How do Nematodes Work
Guide to Beneficial Nematodes
Nematodes are tiny, worm-like organisms that live naturally in soil and water. They are often called roundworms. In healthy garden soil, there can be thousands or even millions of nematodes in a small area. While some nematodes can be harmful, many are helpful and support healthy soil and natural pest control.
What Are Beneficial Nematodes?
In gardening, the term usually means beneficial nematodes used for biological pest control. These microscopic nematodes hunt soil-dwelling pests and help reduce infestations without using chemicals.
Common garden pests controlled by nematodes
- Vine weevil larvae
- Slugs
- Codling Moth
- Sciarid Fly
- Chafer grubs
- Leatherjackets
- Fungus gnat larvae
- Cutworms
- Chafer Grub
How Do Nematodes Work?
Beneficial nematodes move through moist soil, find the target pest, and enter its body through natural openings. They then release natural bacteria that stop the pest from feeding. The pest dies within a few days, and the nematodes multiply and continue hunting other pests. This makes nematode treatment a strong option for natural pest control.
Why Use Nematodes for Garden Pest Control?
Using nematodes is a popular method in organic gardening and chemical-free pest control. Compared with many pesticides, beneficial nematodes are:
- Safe for pets and children when used as directed
- Harmless to bees and many pollinators
- Eco-friendly and residue-free
- Suitable for lawns, borders, pots, veg beds, and greenhouses
Types of Nematodes in Soil
There are thousands of nematode species. In simple terms, they fall into three groups:
- Beneficial nematodes (used for biological control of pests)
- Free-living nematodes (help break down organic matter and improve soil health)
How to Apply Nematodes
Nematodes are living organisms, so correct application matters. They are typically mixed with water and applied using a watering can or sprayer. For best results:
- Apply to moist soil
- Water before and after treatment
- Apply in the evening or on a cloudy day (avoid strong sun)
- Follow the recommended soil temperature range for the specific nematode type
Summary
Nematodes are microscopic roundworms that play a big role in soil ecosystems. For gardeners, beneficial nematodes offer effective, targeted, and eco-friendly pest control for vine weevil, chafer grubs, leatherjackets, and more. They’re a smart choice for natural gardening and long-term soil health.