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Coneflower Stem Damage: Caterpillar or Borer Activity

Coneflowers "cut off" 2 inches below flower with black line on stem; flowers hang from cut.

Diagnosis

Likely caterpillar or borer insect. Capture specimen for ID—check flowers at various times, especially evening. Take to nursery for accurate identification.

Management

Once identified, apply appropriate insecticide or Bacillus thuringiensis for caterpillars. Regular monitoring catches early damage.

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