Cecidophyopsis ribis is an eriophyid mite which is best known for being a plant parasite, a pest of Ribes spp., the genus that includes gooseberries and blackcurrants. It is commonly known as the blackcurrant gall mite or big bud mite. It feeds on the plants' buds, forms galls, and transmits a virus which causes blackcurrant reversion disease. The mite is a serious pest of blackcurrant crops in Europe, but rarely on other continents.