Monterey B.t. RTU - 32-fl oz Spray


Get rid of those pesky worms and caterpillars! This biopesticide works by introducing bacterial spores and toxins into the body of the insect larvae as it feeds on foliage. These toxins quickly disrupt, and soon completely stop, normal digestive functions of the pest insect. For best results, use at the beginning of the pest's lifecycle (1st & 2nd instars).

Key Product Features:

  • This pest control is designed for use on caterpillars and worm type insects in a home garden setting.
  • Safe for earthworms & bees - when used as directed, Monterey B.t. has no effect on birds, earthworms, or beneficial insects such as honeybees or ladybugs.

  • Organic gardening -OMRI listed and approved for organic gardening.

  • Easy to apply - Ready to use spray!


Bagworms, cabbage loopers, elm spanworm, fall cankerworm, fall webworm, spongy moth, imported cabbage worm, spring cankerworm, tent caterpillars, tomato hornworm, and more.

Btk is not an effective control for corn earworm or squash vine borer.


Foliage protector - this insecticide is safe for use on a variety of plants including broccoli, celery, cabbage, turnip greens, mustard greens, cauliflower, melons, lettuce, tomatoes, shade trees, ornamentals, and many more. Can be used on edible plants up to the day of harvest.