Gardening Naturally Fungus Gnat (Sciarid Fly) nematodes are a natural organic pest control for reducing fungus gnat populations. The nematodes (Steinernema feltiae) are microscopic transparent worms that live in the soil and feed and multiply inside the fungus gnat larvae they come into contact with. Unlike synthetic pest control options, these highly specific natural predators will hunt day and night to protect your vegetables from unwanted intruders while leaving other beneficial insects alone.

How does it work?

After being applied to moist soil, the pearls will break down, and the nematodes inside will seek out any pest larvae below the ground. As the larvae move around and towards your plants, they will pick up nematodes, which will enter through openings in the larvae. Once inside, the nematodes will feed and reproduce inside the larvae. This usually takes place beneath the surface, so no trace is left in your vegetable beds. The nematodes will continue to feed and breed, expanding their population, range and effectiveness until food becomes scarce.

How do I use them?

Gardening Naturally fungus gnat nematodes are supplied as biodegradable pearls, which contain nematodes. We advise applying them to potted plants in March or May and then again between August and September when the fungus gnat larvae are present. Simply place one pearl every 3cm within the pot and then water the plant. Keep the soil moist where possible for the next 2 weeks to ensure the nematodes remain healthy.

Is it safe?

Nematodes are completely natural and prevalent in most gardens throughout the UK. Gardening Naturally predatory nematodes are simply a more precise and effective version, which will only target the local fungus gnat population. They are designed for use where pets and other wildlife are present.

When is the best time to use nematodes?

The best time to use these nematodes would be when the soil temperature is reliably above 5°C. They are most useful between March and May and again between August and October when the larvae are present. They should only be applied when the soil temperature is above 5°C. Of course, if you wanted to use them in a covered environment where the temperature will not drop below 5°C, you could use them year-round.

Application Advice:

1. Place a single pearl in a small hole every 3cm within the pot.
2. Water the plant until the pearl has dissolved.
3. Keep the soil moist within the pot for the next 2 weeks
4. Repeat treatment if necessary