Miticides are used to control Mites which are among the most difficult arthropod pests to control on ornamental plants. Adult mites have eight legs and piercing/sucking mouthparts that are used to suck fluids from the cells of host plants. The first immature stage of a mite, referred to as the larva, has only six legs, like insects. The exceptions are the Eriophyid mites, which have four legs in all stages. Mites are not insects, but are more closely related to spiders and ticks. Thousands of species of mites feed on plants.

Spider mites, members of the Tetranychidae family, are perhaps the most important mite pests of ornamental plants. The name, spider mites, is due to the many members of this family that produce silk webbing. Spider mites are medium-sized mites that feed on a wide variety of host plants from many different plant families. Some spider mites are bamboo, Lewis, southern red, spruce, tumid and twospotted mites.