What caused the green patterns and discoloration on this pumpkin?
Circular patterns and discoloration on pumpkin are the result of a viral infection.
Justin Ballew, ©2024, Clemson Extension
The circular patterns and discoloration on this pumpkin are the result of a viral infection. Viruses are common in fall cucurbit crops in South Carolina. Most cucurbit viruses are transmitted by aphids, though one, squash mosaic virus, is transmitted by cucumber beetles. Viruses commonly cause discoloration and mosaic patterns, as seen here, but may also mimic herbicide damage. Warts are another common symptom that folks may see when picking out their fall pumpkins. Read more about cucurbit viruses here.
