Severe spider mite infestation in an adzuki bean crop. Note the silvering of the lower leaf surface and white stippling on the upper surface of some leaves from a very dense population of spider mites feeding on these leaves.

Severe spider mite infestation in an adzuki bean crop. Note the silvering of the lower leaf surface and white stippling on the upper surface of some leaves from a very dense population of spider mites feeding on these leaves.

Photo Source: Lindsey du Toit, Washington State University