Twospotted spider mite

Tetranychus urticae

Twospotted spider mites have a wide host range. They can be found nearly any time of year, especially during hot, dry weather. Multiple generations occur each season.

two-spot spider adult
Adults: 0.7 to 1 mm.

Look for bronzed or bleached foliage. Leaves may have a stippled appearance and webbing may be present. Mites balloon on webbing to reach new food sources.


Mites are not insects; many insecticides are not effective against mites. When choosing specific miticides, look for those that will spare predatory mites. Predatory mites and other natural enemies help to control populations.

twospotted spider web

Soaps and summer oils can also be effective, and won’t have as lasting an impact on natural enemies.

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The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.