blackcurrant gall mite
noun
A minute elongated mite, Cecidophyopsis ribis (family Eriophyidae), which is a pest of currant and gooseberry bushes, especially blackcurrants, living inside the buds and causing the disease ‘big bud’.
Origin
Late 19th century; earliest use found in Eleanor Anne Ormerod (1828–1901), economic entomologist.