Bonide Thuricide BT Concentrate – 16 oz Ready-to-Mix Organic Caterpillar & Worm Control

Protect your garden with a ready-to-use solution

Bonide Thuricide BT Concentrate is a ready-to-mix insect control designed for organic home gardens. The product uses a Bacillus thuringiensis strain to target caterpillars and worm stages, while sparing birds, earthworms, and many beneficial insects when used as directed. It supports you in guarding vegetables, fruits, and ornamental plants right up to harvest day, offering a flexible option for ongoing garden care.

What it protects

• Controls caterpillar pests such as cabbage looper, hornworms, and tent caterpillars
• You can treat a wide range of plants, including broccoli, cauliflower, kale, mustard greens, eggplant, pepper, melons, tomatoes, cabbage, and more

How it works

• Active ingredient is a strain of Bacillus thuringiensis, a widely used organic insecticide
• Kills caterpillars and worms by ingestion; feeding stops within 2–3 days after consumption
• Approved for organic gardening and designed for careful, targeted use

Usage tips and real-life use cases

• Comes ready to mix with water; follow label directions for dilution and thorough plant coverage
• Apply when worms or caterpillars are first noticed for best results
• Suitable for use on fruits, vegetables, shade trees, and ornamentals
• Harvest can occur on the day of application when label instructions are followed

In everyday gardening, you might notice caterpillars nibbling on tomato leaves or hornworms on pepper plants. A quick mix-and-spray session can help protect new fruit and foliage while you continue enjoying your garden. The product’s organic designation and its selective action aim to support a balanced garden ecosystem rather than a broad-spectrum solution. Additionally, Thuricide BT Concentrate has no effect on birds, earthworms, or beneficial insects such as honeybees and ladybugs when used as directed.