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Tree Covered in Silk Webs in Scotland: Spindle Ermine Moth

Question: 25–30 ft trees covered in stocking-like webs, leaves shriveled with holes. Black berries in Sept. Aberdeenshire. Pest ID and control?

Answer

Spindle ermine moth. Webs enclose foliage; caterpillars feed inside. If caterpillars present, spray Orthene or Bt, or mechanically remove webs. Tree will refoliate next spring. More info.

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