Blackcurrant gall mite

Systematic position: Cecidophyopsis selachodon belongs to the order Acariformes and the family Eriophyidae (gall mites). It is a microscopic pest that specializes in invading the buds of its host plants, causing significant physiological disruption.

Host plants: This mite primarily targets members of the Ribes genus, with blackcurrant being the most susceptible crop. The pest is highly host-specific, concentrating its efforts within the reproductive and vegetative buds of the shrub.

Biology and lifecycle: The lifecycle of Cecidophyopsis selachodon is closely synchronized with the phenology of the currant bush. Adult females overwinter inside infested buds. As temperatures rise in spring, the mites resume feeding and reproduction. The population expands through several overlapping generations during the growing season as mites migrate to colonize new buds.

Damage and economic impact: The hallmark symptom of an infestation is the presence of swollen, spherical buds that fail to develop into normal foliage or flowers. This damage significantly reduces the yield potential of the plant. Furthermore, the mite acts as a vector for various plant pathogens, further degrading the health and longevity of the crop.

Control measures: Management of the gall mite requires strict adherence to agricultural protocols:

• Strict use of pest-free, certified nursery stock for planting.
• Physical removal and destruction of infested buds during the dormant or early spring season.
• Targeted application of acaricides during the critical migration period of the mites.
• Selecting and planting resistant cultivars that naturally limit mite colonization.