Bonide® Thuricide® BT

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Protection for a wide range of trees and plants. Recommended for fruit trees, nut trees, berry plants, grapes, citrus, vegetables, and more. Controls caterpillars, worms, moths, leafrollers, and other common pests on contact. Application varies by plant and pest, so follow the label for specific instructions. Natural control. Contains naturally occurring soil bacterium: bacillus thuringiensis (Btk).

  • Mix ratio varies. Estimated range: from ½ teaspoon – 4 teaspoons per gallon of water

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Questions & Answers

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Browse 7 questions Browse 7 questions and 15 answers
Why did you choose this?
Stark Bro's Store
To have on hand.
Erica E on Apr 18, 2020
To have on hand.
Erica E on Apr 18, 2020
Works on tent catapillars
Edward B on Feb 29, 2016
Works on tent catapillars
Edward B on Feb 29, 2016
How is this applied?
Dr. Barton on Jul 12, 2018
BEST ANSWER: When you see moths flying around and/or worms eating your plants, mix the
amount of water and Bt recommended and spray on your plants. The worms eat the Bt and they die. If you have healthy squash plants that die overnight, this indicates worms are in the core of the plant. Buy two large veterinarian needles, use one to punch a hole in the main stem of the squash, use the other one filled with Bt & water to squart in the hole. This will save the rest of squash plants and it does not harm the plants.
When & How often do I use Thuricide on my peach trees?
Diane D on Sep 2, 2016
BEST ANSWER: I use it before my trees flower and after all the fruit has ripened and has been
picked I have some times have done a light spray after all the blossoms
have fallen off. Don't want to hurt my little Bee friends
does this affect bees?
Larry B on Feb 22, 2020
BEST ANSWER: Yes - you have to apply it at the plant stage when there are no blossoms to attract the bees. It breaks down in two weeks, so it is safe to apply at the right stage. More information is available via Google.
Bonide?? Thuricide?? BTWill it affect my bees?
Larry B on Feb 22, 2020
BEST ANSWER: Hi Larry, this product is a bacterium toxic to caterpillar larvae (moths & butterflies). No mention of harm to bees. However, on other Bonide products (ie. Fruit Tree Spray) caution is given to protect bees during blooming. Best to spray before blooms appear attracting the bees. Also, caution is given to user to wear an N95 dust/spray mask. Do not inhale, and wash clothes and body afterward.
Is this product harmful to dogs and lizards?
Marge J. on Aug 29, 2017
BEST ANSWER: No. This is an organic product.
Will this work on all my sweet corn also 4the ear borer worms than will destroy sweet corn? I've got lots of fruit trees n berry bushes as well so hoped this product will help 4all my fruit n veggies! Please answer
Joseph S on Jun 2, 2020

Customer Reviews

5.0 / 5.0
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1 Star
Save your fruit from bugs!!!
I will definitely recommend this product! My beautiful peach tree, the Reliance that I had ordered three years ago, produced a load of peaches, but I had bugs in them! I called Stark Brothers, and they told me to use! it gets rid of those gypsy moths and worm ASAP! I used it on my later peach tree, the Sun Haven, and those peaches were almost worm free. This works on all types of fruit trees too!!
August 27, 2017
over 3 years ago