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Steinernema feltiae (Easy-Release Powder)
Soil-Applied Biological Pest Control for Fungus Gnats, Thrips, and Root Pests
Sticky traps catch adults—but they don’t touch the source.
Neem and sprays stay on the surface.
The real problem is underground.
Steinernema feltiae is a biological soil treatment designed to eliminate fungus gnat larvae, thrips pupae, root aphids, and other soil-dwelling pests before they can emerge. These microscopic beneficial nematodes actively move through moist soil, locate pest larvae, and eliminate them from the inside—breaking the life cycle at its source.
This is soil-first pest control for problems sprays can’t reach.
What Are Steinernema feltiae Nematodes?
Steinernema feltiae are beneficial predatory nematodes used in integrated pest management (IPM) programs for indoor plants, greenhouses, nurseries, and soil-based growing systems.
Once applied, they:
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Seek out soil-dwelling pest larvae
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Enter the host and release symbiotic bacteria
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Kill the pest within days
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Reproduce underground for continued control
They work invisibly, without residue, odor, or re-entry restrictions.
What This Treats (Soil Stages)
| Pest | Life Stage Targeted |
|---|---|
| Fungus gnats | Larvae in soil |
| Thrips | Pupae in substrate |
| Root aphids | Soil-dwelling forms |
| Fungus beetles, weevils, flea beetles | Larvae and grubs |
| More | Dozens of soil-based pests |
If fungus gnats keep returning, this is how you stop the cycle permanently.
Why Choose Easy-Release Powder?
| Feature | Benefit |
|---|---|
| Fast-acting | Kills larvae within 2–5 days |
| Self-replicating | Continues working underground |
| Cool-weather tolerant | Effective down to 46°F soil temps |
| Easy mixing | Dissolves quickly for even application |
| Broad compatibility | Safe with beneficial insects and mites |
This product pairs especially well with predatory mites and predatory insects for complete, full-lifecycle pest suppression.
When to Use This Treatment
Use Steinernema feltiae if:
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Fungus gnats persist despite traps
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Thrips return after foliar treatments
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You suspect root-level pest pressure
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You want chemical-free pest control
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You are building a biological control system
This is ideal for houseplants, rare plants, cabinets, greenhouses, grow rooms, and soil-based containers.
How to Apply
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Pre-water soil so it is evenly moist
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Mix powder into non-chlorinated water (59–69°F)
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Apply using watering can, sprayer, or irrigation
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Lightly water again to move nematodes into root zones
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Keep soil lightly damp for 10–14 days
Avoid dry soil, full sun, or extreme temperatures during application.
How Much to Use
| Use Case | Application Rate |
|---|---|
| Preventative or light pressure | 5 million / 300 sq ft |
| Moderate to heavy infestation | 5 million / 50 sq ft |
| Reapplication | Every 2–4 weeks as needed |
Repeat weekly during heavy fungus gnat pressure or ideal breeding conditions (warm, humid, organic-rich soil).
Best Application Conditions
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Soil temperature: 46–86°F
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Moisture: Damp, not saturated
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Light: Early morning, evening, or cloudy days
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pH: Neutral to slightly acidic
Pro Tips for Maximum Control
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Do not overwater—movement requires oxygen
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Avoid insecticides before or after application
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Reapply to disrupt overlapping pest generations
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Combine with predatory mites (Swirskii, Persimilis) or predatory insects (Orius) for above- and below-ground coverage
This is how professional IPM programs are built.
Safe for Everything That Isn’t a Pest
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Non-toxic
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No residue
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No re-entry interval
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Safe for plants, people, pets, pollinators, and beneficial insects
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Compatible with organic and regenerative growing systems
Shipping & Storage
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Ships with live delivery guarantee
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Refrigerate at 35–50°F (do not freeze)
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Use within 30 days
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Once mixed with water, apply within 6 hours