Pacific Northwest Insect Management Handbook

Pine (Pinus)-Eriophyid mites

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Trisetacus spp.

Pest description and crop damage Microscopic, torpedo-shape mites that feed in needle sheaths, yellowing and distorting new needles.

See "Pine" in:

Christmas Tree Plantation Pests

Management-chemical control

  • carbaryl/oil has been used with success when applied three times about a week apart from mid-May into early June, or when new candles have elongated but before needles have fully elongated.

See:

Chemical Control of Nursery Pests

For more information

Johnson, W.T. and H.H. Lyon (1991), Insects That Feed on Trees and Shrubs, 2nd ed., Cornell University Press (p. 122).

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.

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