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Pests and Their Damage at Postharvest

On this page
  • Pear psylla
  • Twospotted spider mite
  • Pear rust mite
  • Pearleaf blister mite
  • Pear slug
  • Codling moth
  • European red mite
  • Pear scab

Names link to more information on identification and management.

Click on photos to enlarge
Pear psylla eggs
Pear psylla eggs
Identification tip: Tiny, elongated, yellowish eggs, laid on or near fruit spurs or on underside of leaf next to midrib.
Pear psylla nymphs
Pear psylla nymph
Identification tip: Nymphs yellow bodied and encased in honeydew.
Twospotted spider mite
Twospotted spider mite adult
Identification tip: Greenish to yellow globe-shaped bodies with conspicuous dark spots.
Pear rust mite
Pear rust mite
Identification tip: Tiny, tan, wedge-shaped bodies, with the wider end at the head.
Pearleaf blister mite
Pearleaf blister mite
Identification tip: Tiny with white, long, slender, and striated body; located inside leaf blister. Immature forms resemble adults but smaller.
Pearleaf blister mite damage
Pearleaf blister mite damage
Identification tip: Leaf blisters 1/8 to 1/4 inch across, first red and later black.
Pear slug (pear sawfly)
Pear slug larva
Identification tip: Sluglike larva with blackish slimy coating.

Codling moth damage
Codling moth damage
Identification tip:  Two types of damage: stings—larva bores short distance into flesh; deep entries—larva bores to core and feeds in seed cavity.

European red mite
European red mite adult
Identification tip: Dark red with white spots at the base of 6 to 8 hairs on back.

Pear scab on leaves
Pear scab
Identification tip: Velvety, dark olive-to-black spots on leaves. (Later, leaf puckers, twists and eventually tears.)

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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