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Pest identification and confirmation
Leaf spot diseases of strawberry

Several pathogens of strawberry cause discolored lesions in leaves. Sometimes other plant parts are also affected.

Angular leaf spot
Angular leaf spot
Xanthomonas fragariae
Infected leaves develop irregular, reddish brown spots on the upper leaf surface that are delimited by major veins. The lesions may have reddish or yellow margins.		 Common leaf spot
Common leaf spot
Ramularia tulasnei
The most common cause of spotted strawberry leaves. Lesions have light brown centers and dark, reddish brown to purple margins. The spots have a sharply defined border. Spots commonly grow together to cover much of the leaf surface.

Leaf blotch
Leaf blotch
Zythia fragariae
Gray to tan, irregular-shaped lesions generally appear along the leaflet margins. Numerous, black, tiny, spore-forming bodies often develop in the leaf lesions. Dark lesions may develop on the calyx (green cap) of fruit.

Leaf blotch
Leaf scorch
Diplocarpon earlianum =Marssonina fragariae
Leaf scorch causes brown to purple spots on the upper leaf of strawberry leaves. Spots typically have an indistinct border. When infections are abundant the leaf tissue between lesions commonly becomes bright red to purplish. Spotted leaves eventually turn brown, dry up, and curl at the margins giving the leaf an overall burnt or scorched appearance. Infected fruit may develop discolored streaks or sunken lesions.

 Leaf blight
Phomopsis leaf blight
Phomopsis obscurans
Lesions are dark, brown to purplish with pale centers. Tiny spore-forming structures that appear as black dots can develop in the center of lesions.

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