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Gnatrol WDG is an OMRI-listed BTI larvicide that kills fungus gnat larvae directly in the soil — where the infestation starts.
 
Ideal for:
• Houseplants
• Hydroponics
• Coco coir
• Organic growing
 
Just mix with water and apply to soil as usual.
Larvae typically stop feeding within 24–48 hours after treatment.
 
FAQ
How long does Gnatrol take to work?
Fungus gnat larvae usually stop feeding within 24–48 hours after treatment.
 
Does Gnatrol kill adult fungus gnats?
No. Gnatrol targets larvae in the soil, helping break the infestation cycle at the source.
 
Is BTI safe for houseplants?
Yes. BTI is widely used for indoor plants, hydroponics, coco coir, and organic growing.
 
Does Gnatrol require soaking or straining?
No. Gnatrol WDG dissolves directly in water — just mix and apply to soil.

Gnatrol WDG BTI – Organic Fungus Gnat Larvicide

$17.95Price
Quantity

  • ✔ Expiration Date: 01/31/2028
    (When stored properly in a cool, dark environment at room temperature, the manufacturer states there is no strict expiration date. However, best effectiveness is recommended within 2 years.)

     

    ✔ OMRI Listed for Organic Production
    ✔ Kills fungus gnat larvae in 24–48 hours
    ✔ Safe for houseplants, hydroponics, coco coir, and soil grows

     

    What Is Gnatrol BTI?

    Gnatrol WDG is a biological BTI larvicide that targets fungus gnat larvae directly in the soil. It is widely used by greenhouse growers, hydroponic growers, and indoor gardeners to control fungus gnats at the source.

     

    Once fungus gnat larvae ingest Gnatrol, they stop feeding almost immediately and typically die within 24–48 hours.

     

    The water-dispersible granule (WDG) formulation mixes easily with water, leaves minimal residue, and allows accurate measuring for consistent application.

     

    Recommended Uses

    Suitable for:

    • Houseplants
    • Hydroponic systems
    • Coco coir
    • Soil grows
    • Organic gardening
    • Greenhouses
    • Ornamentals
    • Vegetable starts and bedding plants
    • Terrariums 
    • Composting toilets

    Apply as a soil drench or through hydroponic reservoirs.

     

    Active Ingredient

    • 37.4% Bacillus thuringiensis subsp. israelensis, strain AM 65-52 fermentation solids, spores, and insecticidal toxins.
    • 62.6% other ingredients
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