Skip to content
  • 💸 Get more for your budget with low-priced deals! 💸
  • 💸 Get more for your budget with low-priced deals! 💸
Garden ToolsGarden Tools
    • No products in the cart.

      Return to shop

  • Cart

    No products in the cart.

    Return to shop

  • Lawn Sprayers & Spreaders
    • Power Sprayers
    • Spreaders
    • Backpack Sprayers
    • Sprayers
    • Applicators & Dispensers
    • Fertilizer Injection System
    • Pull Behind Sprayers
  • Irrigation Supplies & Equipment
    • Water Hoses
    • Hose Attachments
    • Sprinklers
    • Tree Watering Bags
    • Drip Irrigation Systems
    • Water Hose Reels
    • Watering Cans
  • Wheelbarrows & Carts
    • Wheelbarrows
    • Yard Carts
    • Flatbed Carts
    • Tree Carts
  • Pruning Tools & Equipment
    • Pruners
    • Pruning Saws
    • Pole Pruners and Saws
    • Loppers
    • Hedge Shears
    • Shear Cases
  • Gardening & Landscaping Tools
    • Scoops and Shovels
    • Spades
    • Push Brooms & Cleanup
    • Garden Hand Tools
    • Striking Tools
    • Garden Hoes
    • Yard & Garden Rakes
    • Utility Knives & Multitools
    • Garden Forks
    • Cultivators & Weeders
    • Logging & Clearing Tools
    • Turf & Sod Tools
    • Grafting Knife
  • Herbicide Insecticide & Fungicide
    • Insecticides
    • Post-Emergent Herbicides
    • Fungicides
    • Arbor care
    • Herbicide Surfactants
    • Pre-Emergent Herbicides
    • Pond Supplies
    • Lawn Weed Control
Herbicide Insecticide & Fungicide / Insecticides
Sale!
Monterey B.t. Biological Insecticide Concentrate,1 Gallon

Monterey B.t. Biological Insecticide Concentrate,1 Gallon

$119.45 Original price was: $119.45.$83.62Current price is: $83.62.

Buy Now
SKU: YW1SZ 278981182 Categories: Herbicide Insecticide & Fungicide, Insecticides
  • Fast reliable delivery options
  • Worry-Free Shopping with Safe Payments
  • Experience the difference quality makes.
  • Best price, safe shopping guarantee
Browse
  • Gardening & Landscaping Tools
    • Cultivators & Weeders
    • Garden Forks
    • Garden Hand Tools
    • Garden Hoes
    • Grafting Knife
    • Logging & Clearing Tools
    • Push Brooms & Cleanup
    • Scoops and Shovels
    • Spades
    • Striking Tools
    • Turf & Sod Tools
    • Utility Knives & Multitools
    • Yard & Garden Rakes
  • Herbicide Insecticide & Fungicide
    • Arbor care
    • Fungicides
    • Herbicide Surfactants
    • Insecticides
    • Lawn Weed Control
    • Pond Supplies
    • Post-Emergent Herbicides
    • Pre-Emergent Herbicides
  • Irrigation Supplies & Equipment
    • Drip Irrigation Systems
    • Hose Attachments
    • Sprinklers
    • Tree Watering Bags
    • Water Hose Reels
    • Water Hoses
    • Watering Cans
  • Lawn Sprayers & Spreaders
    • Applicators & Dispensers
    • Backpack Sprayers
    • Fertilizer Injection System
    • Power Sprayers
    • Pull Behind Sprayers
    • Sprayers
    • Spreaders
  • Pruning Tools & Equipment
    • Hedge Shears
    • Loppers
    • Pole Pruners and Saws
    • Pruners
    • Pruning Saws
    • Shear Cases
  • Uncategorized
  • Wheelbarrows & Carts
    • Flatbed Carts
    • Tree Carts
    • Wheelbarrows
    • Yard Carts
  • Description
  • Reviews (0)

Naturally controls the worms and caterpillars that feast on your plants!

Monterey B.t. Biological is an all-natural, OMRI-listed insecticide that targets worms and caterpillars. It contains the active ingredient kurstaki. Kurstaki is a subspecies of the naturally-occurring bacteria Bacillus thuringiensis. This is a one-gallon bottle.

Once ingested, Monterey B.t. causes disease in the digestive systems of worms and caterpillars. This sickness causes the insects to stop feeding and eventually die. Use Monterey B.t. Biological Insecticide on your fruits, vegetables, shade trees, and flowers.

You can safely apply Monterey B.t. Biological Insecticide at any time, including the day of harvest. For best results, apply directly to your plants at the first sign of an infestation. Mix at a rate of 2 fluid ounces per 3 gallons of water. This mixture covers up to 1,000 square feet. Also available in a Ready To Use formula.

Product Specs
  • Active ingredient: Bacillus thuringiensis kurstaki
  • Volume (gallons): 1
  • Mix rate: 2 fluid ounces per 3 gallons of water
  • Approximate mixture coverage area (square feet): 1,000
  • Approximate coverage area per bottle (square feet): 64,000
Product Warranty Information

Monterey B.t. Biological Insecticide Concentrate,1 Gallon -Garden Tools Down to Earth Guarantee web 2

  • This product is covered under A.M. Leonard’s exclusive 30-Day Down to Earth Guarantee. Click Here for more Details.
Product Features
  • All-natural OMRI-listed insecticide
  • Eliminates worms and caterpillars
Product Benefits
  • OMRI-listed safe for organic gardening
  • Works on fruits, vegetables, shade trees, and flowers
  • Safe to use up to and on the day of your harvest
Frequently Asked Questions
What is Monterey B.t. Biological Insecticide Concentrate?
Monterey B.t. Biological Insecticide Concentrate is an all natural insecticide that targets worms and caterpillars. It contains the active ingredient kurstaki, which is a subspecies of the naturally occurring bacteria Bacillus thuringiensis. It comes in a one gallon bottle.

How does Monterey B.t. Biological Insecticide Concentrate work?
Once ingested by worms and caterpillars, Monterey B.t. causes a disease in their digestive systems which causes them to stop feeding and eventually die.

Can Monterey B.t. Biological Insecticide Concentrate be used on fruits and vegetables?
Yes, Monterey B.t. Biological Insecticide Concentrate can safely be used on fruits and vegetables. It is also safe to use on shade trees and flowers.

When is the best time to apply Monterey B.t. Biological Insecticide Concentrate?
For best results, apply Monterey B.t. Biological Insecticide Concentrate directly to your plants at the first sign of an infestation. It can be safely applied at any time, including the day of harvest.

Additional Product Information
  • SDS
  • Label

Reviews

There are no reviews yet.

Be the first to review “Monterey B.t. Biological Insecticide Concentrate,1 Gallon” Cancel reply

Related products

Sale!
Imisol Micro-Injected Insecticide, Quarter Flat Of 24 4 ML Capsules
Quick View

Fungicides

Imisol Micro-Injected Insecticide, Quarter Flat Of 24 4 ML Capsules

$319.00 Original price was: $319.00.$95.99Current price is: $95.99.
Sale!
Gemini; Liquid Pre-Emergent Herbicide, 2-1/2 Gallons
Quick View

Herbicide Insecticide & Fungicide

Gemini; Liquid Pre-Emergent Herbicide, 2-1/2 Gallons

$375.00 Original price was: $375.00.$95.99Current price is: $95.99.
Sale!
Avenger Organic Herbicide Ready-to-Use, 24 Ounces
Quick View

Herbicide Insecticide & Fungicide

Avenger Organic Herbicide Ready-to-Use, 24 Ounces

$15.35 Original price was: $15.35.$10.75Current price is: $10.75.
Sale!
Roundup QuikPRO Herbicide Water Soluble 6.8lb Container
Quick View

Herbicide Insecticide & Fungicide

Roundup QuikPRO Herbicide Water Soluble 6.8lb Container

$159.45 Original price was: $159.45.$95.99Current price is: $95.99.
Sale!
Dinocide Micro-Injected Insecticide, Quarter Flat Of 288 4 ML Capsules
Quick View

Fungicides

Dinocide Micro-Injected Insecticide, Quarter Flat Of 288 4 ML Capsules

$326.00 Original price was: $326.00.$97.99Current price is: $97.99.
Sale!
Imisol Micro-Injected Insecticide, Quarter Flat Of 24 6 ML Capsules
Quick View

Fungicides

Imisol Micro-Injected Insecticide, Quarter Flat Of 24 6 ML Capsules

$329.00 Original price was: $329.00.$95.99Current price is: $95.99.
Sale!
Leonard Bio-Targetâ„¢ Insect, Slug, & Snail
Quick View

Herbicide Insecticide & Fungicide

Leonard Bio-Targetâ„¢ Insect, Slug, & Snail

$20.45 Original price was: $20.45.$14.32Current price is: $14.32.
Sale!
Super Trimec Post-Emergent Broadleaf Herbicide For Turf, 1 Gallon
Quick View

Herbicide Insecticide & Fungicide

Super Trimec Post-Emergent Broadleaf Herbicide For Turf, 1 Gallon

$149.95 Original price was: $149.95.$99.99Current price is: $99.99.
LEGAL
  • Privacy Policy
  • Shipping Policy
  • FAQ
  • Returns & Exchanges
  • Term and Conditions
CUSTOMER SERVICE
  • My account
  • Delivery
  • Payment Method
  • Contact Us
  • About Us
Signup for Newsletter

Sign up for exclusive offers, original stories, events and more.

    Copyright 2026 © www.gardener-tools.com
    • Lawn Sprayers & Spreaders
      • Power Sprayers
      • Spreaders
      • Backpack Sprayers
      • Sprayers
      • Applicators & Dispensers
      • Fertilizer Injection System
      • Pull Behind Sprayers
    • Irrigation Supplies & Equipment
      • Water Hoses
      • Hose Attachments
      • Sprinklers
      • Tree Watering Bags
      • Drip Irrigation Systems
      • Water Hose Reels
      • Watering Cans
    • Wheelbarrows & Carts
      • Wheelbarrows
      • Yard Carts
      • Flatbed Carts
      • Tree Carts
    • Pruning Tools & Equipment
      • Pruners
      • Pruning Saws
      • Pole Pruners and Saws
      • Loppers
      • Hedge Shears
      • Shear Cases
    • Gardening & Landscaping Tools
      • Scoops and Shovels
      • Spades
      • Push Brooms & Cleanup
      • Garden Hand Tools
      • Striking Tools
      • Garden Hoes
      • Yard & Garden Rakes
      • Utility Knives & Multitools
      • Garden Forks
      • Cultivators & Weeders
      • Logging & Clearing Tools
      • Turf & Sod Tools
      • Grafting Knife
    • Herbicide Insecticide & Fungicide
      • Insecticides
      • Post-Emergent Herbicides
      • Fungicides
      • Arbor care
      • Herbicide Surfactants
      • Pre-Emergent Herbicides
      • Pond Supplies
      • Lawn Weed Control
    • Login

    Login

    Lost your password?

    Register

    Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy.