The mites attack the buds and inhibit elongation of the shoot; the result is a visible configuration of the affected structure somewhat similar to a rosette. There is considerable crowding and bunching together of malformed, stunted, thickened shoots and aborted buds with short outgrowths.

- Hartford Keifer, Edward Baker, Tokuwo Kono, Mercedes Delfinado, William Styer: (1982) An Illustrated Guide to Plant Abnormalities Caused by Eriophyid Mites in North America^©