Unless Cane Spot affects large parts of the canes (and other parts of the bush) they
are probably best ignored. Regular clearing of debris at the base of the
plant will prevent it's spread. In addition, ensure that all canes which
have produced fruit are removed as soon as possible.
the disease does take hold, the young shoots will shrivel. In these cases,
the treatment is to spray with a copper fungicide and cut out the worst affected canes.
Spot is a fungus which over-winters on the canes, springing back into life
late Spring to early summer.
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