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Botrytis leaf blight

Botrytis leaf blight

Crop: Onion Disease: Fungal Pathogen: Botrytis squamosa

  • 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.

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