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The vigour and cropping potential of blackcurrants can be reduced by heavy infestations of big bud mite.
Blackcurrant big bud
Blackcurrant big bud mites are microscopic, much less than 1mm in length. They live inside the dormant buds and suck sap from the embryonic leaves. They cause infested buds to become abnormally swollen and rounded. The mite also spreads reversion disease.
No pesticides are available to home gardeners for the control of blackcurrant big bud mite.
Blackberry and hybrid berry: pruning and training
Currant and gooseberry leafspot
Gooseberries, red and white currants
Raspberry leaf and bud mite
Red berry mite
Scientific paper on blackcurrant reversion disease
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