Plant pathogens come in a wide variety of forms and can impact trees in many ways.  Some diseases can be managed with proper cultural practices or other forms of treatment, while others typically cause mortality in trees.  Learn more about diseases commonly found on forest and landscape trees in Kentucky in this section.


Photos courtesy: 
Cedar-apple rust - Ellen Crocker
Ganoderma root rot - Ellen Crocker
Oak wilt - C.E. Seliskar,


Submitting Plant Specimens for Disease Diagnosis

Considerations for Diagnosis of Ornamentals in the Landscape

Flowering Dogwood Diseases

Bacterial Leaf Scorch

Canker Sampling of Trees and Woody Ornamentals

Diplodia Tip Blight of Pine

Dothistroma Needle Blight of Pine

Cherry Black Knot

The Role of Shearing in the Management of Diplodia Tip Blight

Shoe String Root Rot - A Cause of Tree and Shrub Decline

Slime Molds, Lichens and Sooty Mold Problems on Plants

Common Diseases of Spruce in Kentucky

Sample Submission Protocol for Diagnosis of Thousand Cankers Disease in Walnuts

Tree Wounds - Invitations to Woody Decay Fungi

Verticillium Wilt of Woody Plants

Fire Blight

When White Pines Turn Brown - Common Problems of White Pines in Kentucky

Twig Blights of Juniper

Cercospora Leaf Blight in Kentucky

Powdery Mildew

Backyard Apple & Pear Disease, Pest, and Cultural Practices Calendar

Backyard Peach & Stone Fruit Disease, Pest and Cultural Practices Calendar

Laurel Wilt

Thousand Cankers Disease

Sudden Oak Death

US Forest Serivce Pest Alert - Sudden Oak Death

US Forest Serivce - How to Identify and Manage Dutch Elm Disease

US Forest Service Pest Alert - Dutch Elm Disease (DED) and the American Elm

US Forest Serivce Pest Alert - Butternut Canker

Oak Wilt

How To Recognize Common Diseases of Oaks in the Midwest: A Quick Guide

US Forest Service Pest Alert - Oak Wilt in the Northeastern United States

US Forest Service Pest Alert - Elm Yellows

US Forest Service Pest Alert - Beech Bark Disease

US Forest Service Pest Alert - Diplodia corticola "Bot Canker" of Oak