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Gnatrol Organic WDG BTI Pesticide 1/4lb.

Regular price $23.99

  • 1/4lb. Weight
  • Gnatrol is a highly selective, biological larvicide for control of fungus gnat larvae
  • Soluble powder form
  • Omri Listed
  • Can be used indoors, and in greenhouses
  • Will not effect State Mandated testing of finished product
  • Bacillus thuringiensis subspecies israelensis strain AM 65-52 solids, spores and insecticidal toxins 37.4%

We typically ship orders out within 1-3 business days. We ship most packages via Fedex, UPS, and USPS and tracking will be emailed once your order has been shipped. We ship orders weekdays, Monday through Friday from our Oklahoma City, Oklahoma warehouse. You can contact us with any shipping related questions Contact US

You can return items within 30 days of invoice date to get a full refund, assuming the item is in 'as new' condition, and unopened  To read our full refund and returns policies go to our Refunds & Returns page.

 We do not accept returns of any opened products.



Ask a Question
  • I will use the GNATROL but what can I mix it with to rid myself of the adults. Yes, I have the yellow sticky strips but can I mix two items together to rid myself of the adults and the larvae. thank you

    You can use the yellow sticky traps to trap adults, while using the gnatrol to kill the larvae.

  • how do you mix it?

    1 tablespon per gallon of water soil drenched once per week.

  • Is there an international / Canada shipping option I'm missing? On Checkout the only option that seems to be available is US?

    If you shoot us an email we can get you setup with an order to Canada.

  • do you deliver to Canada??

    We do ship some products to Canada. This happens to be one of them.

  • How do I use GNATROL ORGANIC WDG BTI PESTICIDE? I am an urban gardener who overwinters rosemary bushes inside and a fungus gnat infestation. I am starting vegetables from seed under lights and need to do something about the fungus gnats.

    1 tablespoon per gallon of water soil drenched once per week should do the trick.

  • Can it be ran through a drip feed system? Or hand water only?

    You can run this through a drip feed system with little issue.

  • What is the shelf life of this product once opened ? Should it be stored in the fridge?

    It will stay good for many months once opened.

  • What are the directions for use?

    We suggest using 1 tabepsoon per gallon of water soil drenched once per week.

  • Is this considered organic?

    Yes this product would be considered "organic", and it is OMRI listed. This product is a natural bacteria on an inert carrier. It can be used in all life stages of plant growth, and will not damge your crops. It will also pass all local State testing for recreational and medical cannabis grows.

Customer Reviews
4.8 Based on 5 Reviews
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Randy M.
United States United States


Worked well on the first treatment. I did apply a second one. Think I will change my fly traps (which are a mass of pre-Gnatrol bugs) to monitor any resurgence.

United States United States

Gnatrol Organic WDG BTI Pesticide 1/4lb

Those little fungus gnats are quite annoying. The Gnatrol is currently working almost 100%. I am pleased

United States United States

Great product and received quick red bud **** it quick so far been happy with anything I got and have good info on there site

United States United States

Gnatrol seems to do the trick!

I bought Gnatrol to solve a problem with fungus gnats that had infested my orchid collection. I received my order quickly. After two uses, one week apart, it seems to have largely taken care of the issue. I will continue at weekly intervals for a while to make sure! (I also bought some small carnivorous plants to **** the adult gnats.) I would have like to have directions for its use on the packaging, but at least I was able to look to the website for mixing instructions. I reduced my rating one star because of that.

Keith V.
United States United States

Great product

Great thanks worked for me.Highly recommend if you have gnats

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