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

Name: Gnatrol WDG BTI – Organic Fungus Gnat Larvicide
Brand: Gnatrol WDG

$17.95

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✔ Expiration Date: 01/31/2028

When stored properly in a cool, dark, dry environment, this product remains stable well beyond the listed expiration date. However, for Peak potency and effectiveness, use within 2 years is recommended.

✔ 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
Coverage depends on application strength:

• Heavy infestation rate (3 tsp per gallon):
4 ounces Gnatrol treats approximately 14 gallons of water

• Maintenance rate (1/4 tsp per gallon):
4 ounces Gnatrol treats approximately 168 gallons

Suitable for fungus gnat control in:
• Houseplants
• Hydroponics
• Coco coir
• Soil grows
• Organic gardening

• Terrariums
• Composting toilets

To fully break the fungus gnat life cycle:
• Apply 3 total treatments
• Reapply every 5 days
• Continue until adult gnats are no longer present

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Gnatrol WDG BTI – Organic Fungus Gnat Larvicide

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