Generally, spider mites prefer the undersides of leaves, but severe infestation will occur on both leaf surfaces as well as on the stems and fruits. They suck the sap of plant tissues. Damage by spider mites on beans is most serious in hot and dry conditions. Because they multiply very fast, they are able to destroy plants within a short period of time. icipe researchers report that a species of African nightshade has over time developed a sweet smelling mixture of compounds in its leaves thus when the mites reach the leaf’s surface, the “small hairs” on the leaf trap the pests, hindering their further movement. Additionally, the disturbance causes cracking of the glandular tips where they release secretions that contain foul smelling chemicals that prevent the pests from laying eggs.