3.2.6 Currants and berries

Abstract

Publisher Summary Eriophyoids are of economic importance in the cultures of various small fruits—black and red currants, blueberry, and blackberry. This chapter discusses the biology, injuriousness, natural enemies, and pest management in the case of currants and berries. 18 species of eriophyoids have been found on Ribes spp. and the majority on black currant, R. nigrum L. Among these species, Cecidophyopsis ribis appears to be the most noxious, because it causes direct damage to the buds and indirect damage to the plant. C. ribis occurs mainly in Europe and is commonly called “black currant bud mite” or “big bud mite.” The life cycle consists of a free-living phase during migration and a bud-confined phase. On black currant, C. ribis causes abnormal irregular growth of buds, especially of the basal and apical ones, called “big buds.” These buds become ovoid as a consequence of mite infestation. They usually dry out in the spring, either blocking the development of leaves and flowers or producing asymmetrical and malformed leaves. However, parasitization by fungal pathogens may have an impact on C. ribis populations.