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Caterpillars on Redbud and Bagworms on Cedar: Control Guide

Green Worms on Redbud, Bags on Cedar

Redbud caterpillars: Likely redbud leaffolder or generalist caterpillars. Bagworms on cedar: Classic host.

Unified Treatment

  • Bt (Bacillus thuringiensis): Spray foliage when caterpillars are small (early instars). Must be ingested.
  • Contact insecticides: Acephate (Orthene), bifenthrin, carbaryl, spinosad – work on all sizes, kill on contact/ingestion.

Bagworm Specifics

  • Mechanical: Hand-pick bags in fall/winter; destroy.
  • Timing: Spray in June when bags are small. Late sprays fail.

One product (e.g., Orthene) handles both pests. Follow label rates.

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