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Walnut Anthracnose

Name: Walnut Anthracnose
SKU: ART-4098

Informational table showing disease name, symptoms, pathogen/cause, and management of Walnut Anthracnose disease.

Updated:

November 20, 2023

Disease	Symptoms	Pathogen/Cause	Management
Anthracnose	Circular, brown spots with yellow halos form on the undersides of leaflets as the leaves reach full size. Leaflets turn yellow, then brown, and then fall prematurely, leaving trees very bare by August. Tiny, brown fungal fruiting structures form mostly along leaf veins on the undersides of leaves.	Gnomonia leptostyla	It is thought that little actual damage occurs to the tree since most of the growth has occurred before the leaves fall. However, repeated severe defoliation gradually weakens the tree. Fertilize the tree well to maintain good vigor.