Sweet Orange Scab
Sweet orange scab is a disease caused by a fungus, which results in scab-like lesions primary on fruit and less frequently on leaves and twigs. The initial symptoms of sweet orange scab form on very young fruit as lesions that are slightly raised and pink to light brown. As the lesion expands, it becomes cracked or warty. The lesion color changes to yellowish brown and eventually to dark gray. Sweet orange scab can cause premature fruit drop and stunt young nursery trees and new field plantings, but has little impact on fruit quality. While there is no danger to humans, the blemished fruit has reduced marketability. Sweet orange and tangerine are common hosts, however all Citrus species are vulnerable.

www.aphis.usda.gov/plant-health/sweet-orange-scab
5 photos · 361 views