Beneficial Nematodes

⚖️ Educational use only. Always read and follow the full product label — the label is the law under FIFRA. Full disclaimer → | ⚗️ Mixing Calculator →

🎯 Target Pests

White grubs (Japanese beetle, June bug, chafer larvae), flea larvae in soil, fungus gnat larvae, crane fly larvae (leatherjackets), sod webworm, cutworms, root weevil larvae, shore fly larvae, black vine weevil. Two main types: Steinernema (ambush predators, surface pests) and Heterorhabditis (cruising predators, deep soil pests like grubs).

🏷️ Common Products & Brand Names

NemAttack (BioLogic), Scanmask (BioLogic), Grub Busters, NemaSeek (Arbico Organics), Millenium (Becker Underwood), Guardian (Koppert). Available mail-order — they're LIVING organisms shipped in moist media. Must be refrigerated and used promptly.

⚠️ Safety & Precautions

Completely non-toxic to humans, pets, earthworms, birds, and plants. They ONLY parasitize pest insects. Cannot survive in warm-blooded animals. No PPE needed. No re-entry interval. Safe for organic gardening (OMRI listed).

✅ The ultimate "green" pest control: Beneficial nematodes are living organisms, not chemicals. They reproduce in pest bodies and continue working in the soil. Zero environmental concerns.

Example

0.5 oz

per gallon

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Enter your sprayer size and target rate — get the exact amount to pour. Backpack, hand sprayer, hose-end, or skid unit.

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💡 Pro Tips & Best Practices

Critical — timing and conditions: Apply in late afternoon or evening (UV kills them). Soil must be moist — water before AND after application. Soil temperature must be above 55°F for Steinernema, above 60°F for Heterorhabditis. Keep soil moist for 2 weeks after application.

Which species? For grubs: Heterorhabditis bacteriophora (Hb) — these are the "cruisers" that hunt deep. For fleas/fungus gnats: Steinernema feltiae (Sf) — ambush predators near the surface. For both: apply a mix.

Storage: Refrigerate immediately upon receipt (35-40°F). Use within 2 weeks. These are LIVING organisms — they die if stored at room temperature or in direct sunlight.

🐛 Pests This Treats — Learn More

Click any pest to view its full identification guide, biology, and treatment options.

🐛 Ants → 🐛 Cutworms → 🐛 Fleas → 🐛 Fungus Gnat → 🐛 Grubs → 🐛 Japanese Beetle → 🐛 Scales → 🐛 Sod Webworm → 🐛 Ticks →

🌿 Environmental & Ecological Impact

🐝 Bees / PollinatorsNONE

🐟 Fish / Aquatic LifeNONE

🐦 BirdsNONE

🐕 Mammals / PetsNONE

🦐 Aquatic InvertebratesNONE

💡 Microscopic organisms that target soil-dwelling grubs and larvae. Zero environmental risk. Fully organic.

❓ Frequently Asked Questions

Q: Is beneficial nematodes safe for pets?

Follow the product label. Keep pets out of treated areas until completely dried (2–4 hours for sprays). Once dry, treated surfaces pose minimal risk to dogs and cats.

Q: Can I use beneficial nematodes indoors?

Check the specific product label — formulations vary. Baits and dusts often have indoor labeling; concentrates and granulars are typically outdoor.

Q: How long does beneficial nematodes last after application?

Residual varies by formulation, surface type, weather, and UV exposure. Indoor applications last longer than outdoor. Check the product label for re-application intervals.

Q: What should I do if exposed?

Remove contaminated clothing, wash skin with soap and water. For eye contact, rinse 15–20 minutes. For ingestion or severe symptoms, call Poison Control (1-800-222-1222). Have the product label available.

📋 Safety Data Sheet (SDS)

📋

Beneficial Nematodes — Safety Data Sheet

View the official SDS document for this product directly on the CDMS label database.

📄 View SDS on CDMS → 🏛 Search EPA Label Database →

Beneficial Nematodes Safety Data Sheet page 1

📄 Beneficial Nematodes — Safety Data Sheet · View the complete SDS document above or download below

📄 CDMS Label & SDS Database 📄 EPA Label Search

💡 Did you know? A single beneficial nematode can produce 200,000+ offspring inside a single grub host. When the host dies, the nematodes emerge and immediately begin hunting new prey. It's like deploying a self-replicating army in your lawn.

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Reviewed by Derek GiordanoContent reviewed by a licensed pest management professional. Last reviewed: April 2026.