Raspberry leaf mite

The raspberry leaf mite, known scientifically as Eriophyes rubi, is a microscopic pest belonging to the Eriophyidae family. These mites have elongated, worm-like, whitish bodies that measure only about 0.2 mm, making them nearly invisible to the naked eye under normal field conditions.

This pest primarily attacks raspberry plants (Rubus idaeus). By feeding on the internal tissues of buds and leaves, the mites disrupt the plant's physiological processes, which often leads to poor development of the foliage and can significantly impact the plant's overall health.

These mites overwinter as adult females sheltered within the scales of the raspberry buds. Once spring temperatures begin to rise and the buds start to swell, the mites become active, migrating to young leaves and expanding floral structures to begin feeding and laying eggs.

Infestation signs include severe curling and deformation of young leaves, which often develop yellow or chlorotic patches. Heavy infestations frequently result in stunted cane growth and malformed, unmarketable berries, causing substantial losses in both fruit quantity and quality for the grower.

Integrated pest management includes the selection of certified mite-free planting stock and strict sanitation practices, such as pruning and destroying infested canes. Chemical control should be implemented using selective acaricides, ensuring all applications are conducted before flowering or after harvesting to ensure food safety.