Sf Nematodes - Fungus Gnat Exterminators

Still Seeing Fungus Gnats No Matter What You Try?

Sticky traps aren’t solving it. Neem isn’t getting into the soil.
That’s because the problem isn’t flying around—it’s living underground.

Steinernema feltiae is your treatment for fungus gnat larvae, thrips pupae, and other soil-dwelling pests. These microscopic beneficial nematodes hunt through the topsoil, enter pest larvae, and release symbiotic bacteria that kill from the inside. It’s biological warfare—minus the spray bottle.

Steinernema feltiae (Easy-Release Powder)

Natural Soil Treatment for Fungus Gnats, Thrips Pupae, and Root Aphids

Once inside a host, these nematodes reproduce and spread—creating a self-sustaining population that continues working long after application. All they need is a bit of moisture and a stable temperature range.

Each application gives you rapid suppression of pests and long-term prevention. No residue. No re-entry delay. No harm to the good guys.

What It Treats

If you’re seeing fungus gnats that keep coming back, this is how you stop the life cycle at the root.

Why Choose the Easy-Release Powder?

This is a soil-first solution for pests that sprays can’t touch.

When to Use It

• You’ve seen fungus gnats flying—but traps aren’t solving it

• You’re spotting thrips again after foliar treatment

• You’ve treated above-ground pests but still have root problems

• You want biological control with no residue

How to Apply

1. Pre-water the soil to keep it evenly moist

2. Mix powder into non-chlorinated water (59–69°F)

3. Apply using a watering can, sprayer, or irrigation

4. Water lightly again to help nematodes reach pest zones

5. Keep soil lightly damp for 2 weeks post-application

Avoid full sun, dry soil, or extreme temperatures during and after application.

How Much to Use

Repeat weekly if pressure is high or if conditions are ideal for gnat cycling (humid, organic-rich soil, indoor plants).

Best Conditions

• Soil temp: 46–86°F

• Moisture: Damp but not soaked (don’t flood)

• Light: Apply in early morning, evening, or on cloudy days (UV-sensitive)

• pH: Neutral to slightly acidic is ideal

Pro Tips

• Don’t overwater. Nematodes move best in moist—not saturated—soil

• Skip the sprays. Insecticides (even organic ones) can wipe them out

• Repeat as needed. They reproduce, but reapplication helps break life cycles

• Combine with above-ground predators (e.g., Orius, Swirskii, Persimilis) for full lifecycle suppression

Safe for Everything That Isn’t a Pest

• No toxicity

• No re-entry interval

• No residue

• Works in organic, regenerative, and soil-based systems

• Zero harm to pollinators, pets, beneficial insects, or soil microbes

Shipping & Storage

• Ships with live delivery guarantee

• Store at 35–50°F, refrigerated (not frozen)

• Use within 30 days

• Once mixed with water, use within 6 hours