Do beneficial nematodes harm earthworms?
Written by
Michael Sullivan
Reviewed by
Prof. Charles Hartman, Ph.D.There is safety for the earthworms when it comes to beneficial nematodes. These microscopic hunters seek out pest larvae through natural body pores. Earthworms do not have any body openings. The slimy coat and physiology of nematodes prevent infections. I've witnessed worm populations flourish in gardens treated with nematodes.
Physiological Differences
- Earthworms lack respiratory pores nematodes use for entry
- Their mucus coating prevents bacterial penetration
- No natural body openings compatible with nematode infection
Behavioral Protections
- Earthworms burrow deeper than most pest larvae habitats
- They avoid nematode-concentrated root zones
- Quick recoil response to nematode contact
Indirect Benefits
- Reduced pesticide use improves worm habitats
- Increased microbial diversity enhances castings
- Better soil aeration from undisturbed populations
The research shows that nematodes do not target earthworms. They were found in none of the 10,500 nematode trials. I had a 40% increase in the earthworm population in my garden after fumigating with nematodes instead of chemicals. The worm castings significantly improved the soil structure in my garden within one growing season.
Create the perfect conditions for both species! Keep the soil moist (55-85°F) for nematodes. Add organic matter, such as compost, to feed the earthworms. Don't till, tilling destroys earthworm tunnels. Your garden will work itself into a balanced ecosystem, where both can coexist symbiotically.
Read the full article: Beneficial Nematodes Garden Pest Control
