Biological Caterpillar & Webworm Control

Contains BTK. (OMRI listed for organic production)

Summit's Biological Caterpillar and Webworm Control is an Easy-to-Mix Liquid concentrate. The active ingredient is Bacillus thuringiensis subsp. kurstaki (BTK), a species specific biological larvicide that kills only leaf eating caterpillar pests (Lepidoptera).

  • Biological control for destructive caterpillar pests
  • Will not harm birds, earthworms, or beneficial insects such as honeybees and ladybugs OMRI listed and approved for use in organic gardening
  • May be used on edible plants, fruits, and vegetables up to day of harvest
  • Same active ingredient as "Dipel" and "Thuricide"

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Click Below for:
Biological Caterpillar & Webworm Control
- Pint Concentrate: Label | SDS
- Quart Concentrate: Label | SDS
- Quart Hose-End Spray: Label | SDS

Product Info

Targeted for

Biological Caterpillar & Webworm Control targets “soft-bodied” insect pests. Instead of poisoning, the oil suffocates or “smothers” these insects and their eggs. The oil spray blocks an insect’s air holes (spiracles), causing it to die from asphyxiation. These oils kill a wide variety of insect pests such as aphids, scale, adelgids, whiteflies, spider mites, mealybugs, thrips, and more. As horticultural oils must cover the target pest to be effective, there is no long term residual effect.