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Pests Threaten Conifers Warn Spruce Trees At Risk
MDA entomologist warns lay ornamental or shelterbelt plantings face spruce spider mite yellowheaded spruce sawfly spruce budworm and pine needle scale. Mite causes yellow or rusty needles with webbing. wash trees or treat with malathion or Kelthane. Sawfly defoliates. spray with malathion when yellowing appears, repeat in 10 to 14 days. Budworm overwinters as caterpillar and can destroy trees. spray in spring with malathion. Pine needle scale indicated by winter damage and drought. inspect before spraying.
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MDA