Twospotted Spider Mite
Tetranychus urtlcae Koch

These microscopic, eight-legged mites are lemon green in color and have a black spot on both sides of their bodies. Several spider mites in the Pacific Northwest have this general appearance. For simplicity, complexes of mite species are often referred to as one species. Damage usually starts on the underside of the leaf and heavy infestations produce abundant webbing. Mites suck sap from the cells causing a yellow stippling and eventual desiccation of the leaf. Host plants: alfalfa, beans, peas, sugarbeets, potatoes, ornamentals, fruit, cereals, corn.