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Pests Monitored During Dormancy/Delayed Dormancy

On this page
  • European red mite
  • Pear rust mite
  • Pearleaf blister mite
  • Twospotted spider mite
  • Predatory mites
  • San Jose scale
  • Pear psylla
  • Mealybug (grape, obscure)
  • Pear scab lesions

Names link to more information on identification and management.

Click on photos to enlarge

European red mite egg
European red mite eggs
Identification tip: Globular and red with a slender stalk (stipe) rising from the top center.

Pear rust mite
Pear rust mite
Identification tip: Tiny wedge-shaped, tan females overwinter beneath bud scales, mostly on 1- to 2-year-old wood.
Pearleaf blister mite
Pearleaf blister mite (adults, nymphs)
Identification tip: Tiny with a white, striated, long and slender body.
Twospotted spider mite
Twospotted spider mite adult
Identification tip: Overwintering females orange, and found under bark scales on trees and in trash on the ground.
Western predatory mite
Predatory mite (spider mite natural enemy)
Identification tip: Larger than twospotted spider mite, pear shaped and ranges from translucent cream to amber-red.
San Jose scale
San Jose scale black cap stage
Identification tip: Overwinters in black cap stage. Small with roundish black cover.
Pear psylla eggs
Pear psylla eggs
Identification tip: Tiny, elongated yellowish eggs laid on or near fruit spurs starting in late January to mid-February.
Pear psylla
Pear psylla adult
Identification tip: Resembles tiny cicada; transparent wings held rooflike over dark to reddish brown body when at rest; wings with dark spot on middle of top edge.
Mealybugs (grape, obscure) egg mass
Identification tip: Yellowish to orange eggs laid on a white, cottony mass located under the bark.

Mealybugs (grape, obscure) crawlers
Identification tip: Brownish orange, soft, segmented, oval bodies; lightly coated with white waxy secretion.

Pear scab lesions
Pear scab lesions
Identification tip: Dark, oval, sunken lesions on one-year- old shoots and spurs.

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

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