Wood/Cane Cankers
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Wood/cane cankers (Botryosphaeria, etc.) can occur in vineyards when plants are stressed and weakened. Canker-causing fungi enter woody tissue through wounds, such as pruning cuts, mechanical injury, and insect damage.
Botryosphaeria canker symptoms on cordons.
(Photo: Melodie Putnam, Oregon State University Plant Clinic)
Cross section of Botryosphaeria-infected vine.
(Photo: Melodie Putnam, Oregon State University Plant Clinic)
Management:
- Practice proper sanitation (remove and destroy infected vines).
- Promote plant vigor.
- Avoid wounding (mechanical or physical damage, insect wounds).