Notes on Saskatoon Berry Diseases: Entomosporium leaf and berry spot
This is the most serious disease of saskatoons. Small angular brown spots first develop on lower leaves and eventually cause leaves to yellow. Lesions may also develop on the petioles and cause leaf drop. Infected fruit has small, grey lesions and becomes disfigured and cracked.
Period of activity
The fungus overwinters on fallen leaves and twigs. New infections are favoured by rain in the spring and early summer.
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