Effectively controls fungus gnat larvae
Easy to use
Gnatrol is OMRI-listed for organic production

Expiration date: 1\31\2028

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.

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

2 pounds (32 ounces) of concentrate will treat up to 985 gallons

(at the light infestation rate of 1/4 teaspoon per gallon).

For use as a soil drench or in a hydroponic system.

Bacillus thuringiensis, subsp. israelensis, strain AM 65-52

fermentation solids, spores and insecticidal toxins . . . . . 37.4%

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

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

2 pounds Organic Gnatrol BTI

129,95$

Number of 4"x8" Yellow Sticky Cards in the order:

Cantidad

This listing is for 2 pounds of Gnatrol with instructions. This will make between 123 gallons at the heavy infestation rate of 3 tsps per gallon and 1000 gallons at the low rate used for maintenance control of 1/4 tsp per gallon.
*To be 100% effective 3 applications need to be made over 15 days.

Apply once every 5 days to break the life cycle.

Application:

1/4 - 1/2 teaspoon makes one gallon for preventative use.

1 teaspoon per gallon for an active light infestation.
2 teaspoons per gallon for a medium infestation.
3 teaspoons per gallon for a heavy infestation.

Apply it to the top 2 inches of soil as a drench every 5 days until the adults are not flying around anymore. Usually 15-20 days or less to fully eradicate them.

Hydroponic application is the same mixture per gallon as soil but with a large reservoir it's easier to use weight per gallon over teaspoons:

preventative use: 23- 46 grams per 25 gallons

Light infestation: 1-1.5 ounces per 25 gallons

Medium infestation: 2-3 ounces per 25 gallons

Heavy infestation: 3.25 - 6.5 ounces per 25 gallons

*As in soil you need to add Gnatrol to your hydroponic tank three times total, once every 5 days to break their life cycle.

Stop Fungus Gnats FAST Kill Larvae in 24–48 Hours
Gnatrol BTI Larvacide

If you don't kill the larvae, the problem never goes away

👉 Works in soil, coco, and hydro

2 pounds Organic Gnatrol BTI

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Product Documents

Application Instructions:

How Gnatrol WDG Works

How long does Gnatrol WDG take to work?

Why do I need to make applications every 5-7 days?

Is it safe to use Gnatrol WDG indoors around people and pets?

Should I continue to use Gnatrol after Fungus Gnats are gone?

Will water with Gnatrol mixed in it be good for a long time?

Fungus Gnat FAQ

Kill fungus gnat larvae in 24–48 hours without chemicals

fast shipping / safe / organic