10 Best bt sprays of 2026

Save up to 27% off

1

Bonide
Bonide Captain Jack's Thuricide BT, 128 oz Ready-to-Use with Sprayer, Kills Worms and Caterpillars in Home Garden, For Organic Gardening
Main highlights

Key Features
Fast-acting, organic spray controls harmful insects within 2-3 days without harming beneficial ones. Safe for edible plants up to harvest day.

Ideal Use Cases
Perfect for gardeners battling cabbage loopers, hornworms, and tent caterpillars on fruits, vegetables, trees, and ornamentals.

Customer Reviews Highlight
Users praise its effectiveness in organic gardening and its ease of use with the ready-to-use trigger sprayer.
9.8

Exceptional

Our Rating

8.7
Simple to use

8.0
worth the money

8.0
Aroma
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2

Bonide
Bonide Captain Jack's Thuricide BT, 128 oz Ready-to-Use with Sprayer, Kills Worms and Caterpillars in Home Garden, For Organic Gardening
Main highlights

Key Features
Fast-acting, organic spray controls harmful insects within 2-3 days without harming beneficial ones. Safe for edible plants up to harvest day.

Ideal Use Cases
Perfect for gardeners battling cabbage loopers, hornworms, and tent caterpillars on fruits, vegetables, trees, and ornamentals.

Customer Reviews Highlight
Users praise its effectiveness in organic gardening and its ease of use with the ready-to-use trigger sprayer.
9.6

Exceptional

Our Rating

8.7
Simple to use

8.0
worth the money

8.0
Aroma
3

Bonide
Bonide 8066 Captain Jack's Bacillus Thuringiensis BT Organic Worm & Caterpillar Control, 32 oz. Ready-to-Us - Quantity 1
Main highlights

Key Features and Benefits
Controls various worms and caterpillars on fruits and vegetables, safe for beneficial insects, and approved for organic gardening.

Ideal Use Cases
Perfect for broccoli, tomatoes, and ornamentals when first signs of caterpillars or worms appear, ensuring a bountiful, damage-free harvest.

Customer Praise
Highly praised for its effectiveness, ease of use with the ready-to-use sprayer, and environmental safety, particularly around beneficial insects.
9.5

Excellent

Our Rating

9.5
Simple to use

8.7
worth the money

8.0
Aroma
4

Southern Ag

Southern Ag Thuricide BT Caterpillar Control, 16oz - Pint

27% Off
9.3

Excellent

Our Rating

9.7
Simple to use

9.3
worth the money

8.4
Aroma
5

Monterey

Monterey B.t. Bundled with Measuring Spoon - Caterpillar & Worm Killer Organic Gardening - Apply with Sprayer - 8 oz
9.2

Excellent

Our Rating
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6

Monterey

Monterey B.t. Bundled with Measuring Spoon - Caterpillar & Worm Killer Organic Gardening - Apply with Sprayer - 8 oz
9.1

Excellent

Our Rating
7

Monterey

Monterey B.t. Bundled with Measuring Spoon - Organic Caterpillar Killer - Ready to Use Spray - 32 oz
8.9

Very Good

Our Rating
8

Bonide
Bonide Thuricide BT Concentrate, 16 oz Ready-to-Mix Solution for Caterpillar, Worm and Moth Control in Home Garden
Main highlights

Key Features
Eco-friendly insecticide for fruits, vegetables, and ornamentals. Kills worms and caterpillars without harming beneficial insects, approved for organic gardening.

Ideal Use Cases
Best for cabbage, broccoli, kale, tomatoes, and more. Perfect for controlling cabbage loopers, hornworms, and tent caterpillars on edible and ornamental plants.

Customer Praise
Highly praised for its effectiveness in stopping worm damage quickly, with noticeable results in 2-3 days, and for being safe around beneficial insects.
Key specs
- duration:2-3 days
- target species:Worms, caterpillars
- active ingredients:Bacillus thuringiensis
- formulation:Concentrate
- scent:N/A
8.8

Very Good

Our Rating

9.1
Simple to use

8.9
worth the money

8.0
Aroma
9

Bonide
Bonide Thuricide BT Concentrate, 16 oz Ready-to-Mix Solution for Caterpillar, Worm and Moth Control in Home Garden
Main highlights

Key Features
Eco-friendly insecticide for fruits, vegetables, and ornamentals. Kills worms and caterpillars without harming beneficial insects, approved for organic gardening.

Ideal Use Cases
Best for cabbage, broccoli, kale, tomatoes, and more. Perfect for controlling cabbage loopers, hornworms, and tent caterpillars on edible and ornamental plants.

Customer Praise
Highly praised for its effectiveness in stopping worm damage quickly, with noticeable results in 2-3 days, and for being safe around beneficial insects.
Key specs
- duration:2-3 days
- target species:Worms, caterpillars
- active ingredients:Bacillus thuringiensis
- formulation:Concentrate
- scent:N/A
8.7

Very Good

Our Rating

9.1
Simple to use

8.9
worth the money

8.0
Aroma
10

Monterey

Monterey BT - Bacillus Thuringiensis for Organic Worm and Caterpillar Control Bundled with Measuring Spoon - Concentrate for BT Spray - 16 oz
8.6

Very Good

Our Rating

10 Best bt sprays of 2026

1

Bonide Captain Jack's Thuricide BT, 128 oz Ready-to-Use with Sprayer, Kills Worms and Caterpillars in Home Garden, For Organic Gardening

8.7

8.0

8.0

How do we rank?

How do we rank?

Analyzing top stores

2

Bonide Captain Jack's Thuricide BT, 128 oz Ready-to-Use with Sprayer, Kills Worms and Caterpillars in Home Garden, For Organic Gardening

8.7

8.0

8.0

3

Bonide 8066 Captain Jack's Bacillus Thuringiensis BT Organic Worm & Caterpillar Control, 32 oz. Ready-to-Us - Quantity 1

9.5

8.7

8.0

4

Southern Ag Thuricide BT Caterpillar Control, 16oz - Pint

9.7

9.3

8.4

5

Monterey B.t. Bundled with Measuring Spoon - Caterpillar & Worm Killer Organic Gardening - Apply with Sprayer - 8 oz

6

Monterey B.t. Bundled with Measuring Spoon - Caterpillar & Worm Killer Organic Gardening - Apply with Sprayer - 8 oz

7

Monterey B.t. Bundled with Measuring Spoon - Organic Caterpillar Killer - Ready to Use Spray - 32 oz

8

Bonide Thuricide BT Concentrate, 16 oz Ready-to-Mix Solution for Caterpillar, Worm and Moth Control in Home Garden

9.1

8.9

8.0

9

Bonide Thuricide BT Concentrate, 16 oz Ready-to-Mix Solution for Caterpillar, Worm and Moth Control in Home Garden

9.1

8.9

8.0

10

Monterey BT - Bacillus Thuringiensis for Organic Worm and Caterpillar Control Bundled with Measuring Spoon - Concentrate for BT Spray - 16 oz

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