Our rankings are generated through the algorithmic analysis of thousands of customer reviews about products, brands, merchant customer service levels, popularity trends, and more. We use advanced technology, including AI, to help process and organize this information at scale, supporting our analysis with greater speed and consistency. The rankings reflect our opinion and should be a good starting point for shopping.
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10 Best bt sprays of 2026
Save up to 30% off
Best Choice1
Bonide9.9Exceptional
Bonide Captain Jack's Bacillus Thuringiensis BT, 32 oz
23% Off-
product dimensions:2.5 x 4.88 x 11.88 inches
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country of origin:USA
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item weight:2.33 pounds
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customer reviews:4.6 4.6 out of 5 stars 3,371 ratings 4.6 out of 5 stars
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asin:B01LYXXTZF
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Value for Money2
Southern Ag9.7Exceptional
Southern Ag Thuricide BT Caterpillar Control, 16oz - Pint
10% Off-
target species:Dog
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product dimensions:4 x 1.75 x 6 inches
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specification met:OMRI
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item weight:9.9 ounces
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item model number:13022
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3
Monterey9.4Excellent
Monterey B.t. Bundled with Measuring Spoon - Caterpillar & Worm Killer Organic Gardening - Apply with Sprayer - 32 oz
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4
Bonide9.2Excellent
Bonide Captain Jack's Thuricide BT, 128 oz Ready-to-Use with Sprayer, Kills Worms and Caterpillars in Home Garden, For Organic Gardening
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product dimensions:4.63 x 7.5 x 12 inches
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country of origin:USA
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item weight:8.87 pounds
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customer reviews:4.5 4.5 out of 5 stars 266 ratings 4.5 out of 5 stars
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asin:B074G46K6X
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5
Safer9.1Excellent
Safer Brand Caterpillar Killer II Concentrate Spray, 16 fl oz
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target species:N/A
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product dimensions:2.2 x 4.03 x 6.18 inches
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specification met:N/A
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item weight:1.02 pounds
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item model number:5163-6
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6
Bonide8.9Very Good
Bonide Captain Jack's Deadbug Brew Ready-to-Use Spray, 32 oz Outdoor Insecticide and Mite Killer for Organic Gardening
30% Off-
target species:N/A
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product dimensions:2.5 x 4.88 x 11.88 inches
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specification met:N/A
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item weight:2.36 pounds
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item model number:2506A
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7
Southern Ag8.8Very Good
Southern Ag Thuricide BT For Control of Caterpillars & Worms, 1 Gallon - 128oz
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8
Monterey8.7Very Good
Monterey BT - Bacillus Thuringiensis for Organic Worm and Caterpillar Control Bundled with Measuring Spoon - Concentrate for BT Spray - 16 oz
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9
Monterey8.6Very Good
Monterey B.t. Caterpillar & Worm Killer, 8 oz with Spoon
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10
Bonide8.5Good
Bonide Thuricide BT Concentrate, 16 oz Ready-to-Mix Solution for Caterpillar, Worm and Moth Control in Home Garden
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target species:N/A
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product dimensions:2.13 x 4 x 6.75 inches
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specification met:N/A
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item weight:1 pounds
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item model number:803
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