Articles

Hickory Diseases

Name: Hickory Diseases
SKU: ART-4068

Informational table showing disease name, symptoms, pathogen/cause, and management of Hickory diseases.

Updated:

November 16, 2023

Leaf spot on hickory leaves

Disease	Symptoms	Pathogen/Cause	Management
Leaf spot	Irregular, reddish-brown spots on the upper leaf surface form while brown spots occur on the lower leaf surface. In severe cases, leaves may fall prematurely.	Gnomonia caryae	No control is recommended since the disease occurs late in the season and little damage results. However, raking and destroying leaves in the fall can reduce the amount of inoculum near the trees.
Microstoma, downy, or white leaf spot	Pale yellow spots of various sizes are observed on the upper side of the leaf. The lower side of the leaf spot appears white or powdery. In severe cases, a witches'-brooming occurs on branch tips (= large numbers of twigs).	Microstoma juglandis	No control is recommended. White, bur, shingle, overcup, or post oaks are also susceptible.