WSU Extension

Hortsense

Tomato : Sunscald
(revision date: 8/24/2015)


Biology
Sunscald of tomato fruits frequently occurs in hot, dry weather, but may occur whenever green fruit is suddenly exposed to direct sun. The sunward side of green fruit develops a yellowish, light brown, or white leathery patch, which may become wrinkled or blisterlike as the fruit matures. On ripe tomatoes, the damaged areas appear as flattened, grayish-white patches with a papery texture. The spots are sometimes attacked by rot organisms, causing fruit decay.
Management Options

Non-Chemical Management
  • Plant varieties with good foliage density.
  • Use care when pruning plants, so that fruits are not suddenly exposed to the sun.
  • Prevent or control diseases which cause leaf loss.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images
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Caption: Sunscald
Photo by: F. Buajaila
Caption: Sunscald
Photo by: C. Miles