Biological equilibrium: Pests are Element of the purely natural ecosystem and add to maintaining ecological equilibrium. Galls on cherry a result of a mite, Eriophyes cerasicrumena The mites that result in most trouble in the field will be the spider mites. They are below one mm (0.04 in) in diameter, https://210list.com/story20566219/the-greatest-guide-to-pest-control-crm