Fungus Gnat Control

Swatting adult fungus gnats never works — the damage is done by larvae in the media. Fungus gnat biological control kills them at the source, so the next generation never takes off.

Fungus gnat larvae chew roots and root hairs of seedlings and clones and spread root-rot pathogens, all while hidden in wet media. Fungus gnat biological control pairs nematodes for fungus gnats with soil predators to break the cycle, residue-free.

Why choose biological fungus gnat control

Adult sprays barely dent populations because the damaging larvae live in the media. Soil biologicals attack those larvae directly, leave no residue, avoid resistance, and protect the most vulnerable plants — seedlings, plugs, and clones.

How to build your program

Drench Steinernema feltiae nematodes to infect larvae, and establish Stratiolaelaps mites and Dalotia rove beetles on the surface for continuous control. Let the top of the media dry between waterings and track adults with yellow sticky cards.

What's in this collection

• NEMAforce SF (Steinernema feltiae) — nematode that kills fungus gnat larvae in the media.
• STRATIOforce — predatory soil mite.
• DALOTIAforce — rove beetle for surface patrol.

Frequently asked questions

Do nematodes kill fungus gnats?

Yes — Steinernema feltiae nematodes infect and kill fungus gnat larvae in the growing media, cutting off the next generation.

How do I get rid of fungus gnats fast?

Combine surface drying and sticky-card monitoring with nematode drenches and soil predators for quick, lasting control.

What causes fungus gnats?

Overly wet media, algae, and rich organic matter — the perfect nursery for fungus gnat larvae.

Will fungus gnats go away on their own?

Rarely in moist indoor conditions — without drying and biologicals they keep breeding in the media.