U of M Gardening Information: What's wrong with my plant?

Strawberries > Leaves > Distorted leaves

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Credit: M. Ellis, Ohio State University
Credit: John A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org
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Feeding on the underside of leaves causes a “russet” appearance to the leaves; leaves may become distorted
In hseavy infestations, webbing can be found on underside of leaves
Adult spider mites are very small (approximately 1/50 inch in length), and are yellow to dark crimson, with dark spots
Mites usually appear in late June-August; more prevalent in hot, dry weather
More information on Spider Mites...

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Infected leaflets curl up, exposing undersides that often are reddened and coated with a grayish white powdery mildew fungus
Leaves will eventually turn purple or red
Common in mid to late summer
More information on Powdery Mildew...

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In light infestations, leaves are wrinkled and are slightly darker in color
In heavy infestations plants become severely stunted and wrinkled, resulting in a compact leaf mass in the center of the plant
Usually found along the midrib of folded leaves and under the calyx of the fruit
Oval in shape, pinkish or amber colored, and shiny; 1/100-inch in length (not visible without handlens)
More likely to be present in spring/early summer
More information on Cyclamen Mites...

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Larvae feed on upper sides of leaves, secreting thread they use to fold and tie leaflets together
Larvae are pale green to gray-brown in color, and are approximately ½ inch in length when mature
Larvae present in May-June, and again in late summer
More information on Strawberry Leafroller...