Nuisance pests like particular flies, ants, or spiders that don't trigger major damage but could be a nuisance to humans. Galls on cherry caused by a mite, Eriophyes cerasicrumena The mites that induce most problems in the sector are classified as the spider mites. They're below 1 mm (0.04 in) https://reallivesocial.com/story5536188/5-essential-elements-for-crm