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The invisible, all-natural way to get rid of pesky black flies in your home & it’s so easy to add to your house plants

Published on May 02, 2025 at 08:24 AM

THEY’RE probably driving you mad, now that the weather has warmed up.

And while house flies are the in the summer, there’s another insect that’s also causing problems.

Fungus gnats trapped on a yellow sticky trap in a houseplant.
There are few things more annoying than the pesky little flies that get on your house plants
Packaging for sciarid fly nematodes, child, pet, and wildlife friendly.
Nematodes are invisible to the naked eye, but work a treat in getting rid of the pests

Namely the tiny black flies that you find buzzing around or on your house plants – the amount of which increases dramatically when the sun’s out.

Entomologist Darragh Ennis took to TikTok to share his advice for getting rid of the pesky bugs – called fungus gnats – as he admitted they even annoy him.

They’re also “really hard to get rid of”;, even with chemicals, particularly when they take hold of your

But an invisible method of keeping them at bay works a treat, Darragh explained, and they’re called nematodes.

While you’ve “probably never heard of them”;, they’re “little microscopic worms that live in the soil”; and are “probably the most common animal on the planet”;, but are invisible to the naked eye.

They get rid of the flies by crawling inside of them and killing them from the inside out.

It might be “gruesome”; but it’s an entirely natural way of killing the bugs.

You can even order the nematodes on the Internet, and they come in a small packet.

Once they’re arrived, put them in a watering can, add water and pour onto your house plants.

“The best bit about this is that it crawls through the soil and hunts through the larvae and everything so they’re gone,”; Darragh concluded.

And people were quick to praise Darragh for sharing the top tip, with one writing: “HERO!”;

“They’re driving me crazy. Thanks Darragh!”; another added.

“Agree. Me and my son in law are nematode fans for the sake of our houseplants,”; a third commented.

“Fun fact: nematodes are so incredibly common that it is believed that they account for about 80% of all the individual animals on planet earth,”; someone else said.

“As a pest controller they are a nightmare to deal with,”; another wrote.

“Modern offices have so many planters and the gnats turn up in the soil.

“We always recommend nematodes and a fumigation to knock down the numbers.”;

“I got nematodes online for my monstera who has grown to 5ft!”; someone else said.

“I was not letting her die! They worked a dream!! I highly recommend them.”;

“We have nematodes in our water treatment process,”; another commented, calling them “gorgeous wee b**gers”;.

And they’re a great option if you’ve got pets too.

“I have cats so won’t use chemicals,”; another person commented.

“I’ve been using nematodes for years and they 100% work first time every time for fungus gnats.”;

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