids) usually control populations.
Populations fluctuate yearly—often disappear on their own.

Monitor Only

Watch for leaf wilting, browning, or premature drop. If none, enjoy the ecology. No action required.

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