Problem

Publication

Anthracnose

Joseph OBrien, USDA Forest Service,
Bugwood.org
Anthracnose
(Apiognomonia)
Shade Tree Anthracnose
Bacterial leaf scorch

John Hartman, University of Kentucky,
Bugwood.org
Bacterial Leaf Scorch
(Xylella)
Bacterial Leaf Scorch
Tubakia leaf spot

Steven Katovich, Bugwood.org
Leaf Spot
(Tubakia)
Tubakia Leaf Spot Appearing on Oak Trees
Powdery mildew

Paul Bachi, University of Kentucky
Research and Education Center, Bugwood.org
Powdery Mildew
(Phyllactinia)
Powdery Mildew
Oak apple gall

Steven Katovich, Bugwood.org
Oak Apple GallCommon Oak Galls
Horned oak gall

John A. Weidhass, Virginia Polytechnic
Institute and State University, Bugwood.org
Horned
Gall Wasp
Horned Oak Gall
Jumping oak gall

Steven Katovich, Bugwood.org

Jumping
Oak Gall

Common Oak Galls
Oak skeletonizer

James Solomon, USDA Forest Service, Bugwood.org
Leaf Skeletonizer
Leaf Skeletonizers on Oaks