How to Manage Pests

Pests in Gardens and Landscapes

Pest identification and confirmation

Four common leaf spot diseases in strawberry
Common leaf spot
Common leaf spot
Ramularia tulasnei

Lesions have light brown centers and dark, reddish brown margins. As the leaf spot develops, lesions grow together to cover much of the leaf surface.
Leaf blight
Phomopsis leaf blight
Phomopsis obscurans

Lesions are dark, purplish brown with light centers. In the center of lesions are spore-forming structures that appear as black dots.
Angular leaf spot
Angular leaf spot
Xanthomonas fragariae

Characterized by watery lesions on the undersides of leaves. They develop into irregular, reddish brown spots on the upper leaf surface. The spots may have yellow or reddish margins.

Leaf blotch
Leaf blotch
Zythia fragariae

Purplish or brown blotches on younger leaves of strawberry plants and black lesions on stems and leaf blades. Lesions may be dotted with black spore- forming structures.


Statewide IPM Program, Agriculture and Natural Resources, University of California
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