Botrytis leaf blight
Crop: Onion Disease: Fungal Pathogen: Botrytis squamosa
SYMPTOMS AND SIGNS
DISEASE DEVELOPMENT
DISEASE MANAGEMENT
- Spots often surrounded by slivery-white ‘halo’. Active lesions are grayish-white colour. Small (1 to 5 mm) grayish-white oval shaped lesions. Older lesions tend to be brownish-white and desiccated (dehydrated or dried out). When numerous lesions are present the leaf tips begin to dieback, eventually affecting the entire leaf.
- The first symptoms begin as small white spots that are surrounded by a greenish halo. Centers of spots often are tan.