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Gnatrol Biological Larvicide. Fungus gnat larvae don’t stand a chance.

Gnatrol is a highly selective, biological larvicide for use in greenhouses to control fungus gnat larvae. It may be used on a wide variety of ornamentals, as well as all bulb crops, bedding plants and vegetable sets. Once the larvae have ingested Gnatrol, they become paralyzed, stop feeding immediately and die—usually within 24 hours. Gnatrol is now available in a water dispersible granule (WDG) formulation that will not leave a residue and is easier to measure for increased application accuracy.

NEW! Gnatrol WDG Biological Insecticide provides fungus gnat control equal to the previous liquid formulation but in an easier to use granule formulation that is OMRI listed.


Gnatrol offers growers these benefits:

  • OMRI-listed – for use by growers servicing the organic market.
  • Ease of use – easier to measure and mix WDG formulation.
  • Extended shelf life – dry formulation means more stable shelf life.

Gnatrol WDG is listed by the Organic Materials Review Institute (OMRI) for use in organic production. 

Active Ingredient:

Bacillus thuringiensis, subsp. israelensis, strain AM 6552 fermentation solids and solubles . . . . . . . . . 37.4% 

Other Ingredients . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62.6%

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100.0%

Gnatrol WDG 16 lb. pail

Gnatrol WDG 16 lb. pail

On Sale: Sold out:
Regular price $663.44
Regular price $736.00 Sale price $663.44
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  • Premium Quality

    The Mark of Trusted Quality.

  • Highest Purity

    Never Compromise on the Quality of Inputs.

  • Crop Specific

    Customized Fertilizer for your Favorite Crops.