Bonide Thuricide Organic Insect Killer Liquid Concentrate, 16 oz

Regular price $19.99

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Thuricide BT Caterpillar & Worm Killer Concentrate, 16 oz

Bonide Thuricide is a Bacillus thuringiensis (Bt) liquid concentrate formulated to control caterpillars and leaf-eating worms on vegetables, fruits, shade trees, and ornamentals. Approved for organic gardening, it stops feeding quickly after ingestion and can be applied up to the day of harvest.


Key Features:

  • Organic BT Control: Uses Bacillus thuringiensis to target caterpillars and leaf-eating worms while sparing beneficial insects
  • Wide Use Sites: Safe for listed vegetables, fruits, shade trees, and ornamentals; apply up to day of harvest
  • Fast Feeding Stop: Ingested by pests; feeding stops quickly and death occurs within 2–3 days
  • Easy Mixing: Ready-to-mix liquid concentrate for tank, hose-end, or hand sprayers
  • Low Odor, Targeted Action: Designed for outdoor use without harming birds or earthworms

Specifications Table:

Specification Details
Sub-Brand Thuricide
Active Ingredient Bacillus thuringiensis (Bt)
Container Size 16 oz (473 mL)
Form Liquid Concentrate
Concentrated or Ready to Use Concentrated
Use Sites Vegetables, fruits, shade trees, ornamentals (see label)
Pest Type Caterpillars/loopers, leaf-eating worms, gypsy moth larvae
Organic Yes (approved for organic gardening)
Indoor/Outdoor Outdoor
Coverage Area Up to 10,875 sq ft (per label rates)
Packaging Type Bottle
Odorless No
Safe for Children and Pets Use as directed; do not state safe—follow label
For Hydroponic Use No
Net Contents 16 FL OZ
Dimensions (package) 7 in H x 4 in W x 2.2 in L
Package Weight 1.2 lb

Frequently Asked Questions (FAQ):

Q: What pests does this control?
A: Targets tent caterpillars, tomato hornworm, cabbage looper, cutworm, leafroller, orange dog, gypsy moth larvae, and other listed caterpillars.


Q: Is it safe for organic gardens?
A: Yes. The Bt active ingredient is approved for organic gardening.


Q: How do I apply it?
A: Shake well, dilute with water per label rates, and spray upper and lower leaf surfaces; reapply weekly or after heavy rains.


Q: Can I use it on edible crops?
A: Yes, on listed fruits and vegetables; follow label directions and pre-harvest intervals (can be applied up to day of harvest).


Q: Will it harm beneficial insects?
A: When used as directed, it targets caterpillar stages and does not harm birds, earthworms, honeybees, or ladybugs.


Garden Elegance, Naturally Protected

Thuricide brings a quiet confidence to the garden, preserving lush foliage and flawless leaves without harshness. Its Bt formula is a refined, targeted approach—powerful on destructive caterpillars yet gentle on the beauty-makers like bees and ladybugs. Decant into a sleek hand sprayer and mist the undersides of leaves for a polished, well-tended look. This is the discreet essential for maintaining a vibrant, luxurious landscape.


Shield your plants the organic way—add Bonide Thuricide to your cart and keep caterpillars from stealing your garden’s show.

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