—
1. Know your enemy.
Identify the Target Pests: Different nematode species target different pests. Make sure you know which pests are causing trouble in your garden and choose the right nematode species to combat them.
Common Targets: Nematodes can help control grubs, fleas, caterpillars, and many more.
—
—
2. Maintain the cold chain.
Ask your supplier for cool-pack shipping to keep nematodes at the right temperature during transit.
Use insulated packaging for long trips and warm conditions.
Store them in the fridge—2°C to 10°C—upon arrival and don’t open the fridge too often. This keeps the nematodes in top shape until you’re ready to use them.
Never freeze nematodes. Extreme cold can kill them, rendering them useless.
3. Apply at the right time.
Apply nematodes during the cooler parts of the day, like early morning or late afternoon, to protect them from harsh sunlight and heat.
Ultraviolet (UV) rays in sunlight can harm or kill nematodes. UV radiation damages their cells and can lead to desiccation, reducing their viability and effectiveness.
Direct sunlight increases soil temperature, which can stress or kill nematodes. While some nematode species tolerate higher temperatures, extreme heat can be lethal.
Perfect Season: Spring and fall, when pests are in their most vulnerable larval stages, are ideal times to apply nematodes.
4. Keep the substrate moist.
Hydration is Key: Nematodes need a moist environment to move and infect pests. Water your garden before and after application to keep the soil damp.
Maintain Moisture: Keep the soil moist for at least a week after application for the best results.
5. Stir the liquid frequently.
Blend Well: Follow the package instructions to mix nematodes with water. Ensure they’re well-dispersed before applying.
Application Methods: Use a watering can, hose-end sprayer, or irrigation system to evenly distribute the nematode solution over your garden.
If the application is homemade—bucket, watering can, etc.—stirring can be done manually with the help of a simple stick.
Use equipment that can handle the nematode suspension without clogging. Ensure even distribution of nematodes to cover the target area effectively. When using a sprayer, remove any fine filters that might trap the nematodes and use a coarse nozzle setting—over 0.5 mm.
6. Use compatible agrochemicals.
Infective juveniles of beneficial nematodes can handle short-term exposure (2–24 hours) to many insecticides, fungicides, herbicides, fertilizers, and growth regulators. This means you can mix and apply them together.
Just keep in mind, chemical concentration varies with application volume and system. Some formulations might be more nematode-friendly than others.
Sequential Applications: Applying beneficial nematodes and agrochemicals at different times can reduce negative interactions. For example, apply nematodes 1 to 2 weeks after applying insecticides or nematicides that degrade quickly.
Some chemicals can alter soil conditions, indirectly affecting nematode survival and activity.
Eco-Friendly Options: Integrate nematodes with other natural pest control methods for a chemical-free garden.
7. Check expiry dates.
Always use nematodes before their expiration date for optimal performance.
... ... ... ... ... ... ...
References
Grewal, P.S., Ehlers, R.-U., Shapiro-Ilan D.I. 2005. Nematodes as Biocontrol Agents. New York, NY: CABI. 505 p.