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Spider Mites

Spider mites are common parasites on many different crops and houseplants. Spider mites are commonly found on the underside of leaves where they suck on plants. When plants are infested with spider mites, the leaves may turn yellow and fall off. If a plant appears affected, check the underside of the leaves for mites or their webbing. As adults, spider mites have 8 legs and are very difficult to see with the naked eye. One may need a magnifying glass to see the tiny mites. Spider mites are not insects but belong to a group called arachnids, which includes ticks, spiders, and scorpions.

There are many species of spider mites and one species may be more common in your area than another. Consider contacting your local Cooperative Extension Service for help identifying a pest.

Control tips:

If you have questions about this, or any pesticide-related topic, please call NPIC at 1-800-858-7378 (8:00am - 12:00pm PST), or email us at npic@ace.orst.edu.

Additional Resources:

Last updated January 30, 2013

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