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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Vegetable > Beet > Spots or blotches on leaves

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Beet > Leaves > Spots or blotches on leaves

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  • Image: Cercospora Leaf Spot 1
  • Image: Cercospora Leaf Spot 2
  • Image: Cercospora Leaf Spot 3

Cercospora leaf spot
Cercospora beticola

  • Leaves develop circular (1/8 – 3/16 inch) brown to gray spots with distinct reddish-purple
  • Lower leaves are infected first and often most severely affected
  • In humid weather, produce silver or steel-gray spores which gives the leaf spot a fuzzy appearance
  • Centers of spots may have black dots
  • Plants may be stunted
  • More information on Cercospora Leaf Spot
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  • Image: Spinach Leafminer 1
  • Image: Spinach Leafminer 1
  • Image: Spinach Leafminer 3

Spinach leafminer
Pegomya hyoscyami

  • Winding trails (mines) caused inside leaves
  • These mines eventually expand into irregular blotches
  • Mines are opaque at first and then turn brown
  • Adult flies are gray-brown, small (1/3"), and present May to June, although they normally are not seen
  • More information on Spinach Leafminer

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