July 1, 2025

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10 Best bt sprays of 2025

Save up to 28% off

Best Choice

1

Southern Ag
Southern Ag Thuricide BT For Control of Caterpillars & Worms, 1 Gallon - 128oz
Main highlights

Controls Caterpillars and Worms Effectively
This product is highly effective in controlling caterpillars and worms, including cabbage worms, bagworms, and moth caterpillars, ensuring healthier plants.

Ideal for Garden and Lawn Use
Perfect for use in gardens and lawns to eliminate pests like cabbage worms, bagworms, lawn moths, and other caterpillar infestations.

Highly Praised for Fast Results
Customers appreciate the quick results, often seeing dead pests within a day, and the product's ability to save plants from severe infestations.
9.9

Exceptional

Our Rating

9.1
Simple to use

8.7
worth the money

8.0
Aroma
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Real users impact

Thousands of users trust our site daily

Based on millions of stores and reviews

Shoppers influence our rankings
Analyzing top stores
Value for Money

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.
9.7

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.
9.6

Exceptional

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

28% Off
9.4

Excellent

Our Rating

9.7
Simple to use

9.3
worth the money

8.4
Aroma
5

Monterey
Monterey B.t. - Biological Insecticide for Organic Gardening - 1 Quart Concentrate - Apply Using a Sprayer Following Mix Instructions
Main highlights

Key Features
Targets caterpillars and worms, safe for bees/earthworms, OMRI Listed for organic gardening, easy water mix application.

Ideal Use Cases
Perfect for protecting vegetables like broccoli and tomatoes, and ornamentals from damaging worms without harming beneficial insects.

Customer Praise
Most reviews highlight its effectiveness against a variety of pests while being safe for the garden ecosystem and beneficial insects.
9.3

Excellent

Our Rating

9.9
lasts a long time

9.9
Easy to use

9.7
Simple to use
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6

Monterey

Monterey BT - Ready to Spray Bacillus Thuringiensis for Organic Worm and Caterpillar Control - 31oz
9.2

Excellent

Our Rating
7

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.
9.1

Excellent

Our Rating

9.1
Simple to use

8.9
worth the money

8.0
Aroma
8

Monterey

Monterey BT Spray for Plants Organic - Spray for Organic Worm and Caterpillar Control - 31 oz
8.8

Very Good

Our Rating
9

Southern Ag
Southern Ag 100520028 13021 Caterpillar Control, 8 oz

10% Off
Main highlights

Organic Insecticide with Low Toxicity
Southern Ag Thuricide Hpc Concentrate is an 8 oz organic insecticide, safe for humans and animals, effective on various plants and trees.

Ideal for Caterpillar and Worm Infestations
Best used on vegetables, fruits, shrubs, and trees to combat caterpillars, cutworms, leaf miners, and other pests. Effective even after rain.

Highly Effective Despite Horrible Smell
Customers consistently praise its effectiveness in eliminating caterpillars and worms, despite noting its unpleasant odor.
8.7

Very Good

Our Rating

9.7
Simple to use

8.9
worth the money

8.4
Aroma
10

Safer
Safer Brand 5163 Caterpillar Killer II Concentrate, 16 Oz For Insects
Main highlights

Key Features
Targets caterpillars, gypsy moth larvae, and more without harming beneficial insects. Organic, OMRI Listed, safe until harvest.

Ideal Use Cases
Perfect for organic gardening to protect tomatoes, cabbages, and other vegetables from damaging pests.

Customer Praise
Most reviews highlight its effectiveness in pest control, especially praising its safety for organic gardens.
8.6

Very Good

Our Rating

9.5
Simple to use

9.1
worth the money

8.4
Aroma

10 Best bt sprays of 2025

1

Southern Ag Thuricide BT For Control of Caterpillars & Worms, 1 Gallon - 128oz

9.1

8.7

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. - Biological Insecticide for Organic Gardening - 1 Quart Concentrate - Apply Using a Sprayer Following Mix Instructions

9.9

9.9

9.7

6

Monterey BT - Ready to Spray Bacillus Thuringiensis for Organic Worm and Caterpillar Control - 31oz

7

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

8

Monterey BT Spray for Plants Organic - Spray for Organic Worm and Caterpillar Control - 31 oz

9

Southern Ag 100520028 13021 Caterpillar Control, 8 oz

9.7

8.9

8.4

10

Safer Brand 5163 Caterpillar Killer II Concentrate, 16 Oz For Insects

9.5

9.1

8.4

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