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Plum > Year-Round IPM Program > Fruit Development > Pest Mites and their Natural Enemies

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Identifying Spider Mites

Severe spider mite damage can lead to defoliation. Names link to more information on identification and management.

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Pacific spider mite
Pacific spider mite
Identification tip: Twospotted and Pacific spider mites are not easily distinguishable. Both have two black spots on their green and yellow bodies.

Two=spotted spider mite.
Twospotted spider mite
Identification tip: Twospotted and Pacific spider mites are not easily distinguishable. Both have two black spots on their green and yellow bodies.

Mites change change color according to age and host food
Pacific spider mite
During the season the color ranges from yellow to green to black depending on age and host food. All have dark spots.

Overwintering female spider mite
Overwintering female spider mite:
In the fall females turn red-orange before overwintering.

Spider mite eggs
Spider mite eggs
Identification tip: Eggs are minute, round and translucent, with color ranging from a light tan tone to light yellow. They are laid on leaf surfaces.

leaf stippling damage from spider mite
Leaf stippling damage caused by spider mites
Identification tip: Feeding by webspinning spider mites appears as a yellow stippling or spotting of tiny areas on the leaf surface, that give it a "sanded" worn appearance.

Statewide IPM Program, Agriculture and Natural Resources, University of California
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