A peroxide solution apparently kills larvae and eggs on contact, effectively killing off all infant gnats and disrupting the lifecycle. You should be able to buy hydrogen peroxide from any high street pharmacy or online.
All you will need is a spray bottle, dish soap, water and/or baking soda and vinegar. You just need to use a few drops of dish soap and a table spoon of vinegar for each cup of water. With this these destructive gnats will parish with just a few spritz of your new chemical weapon.
Use yellow houseplant sticky stakes
Yellow sticky traps are great for capturing adult fungus gnats and also help you gage which plants are the most infested. Put the sticky fly traps next to the soil of any indoor plants, they'll be attracted to the bright colors, fly into them and get stuck.
Fill a glass or a bowl with 1 tablespoon of sugar, 2 tablespoons of apple cider vinegar, a half cup of warm water, and about 5 drops of liquid dish soap and stir well. Gnats will be attracted to the sweet sugar and pungent vinegar, but the sticky dish soap will disable them from escaping.
The only way to get rid of gnats without killing them is to repel them with scents they don't like: vinegar, vanilla, pine oil, peppermint, lemon, eucalyptus, and lavender. Even dryer sheets could help. Of course, the first line of duty would be to get rid of the infestation's root cause.
Inside the home, gnats can be attracted to unsealed produce, fresh flowers, houseplants, food spillage and open or overflowing garbage cans. Gnats may also live in sink drains where food residue can collect. Dirty kitchen sink drains can provide food, water, shelter and breeding sites to many fly species.
The mixture should contain a few drops of dish soap, a tablespoon of vinegar, and baking soda per cup of water. A few sprays of this mixture is an effective gnat repellent. They may be sprayed in areas where gnats are commonly seen, such as around plants, in the bathrooms, etc.
With all that in mind, the EPA says that hydrogen peroxide in low doses is indeed safe for plants. The caveat is of course, in the concentration. Too much can damage plants.
For hydrogen peroxide, mix one part 3% hydrogen peroxide with four parts water. Carefully pour this solution onto the top of the soil, ensuring it reaches the root zone. The hydrogen peroxide will help kill the gnat larvae and any eggs in the soil without harming your plant.
Where do gnats come from? Gnats come to find a breeding ground and place to lay their eggs. They seek out moist places, decomposing organic matter and damp soil of houseplants, and can be found around your trash or recycling bin.
If you don't have vinegar at home, bleach will kill drain gnats, but it's a potent environmental pollutant, so you're better off running to the store for vinegar, which is actually more effective for cleaning your drain pipes.
Use a small saucer to mix a few tablespoons of apple cider vinegar, a few drops of dishwashing soap and a little sugar. Put the saucer near the gnats. Use more than one saucer, if needed. The gnats will be drawn to the sweet solution, fall in and get trapped.
Or, you can switch up your favorite scent with something they don't like. Try Lighting citronella candles using lemon or vanilla sprays. While gnats are a fan of sweet-smelling fruit, they can't seem to stand vanilla, lemon, or even lavender. A little spritz can at least keep them at bay.
Gnats are insects that have two wings, long skinny bodies, and dangling legs. Fruit flies are also insects with four wings, are short and round, and typically have large red eyes.
To get rid of fungus gnats, mix a solution of one part hydrogen peroxide with four parts water. Pour the mixture onto the soil around the infested plant.
If you're spraying or watering the soil for fungus, eggs or larvae, be certain you really soak the soil. If you have any of these problems, you can use hydrogen peroxide on your plants once a week.
Prevent Fungal Disease
MAKE IT: Mix 1 teaspoon of baking soda and 2-3 drops of liquid soap in 1 liter of water. Spray the solution on the infected plants. Baking soda helps the plants become less acidic and prevents fungal growth.
Hydrogen Peroxide
A peroxide solution apparently kills larvae and eggs on contact, effectively killing off all infant gnats and disrupting the lifecycle. You should be able to buy hydrogen peroxide from any high street pharmacy or online.
Gnats are attracted to anything that smells fruity and sweet. Therefore, fruit-scented hygiene and beauty products tend to draw gnats into the house. Rotting food in the drain. A buildup of food in the drain would, over time, result in an infestation of house gnats.
Many of these “gnats” are not attracted to vinegar traps and may not be breeding in the kitchen area of the home. If your pest control professional identifies these “gnats” as fruit flies, then and only then, can we consider using vinegar traps as a tool to capture the adult fruit flies,' he says.
A diluted solution of Hydrogen Peroxide and water poured directly onto the soil will kill fungus gnat larvae on contact and help stop the gnats' life cycle.
In general, gnats go through the four life stages of egg, larva, pupa and adult, similar to other flies. The fungus gnats lay their eggs in moist organic debris or soil, which hatch into larvae. The larvae feed on organic matter such as leaf mold, mulch, compost, grass clippings, root hairs and fungi.
Kate's Home & Garden Plant Spray for Insects & Getting Rid of Gnats with 12 Gnat Sticky Traps. Fungus Gnat Killer & Gnat Control for Indoor Plants (16oz, Pet Safe, Non Toxic)