Russet mites belong to the eriophyid family of mites, and between around 100 plant-specific species, is among the hardest to detect. A single mite is too tiny to be seen by the naked human eye. They need magnification of 10x and higher. Since they are so microscopic, they can be a huge threat for your garden without you even realizing. These plant pests leave no webs or secretions., and the visible damage the first indication of their presence.