Caterpillar Kill Spray BT

$17.90 - $109.00

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4.5 out of 5 stars Rating: 4.6

27 Reviews | 17 Q&A

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NOTE: Thuricide Concentrate has been discontinued and has been replaced with Caterpillar Kill Spray BT. Same product, just a new name. 

{ $17.90 { $16.00 $109.00
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Caterpillar Kill Spray BT pint (16 oz)

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Thuricide Concentrate - CASEThuricide Concentrate - CASE case (12 pints)

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$109.00
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Caterpillar Kill Spray BT

NOTE: Thuricide Concentrate has been discontinued and Caterpillar Kill Spray BT is the new name. Same product, just a new name. 

Caterpillar Kill Spray BT previously known as Thuricide Concentrate is a biological insecticide with Bacillus thuringiensis (Bt) for use on fruits, vegetables, shade trees, and ornamentals plants to treat a variety of leaf-feeding worms. Pests treated include bagworms, tent caterpillars, gypsy moths, cabbage loopers, and tomato hornworms. Hi-Yield Thuricide may be applied up to and including the day of harvest.




Thuricide Concentrate is a biological insecticide for use on fruits, vegetables, shade trees, and ornamentals plants to treat a variety of leaf-feeding worms. Pests treated include bagworms, tent caterpillars, gypsy moths, cabbage loopers, and tomato hornworms. Hi-Yield Thuricide may be applied up to and including the day of harvest.

What is Thuricide?

Bacillus thuringiensis (Bt) (in the pest control form it is known as Thuricide) is a naturally occurring bacterium found in soils throughout the world. It is unique in that it offers unusual properties that make it useful for pest control, especially the control of leaf-feeding insects.  This is because Thuricide reacts with the cells of the stomach lining of target pests, causing them to not be able to feed within hours after contact.  The insects eventually die from starvation. The most common strain of Bt is the kurstaki strain which will kill leaf- and needle-feeding insects such as caterpillars and webworms.

Thuricide is generally considered beneficial in that it is naturally occurring and will not kill other non-target insects.  For example, if Thuricide is applied to a vegetable garden, it will not kill honeybees or other pollinating insects. Also, Thuricide breaks down in sunlight within 1-2 weeks.

The Kurstaki Strain (Thuricide) will kill vegetable, fruit, tree and crop leaf-feeding insects such as the cabbage worm (cabbage looper, imported cabbageworm, diamondback moth, etc.), tomato and tobacco hornworm, European corn borer, Alfalfa caterpillar, alfalfa webworm, Leafroller, Achemon Sphinx, Tent Caterpillar, Fall Webworm, Leafroller, Red-humped caterpillar, Spiny elm caterpillar, western spruce budworm, pine budworm, and pine butterfly.

Rating Snapshot

5 stars   21
4 stars   3
3 stars   1
2 stars   1
1 star   1

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Average Customer Rating
4.5 out of 5 stars (27)

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Most Helpful Customer Reviews
  • 18 of 18 people found this review helpful:

    5 of 5 stars  Works so far!
    By Andy in Bladenboro, NC on 04/17/2011
    Verified Purchase

    Terrible problem with tent caterpillars in our apple & pecan trees. Applied Thuricide when tents started to appear and they were gone in a week. No signs of any tents after a month of treatment

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  • 17 of 17 people found this review helpful:

    5 of 5 stars  thuricide concentrate
    By Roger in suttons bay, mich. on 08/11/2011
    Verified Purchase

    I decided to try thuricide, instead of killing tomatoe worms with sevin or other insecticide. I am always concerned about killing off the pollinators, along with the worms. I sprayed at 1 tblsp per gallon, and after 2 days the worms dropped off, so far it seems to work very well. The only question I have about the product that I can't find in any product written material, is; shoul I use the product before an infestation, to prevent it from happening in the 1st place?

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  • 12 of 12 people found this review helpful:

    5 of 5 stars  Thuricide Concentrate can save waterlilies.
    By Mike in Spring Hill, FL on 07/08/2011
    Verified Purchase

    I have used this recently as well as in the past, with 100% effectiveness. I am using it against the China Mark Moth larvae, and other larval insect pest, on my waterlilies. I do mix it strongly, as it is being used in a aquatic environment. 4 capfulls in a 16oz sprayer of water. I spray the pads in late evening, as strong sun will inhibit it's effectiveness. Most of the time, a single application will do the job. Worst case, 3 treatments, 3 evenings in a row. Side benefit, no a single, living mosquito larvae to be found in any of my pond, following the treatments.

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  • 11 of 11 people found this review helpful:

    5 of 5 stars  Thuricide
    By Pat in Bonners Ferry, ID on 10/14/2011
    Verified Purchase

    Works great on the moths for the Cole Crops. Wish it would work for aphids.

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  • 10 of 10 people found this review helpful:

    5 of 5 stars  Works Effectively - Very impressed!
    By A in Chandler, AZ on 11/11/2012
    Verified Purchase

    After just one use on my vegetable garden there was a significant improvement in health of the leaves. The thuricide did its job in reducing the number of tomato horn worms feeding on my plants. It also worked very well on my bouganville plants that have been unhealthy for years. In just two weeks new plant growth is emerging. Great product and very effective! I highly recommend it. The only drawback is the strong order - use in well ventilated areas.

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Most Recent Customer Reviews
  • 5 of 5 stars  Fast and Effective
    By Urban in houston, tx on 07/20/2016

    I purchased this product to treat catepillars on my grape vines. The price was great, the delivery was very fast, and the product knocked out the catepillars quickly. No sign of them since I started treating.

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  • 5 of 5 stars  caterpillars gone
    By James in pacifica, ca on 07/15/2016

    Used this product as directed, and now my lemon tree is off the caterpillar menu

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Wonderful product.
    By Georgina in North Miami, Florida on 05/21/2016

    This chemical saved my bouganville plants from a plague in 7 days. It works great. I had used other products before and nothing worked. Thank you.

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  • 5 of 5 stars  Thuricide Concentrate
    By Pat in SLC, UT on 04/08/2016

    This is the only product I have found that works on caterpillars I get on petunias. It is terrific and does not harm my plants or blooms, just kills the caterpillars

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Great Product
    By Dick in St Marys, GA on 11/09/2015

    My long time standby for eradicating the fuzzy caterpillar that attacked my oleander annually is no longer available. I found Thuricide Concentrate on the DOMYOWNPESTCONTROL website & decided to try it. It worked on the first application! I highly recommend this site. It contains good information & very timely shipping.

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  • 2 of 2 people found this review helpful:

    5 of 5 stars  Very happy shopping experience
    By Rafael in Greenacres, Florida on 06/12/2015
    Verified Purchase

    Quick delivery; product worked great first application. Good company to do business with. Will use again.

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  • 5 of 5 people found this review helpful:

    5 of 5 stars  B T concentrate (Thuricide)
    By Robert in Napoleon, North Dakota on 02/27/2015
    Verified Purchase

    I have use this material before and have been successful in controlling Leps in cole crops. This shipping from this company was very quick and material well packed and at a very reasonable price. I ordered off their web site and had my order in just a few days, faster than expected and I didn't have to drive75 mile to town, each way, and burn all my fuel hunting for Thuricide which none of my regular suppliers have in the store at this time of year. What more could I ask. Thanks.

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  • 4 of 4 people found this review helpful:

    5 of 5 stars  good product
    By Susan in wellington florida on 01/31/2015
    Verified Purchase

    price was fair and great that there is no shipping fee! Large size concentrate should last me for a few years. will definitely buy from domyownpestcontrol.com

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  • 5 of 5 people found this review helpful:

    5 of 5 stars  Battle Basil worms
    By Mw in landers california on 10/03/2014
    Verified Purchase

    works great applied it to my basil that was being decimated by worms and within a day the plant was recovering and now looks healthy with full leaves again. I finally have something to fight against these worms with that I feel I can eat the basil with no fear. Love it...

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  • 4 of 4 people found this review helpful:

    5 of 5 stars  Works
    By Happy in Gulf Coast, MS on 07/28/2014

    Some bug was eating most of my tomatoes. I used Thuricide on my plants and the bugs left my tomatoes alone.

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Most Helpful Q&A's

10/04/2013 Ray from Jackson, Michigan

QWhat is the shelf life of Thuricide concentrate? Is it still good a year or two after date of purchase?

AThe shelf life of Thuricide Concentrate is 3-5 years from date of purchase if kept in a cool/room temp dry place.

21 of 21 people found this answer helpful.
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06/18/2011 Kris

QCan Thuricide Concentrate be sprayed on the ground? Is it harmful to animals such as dogs?

AThuricide Concentrate is a very safe to use when the product label is followed. Be sure all pets and people are out of the area when Thuricide is being applied and they do not return until the area is dry. Thuricide Concentrate is labeled to be applied to fruits, vegetables, ornamentals and shade trees.

16 of 16 people found this answer helpful.
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10/05/2011 Bert from Hickory, Nc

QAfter Thuricide is applied how long till the vegetable is safe to eat?

AAccording to the the Thuricide product label you may apply Thuricide up to and on the day of harvest.

14 of 14 people found this answer helpful.
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07/06/2013 Russell from Vero Beach Florida

QDoes Thuricide kill catepillars on Snowbush plants?

AThuricide will kill catepillars on any plant you spray it on and is safe to be used on ornamentals, fruits and vegetables without harming them. Please let us know if you have any other questions.

7 of 7 people found this answer helpful.
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06/05/2013 Kenneth from Moncks Corner Sc

QDoes heavy rain wash Thuricide off the plants and require respray?

AHeavy rain should not wash off Thuricide. However, the label indicates you can incertain times apply at first sign of infestation and repeat at weekly intervals when needed. Please refer to the product label to verify if your use requires respray.

7 of 7 people found this answer helpful.
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Most Recent Customer Questions

06/13/2016 Jana from Amherst, Ma

QHow long does the diluted mixture of Thuricide Concentrate last in the bottle?

A

Once the†Thuricide Concentrate has been mixed, it must be used or discarded within 24 hours.

1 of 1 people found this answer helpful.
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04/23/2016 Denny from Albuquerque, Nm

QHow often should one spray Thuricide Concentrate on tomato plants?

A

Thuricide Concentrate should be applied when pest activity is first observed, and then every 5-7 days thereafter as needed.†

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03/27/2016 Russ from Hampton, Va

QHow long can the unused solution of Thuricide Concentrate be stored?
I mix a gallon of water with 2 oz. of Thuricide Concentrate.

A

It is recommended that you use a mixed gallon of Thuricide Concentrate within 24 hours. It will lose its efficacy if used after that time period.†

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08/01/2014 Dan from Sandy Valley Nevada

QWhere can I find the San Diego strain?

AWe are not exactly sure what you are looking for or what it is that you will be treating. Please contact us with more information for free expert advice at 866-581-7378 M-F 9-5PM EST.

1 of 1 people found this answer helpful.
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11/25/2013 David from Livonia, Michigan

QIs it possible to control gypsy mothinfestations with application only to tree trunks?
Mature an dvery tall trees prevent reaching leaves with spray.

A

Per the product label, mix 2 fl. ozs. of Thuricide per 3 gallons of water (4 tsp. per gallon) for a handsprayer or proportional amounts for a hose-end sprayer following Manufacturer’s
Directions. Apply at first sign of infestation and repeat at weekly intervals when
needed to maintain control. Apply to thoroughly cover all foliage surfaces of Shade Trees and Ornamentals for control.

1 of 2 people found this answer helpful.
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10/31/2013 Tom from Norwalk

QDoes Thuricide Concentrate - 16 oz. work on gnats and fruit flies?

AThuricide Concentrate - 16 oz. is not labeled for gnats. Where are you treating for fruit flies and gnats?

2 of 2 people found this answer helpful.
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07/21/2013 Ilyas from Austin,tx

QDoes the thuricide concentrate stay on the vegetable and fruits and if it does is it harmful if you eat it

AAccording to the the Thuricide product label you may apply Thuricide up to and on the day of harvest. It is not harmful to eat, you want to make sure to thoroughly wash the veggies and fruits.

5 of 5 people found this answer helpful.
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06/05/2013 Kenneth from Moncks Corner Sc

QHow long can Thuricide concentrate be stored

AThuricide Concentrate can be stored for 3-5 years if tightley closed and kept out of the heat.

4 of 4 people found this answer helpful.
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05/30/2013 D. from Mocksville, Nc

QCan Thuricide be used inside of Beehives ?
Sprayed the wax inside of beehives to contol Wax Moths

AAccording to the manufacturer this product will not harm honey bees.

6 of 6 people found this answer helpful.
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12/22/2011 Debra from Lagrange, Ga

QCan thuricide concentrate be used as a drench to kill fungus gnat larve in house plants?

AThuricide concentrate is actually not labeled for fungus gnat larvae and so we are not sure of how effective it would be.  However, we do sell a product called Talstar One which is what we have always recommended for fungus gnats and works great.  You should also place your plants outside to dry out a little bit or cut down on how often you water them, if possible, and this will also decrease the fungus gnat reproduction cycle.

5 of 9 people found this answer helpful.
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