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

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Tomato > Leaves > Discolored leaves

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  • Image: Sunscald 1
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Sunscald
Abiotic

  • Affects fruit, young leaves and stems
  • Occurs only on tissue exposed to the sun
  • Fruit turns tan or white on exposed side, may dry out and appear wrinkled
  • Young leaves of transplants turn grey with irregular bands on the lower side
  • Young stems of transplants turn white on exposed side only
  • More information on Sunscald...
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  • Image: 1
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  • Image: 3

Verticillium Wilt
Verticillium albo-atrum, Verticillium dahlia

  • A yellow wedge shaped lesion on leaf often with a brown center
  • Leaves yellow and wilt, often one side only
  • Lower leaves wilt first, eventually whole plant wilts
  • In a lengthwise cut of the stem near the soil line, veins are tan, center is green
  • Common in cool temperatures 68° to 75° F
  • More information on Verticillium Wilt...
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  • Image: Virus 1
  • Image: Virus 2
  • Image: Virus 3

Virus
Cucumber mosaic virus, tomato mosaic virus, tomato
spotted wilt virus
and more

  • Leaves are mottled with yellow and light green patches
  • Leaves are misshapen; unusually long and thin like a shoestring or curled and deformed
  • Fruit have yellow blotches or brown rings
  • Plants are stunted even when neighboring plants look healthy and tall
  • More information on Virus...
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  • Image: Cold injury 1
  • Image: Cold injury 2

Cold injury

  • Leaves look water-soaked and soft, then turn black
  • Fruit becomes soft water-soaked and rots
  • Leaves show injury immediately, fruit may not show symptoms for 5 to 7 days
  • Occurs at temperatures below 50° F

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