Monterey B.t. RTU Biological Insect Killer, for Organic Gardening, 32 oz. Trigger Spray
Monterey B.t. RTU Biological Insect Killer, for Organic Gardening, 32 oz. Trigger Spray
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Monterey B.t. RTU Biological Insect Killer, for Organic Gardening, 32 oz. Trigger Spray

4.2 stars out of 64 reviews
(4.2)|
64 ratings

Key item features

  • Organic Insecticide: Insecticide that is organic and safe for use up to the day of harvest.
  • OMRI Listed: Certified for use in organic gardening by the Organic Materials Review Institute.
  • Effective Control: Controls worm and caterpillar populations in gardens and lawns.
  • Versatile Use: Suitable for fruits, vegetables, ornamentals, and shade trees around the home garden.
  • Easy Application: Comes in a 32 oz. ready-to-spray bottle for convenient application.
  • Eco-Friendly: Safe for birds, earthworms, and beneficial insects like honeybees and ladybugs when used as directed.
  • Targeted Action: Specifically affects the larval (caterpillar) stage of Lepidoptera insects.
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Current price is $17.4854.6 ¢/fl oz
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4.2 out of 5 stars
stars64 ratings35 reviews
How item rating is calculated
  1. 5 stars69% (44)
  2. 4 stars11% (7)
  3. 3 stars3% (2)
  4. 2 stars3% (2)
  5. 1 star14% (9)

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Showing 1-3 of 35 reviews

Sep 13, 2025
anonymous
Item details
Size: 32 oz.
5 out of 5 stars review

Verified Purchase

Satisfied, hoping label will disclose bee info.

Worked great. Caveat: I'm not sure how or if this product affects bees. It definitely worked on killing cabbage moths but after I used it, I got concerned about bees. Please research that question before using this product. I used this on my new Butterfly Bush which cabbage moths were destroying. The plant recovered from all the damage (many holes in its leaves). Next year I may try purchasing lady bugs to try to remedy the moth larvae problem. But I will also research whether or not this product is harmful to bees and whether the chemical ends up in the flowers (the chemical is sprayed on leaves). This year it saved my plant....

Helpful?3APTKQM4HLNT47656571
May 17, 2025
Dean
Item details
Size: 32 oz.
5 out of 5 stars review

Verified Purchase

Monterey BT Spray for Organic Gardening Works Well

Monterey BT Spray is essential to use on my petunias. This helps to prevent little bud worms from eating holes in the flowers.

Incentivized Review
Helpful?3APTKQM4HLNT47656571
Sep 19, 2024
John
Item details
Size: 32 oz.
5 out of 5 stars review

Verified Purchase

Bud worms are history!

I had bud worms chomping away at my petunias, but this spray did the job. Those worms never stood a chance. They are gone and my petunias are starting to bloom again. Love this product!!

Incentivized Review
Helpful?3APTKQM4HLNT47656571