Phyllocoptes gracilis (Nal.) occurs throughout the UK on cultivated and wild raspberry, and on loganberry. Where infestations are heavy, yellow blotches develop on the leaves of fruiting and first-year canes and vigour, yield and fruit quality are reduced. Damage is more prevalent on raspberries growing in a sheltered environment (such as behind hedges or walls, in natural depressions within fields, and especially in gardens). This leaflet contains information on the injuriousness, morphology, life-history, natural enemies, and control of the mite.