Monterey B.t.

Monterey B.t. controls worms and caterpillars on fruits, vegetables, ornamentals, and shade trees in an easy-to-mix liquid concentrate form for organic gardening.
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Monterey B.t. is a naturally occurring material based on the bacteria Bacillus thuringiensis subspecies kurstaki. These naturally occurring products were discovered in the 1960's and have been used ever since for worm and caterpillar control. When the insects ingest the product, it causes a disease in their gut, causing them to stop feeding and eventually die.

This product only affects Lepidoptera insects (caterpillars and worm type insects.) OMRI listed for organic use.

Instructions for use: Mix with water and apply with a sprayer at 5-7 day intervals while insects are active. The product must be eaten by the insects to be effective. It is best to treat when the insects are small. It can be used up to and on the day of harvest.

  • For Fruits and Vegetables: Use 1.5 oz. per 3 gallons of water (1 Tbsp per gallon) and apply to 1000 sq ft.
  • For Ornamentals: Apply at 2 oz per 3 gallons of water (4 tsp per gallon).

Active Ingredient

  • Bacillus thuringiensis subspecies kurstaki strain SA-12 soilds, spores and Lepidopteran active toxins - 98.35%
  • Other ingredients - 1.65%


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