blackcurrant gall or big bud mite (cecidophyopsis ribis). a lot of mites in the inside of the bud.

blackcurrant gall big bud mite cecidophyopsis ribis syn cecidiophyes eriophyes ribip phytoptus dangerous pest currants lot mites inside galls reversion damage plant disease black currant buds april virus ribes eriophyid spring nigrum yield transmitting serious reduced acari agriculture arachnida arachnids arthropod close crop eriophyidae fruit garden horticulture leaf leaves may pests photomicrograph soft ribis bud