Disease development is favored by warm, humid weather. Spray with an approved fungicide. See the Seedling Disease Section for more information. Fruit has irregular yellow areas which follow a longitudinal alignment. The initial symptom on young leaves is a diffuse, mottled appearance.
Older leaves have irregular yellow areas which are interveinal.
The disease is associated with the presence of whiteflies. The nature of the geminivirus has not been determined, nor has the presence of other viruses been ruled out. Preliminary experiments by Dr. Brown suggest the virus is not seedborne. There are no control measures. Infected plants die suddenly from mid-summer to fall.