Spider mites and other mites
such webs in which the mites live. The webbing and spotting on the leaves affect the appearance of the crop. This is of particular concern in ornamental [...] of them are common crop pests. The two-spotted spider mite , Tetranychus urticae , is by far the most important species in greenhouses and many outdoor crops [...] to the host plant by feeding on plant sap. They mainly occur on the underside of leaves where they pierce the cells and suck out the contents. The empty