University of Florida

Sunscald

Cause

Direct sunlight and heat.

Affects

Fruit.

Symptoms

Frequent on green fruit where a yellow to white patch develops on the side or top of fruit exposed to direct sun; a blister develops, shrivels, flattens into a paper-like surface often followed by secondary fungal invaders discoloring the epidermis and producing internal decay.

Favorable Conditions

Hot, dry weather when plants have had a loss of foliage due to foliar or wilt diseases, insects, pruning, mechanical injury, or associated with picking. Most commonly seen in fields with marked defoliation during late spring in peninsular Florida.

Sunscald Picture

sunscald
Image # 143
Sunscald-
initially white, blistered fruit areas with direct sun exposure that commonly shrivel and discolor due to secondary fungal invaders.