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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Fruit > Strawberry > Discolored leaves

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Strawberries > Leaves > Discolored

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  • Image: Leaf Blight 1
  • Image: Leaf Blight 2
  • Image: Leaf Blight 3

Leaf Blight
Phomopsis obscurans

  • First see purplish red round leaf spots with a gray brown center
  • Spots grow into a large V shaped lesion with a dry brown triangle in the center and a reddish purple V shaped border
  • Elongated, sunken, purplish brown or reddish brown spots or streaks may be seen on stems
  • Berries can develop soft pink-brown spots
  • More information on Leaf Blight
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  • Image: Spider Mites 1
  • Image: Spider Mites 2

Spider Mites
Tetranychus urticae

  • Feeding on the underside of leaves causes a “russet” appearance to the leaves; leaves may become distorted
  • In heavy 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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  • Image: Potato Leafhopper 1
  • Image: Potato Leafhopper 2

Potato Leafhopper
Empoasca fabae

  • Leaves appear wrinkled from leafhopper feeding; may have a yellow tinge to the leaves
  • PLH adults are lime green, slender, small (1/8 inch long), and wedge-shaped
  • Leafhoppers are present from June-August
  • More information on Potato Leafhopper
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  • Image: Nitrogen Deficiency 1

Nitrogen Deficiency

  • Leaves turn yellow, most obvious on older, lower leaves
  • Plants grow slowly, produce few leaves and daughter plants
  • Plant produce few and small berries
  • Common in sandy soils
  • More information on Nitrogen Deficiency
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  • Image: Leaf Scorch 1
  • Image: Leaf Scorch 2
  • Image: Leaf Scorch 3

Leaf Scorch
Diplocarpon earlianum

  • Small solid purple spots on leaves, No light colored center
  • Leaf tissue around spots turn reddish or purple
  • Edges of leaves eventually turn brown and dry out; appearing burnt or "scorched"
  • Elongated, sunken, purplish brown or reddish brown spots or streaks may be seen on stems
  • More information on Leaf Scorch
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  • Image: Glyphosate Herbicide Injury 1

Glyphosate Herbicide Injury

  • Yellowing appears suddenly, and is restricted to the veins
  • Plant appears stunted because of small leaves crowded close together
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  • Image: Powdery Mildew 1
  • Image: Powdery Mildew 2

Powdery Mildew
Podosphaera aphanis

  • 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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  • Image: June Yellows 1
  • Image: June Yellows 2

June Yellows

  • Plants turn completely yellow in May and June but then later recover
  • Genetic disorder common in Mesabi and related varieties
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  • Image: Iron Chlorosis 1

Iron Chlorosis

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