Q How do I recognise it?
A It starts as small purple spots on the canes in May or June. They gradually increase in size to form cankers which look like shallow white pits with a purple edge. The canes may die back, or produce distorted fruit.
Caption: Cane spot can reduce the amount of fruit your plants produce
Q Tell me more about it.
A The fungus Elsinoe veneta is responsible. It overwinters on affected canes. It also affects loganberries and hybrid berries.
Q How can I control cane spot?
A Affected canes cannot be treated. Cut them out in autumn.