I have raspberries in three plots. Over the last three years, first a few and now most of the plants are showing damage. The leaves wrinkle and are generally smaller, the berries are small and in one bed all plants are affected and about half the bed is gone. A local garden centre (well respected) diagnosed the problem as water stress. It has been dry and I don't usually water the raspberries. One bed is hilled, the dieing bed is flat and the other patch is at another house. Earlier in the season I thought it might be spider mites; but I don't see any wildlife. Is this likely water stress or a disease I don't want to know about? If it is water stress is it too late to water the plants?

How it begins - leaves become paler, wrinkled, and leathery

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Leaf damage stunted cane

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leaves wrinkling on cane

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extreme leaf damage (a little browner than the picture) - this is the bed where the canes are dieing out. Two years ago they were 6ft canes with thumb sized berries.

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