Plant Diseases

On this page:

Lawn Diseases

fairy ring
Fairy Rings

turf rust
Rusts

snow mold
Snow Molds

Tree & Shrub Diseases

Anthracnose on maple
Anthracnose

apple scab
Apple Scab

galls
Galls

powdery mildew on maple
Powdery Mildew

White Pine Blister Rust
White Pine Blister Rust

salt damage on pine
Other Problems

Flower Diseases

rose leaves with symptoms of black spot
Black Spot of Rose

lily plant with day lily rust
Daylily Rust

powdery mildew on phlox
Powdery Mildew

Garden Fruits, Vegetables & Berries

tomatoes with anthracnose
Common Tomato Diseases

downy mildew on cucumber
Downy Mildew of Cucurbits

late blight symptoms on tomato
Late Blight

powdery mildew on pumpkin
Powdery Mildew

[Photos, left to right: unknown; University of Minnesota Extension; unknown; (anthracnose) Dr. Wayne Sinclair, Cornell University; (apple scab) Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org; (galls) William M. Ciesla, Forest Health Management International, Bugwood.org; James Solomon, USDA Forest Service, Bugwood.org; Steven Katovich, USDA Forest Service, Bugwood.org; Steven Katovich, USDA Forest Service, Bugwood.org; (powdery mildew) Andrej Kunca, National Forest Centre - Slovakia, Bugwood.org; (white pine blister rust) Joseph O'Brien, USDA Forest Service, Bugwood.org; (other) University of Minnesota Extension; Yuan-Min Shen, Taichung District Agricultural Research and Extension Station, Bugwood.org; Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org; The Dow Gardens Archive, Dow Gardens, Bugwood.org; Texas AgriLife Extension Service, Texas A&M System; Gerald Holmes, Valent USA Corporation, Bugwood.org; Department of Horticulture Website at Cornell University; Howard F. Schwartz, Colorado State University, Bugwood.org]