Notes on Saskatoon Berry Diseases
Entomosporium leaf and berry spot
Identification
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.
Symptoms of Entomosporium leaf
and berry spot
Period of activity
The fungus overwinters on fallen leaves and twigs. New infections are
favoured by rain in the spring and early summer.
Management Notes
- Adjust plant density and pruning practices to provide adequate airflow
through the row.
- Control weeds in the row and use trickle irrigation rather than overhead
sprinklers.
- Several fungicides are labelled for control of this disease. See Saskatoon
Berry Calendar.
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