Summit's Biological Caterpillar and Webworm Control is a liquid concentrate that's easy to mix. It contains Bacillus thuringiensis subsp. kurstaki (BTK), a species-specific biological larvicide that targets and kills only leaf-eating caterpillar pests (Lepidoptera).

  • Biological control for harmful caterpillar pests
  • Safe for birds, earthworms, and beneficial insects like honeybees and ladybugs
  • OMRI listed and approved for use in organic gardening
  • Can be used on edible plants, fruits, and vegetables up to the day of harvest
  • Contains the same active ingredient as "Dipel" and "Thuricide"