Pacific Northwest Insect Management Handbook

Crabapple (Malus)-San Jose scale

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Image related to Crabapple (Malus)-San Jose scale
San Jose scale
Quadraspidiotus perniciousus Comstock
Adult immature
© Ken Gray Insect Image Collection
Image related to Crabapple (Malus)-San Jose scale
San Jose scale
Quadraspidiotus perniciousus Comstock
Showing damage
© Ken Gray Insect Image Collection

A "crust" of San Jose scales from apple fruit

M. R. Bush, WA State University

Quadraspidiotus perniciosus

See:

Common Pests of Nursery Crops

Related Links

Kaur, N. (Ed.). 2024 Pacific Northwest Insect Management Handbook.
© Oregon State University.

Use pesticides safely!

  • Wear protective clothing and safety devices as recommended on the label. Bathe or shower after each use.
  • Read the pesticide label—even if you’ve used the pesticide before. Follow closely the instructions on the label (and any other directions you have).
  • Be cautious when you apply pesticides. Know your legal responsibility as a pesticide applicator. You may be liable for injury or damage resulting from pesticide use.

Trade-name products and services are mentioned as illustrations only. This does not mean that the participating Extension Services endorse these products and services or that they intend to discriminate against products and services not mentioned.