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Chestnut Blight: Recognizing a Fatal Disease

Is Your Tree Dying from Chestnut Blight?

A tree with long trunk splits, no spring leaf-out, and only late-season basal sprouts is showing classic signs of chestnut blight (Cryphonectria parasitica)—a fatal fungal disease that decimated American chestnuts.

Diagnostic Clues

Trunk cracks/splits: Cankers girdle the trunk, killing cambium.
Failure to leaf out: Vascular tissue destroyed.
Basal sprouts: Last-ditch survival attempt from root collar.
History: Prickly burs (chestnut fruits) confirm species.

Prognosis

There is no cure. The fungus persists in the environment. Even if sprouts grow, they will eventually succumb. The tree cannot be saved.

Options

Remove the tree to prevent hazard as it decays.
Consider planting blight-resistant hybrids (e.g., Castanea dentata × mollissima) or other species.
Learn more: Tree Canada chestnut blight info.

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