If you let it dry out completely before your next watering, it will get rid of the gnats in the soil and discourage new adults from laying their eggs. You can repeat these steps if needed! The hydrogen peroxide solution kills fungus gnat larvae on contact. Here’s how to naturally treat your houseplants and get rid of gnats in the soil. We hate spam. After all, they’re tiny and have no issue flying up your nose, into your food, or pretty much any other place you don’t want them to be. During the larval stage, the fungus gnat larvae feed on whatever organic material is in the soil, including the plant roots. Adult fungus gnats cannot hurt your plants; they just annoy us humans and do a very good job reproducing. Place the bowl near your houseplants. You have to control adult fungus gnats to stop those pesky gnats from flying around your house and laying hundreds of eggs. Bti is not the same as the Bt bacteria that controls caterpillars. As such, this annoying insect has earned the honor of being discussed first. I have tried everything to get rid of these gnats, the baking the soil mix, the Proxide soak, the sticky traps, the Store bug spray, the dish soap and water. If the soil stays wet for long periods of time, consider repotting with fresh potting soil. When your plants need to be watered next, water the plants using a solution of 1 part 3% Hydrogen Peroxide to 4 parts water. I would avoid beach sand because it may bring in more critters! Fill about the bottom one-half of a deep bowl with apple cider vinegar. Without their needed source of food available, they won’t want to lay their eggs. © Copyright 2020 Hearst Communications, Inc. All you will need is a spray bottle, dish soap, water and/or baking soda and vinegar. Place this mix into a spray bottle, and shake well. I would like to get some sand but I am not sure where to buy or what kind. They lay eggs in the top of the soil. Why trust us? Can’t wait to try these suggestions. The same goes for any area inside your home–especially your kitchen and bathroom. If you are only interested in a certain section of the blog post, just click on that section in the table of contents below to jump right to that section! Alternately, add the beneficial bacteria Bti (Bacillus thuringiensis subspecies israelensis) to the soil. Once both the adults and larvae are under control, then you can put measures into place to help prevent fungus gnats from reoccurring in the future. After watering all of the plants with beneficial nematodes, the adults stop appearing within a week or so. Hi Monique, you can use play sand, horticulture sand, or craft sand – whatever you like. Lately I tried the screened sand on top and a coffee filter at the bottom with an elastic. Does it matter what type of sand? Prevention participates in various affiliate marketing programs, which means we may get paid commissions on editorially chosen products purchased through our links to retailer sites. For adult gnats, use a solution of two tablespoons of vinegar and few drops of dish soap … All Rights Reserved. Add a few drops of dish soap to the liquid. The tiny black bugs thrive in soil that is continually moist and rich in organic matter. Required fields are marked *. Empty the bowl and replenish it with a new batch of the mixture periodically. Ugh! Choose something that you like for each course to successfully eradicate fungus gnats! If gnats have invaded your space, you can spend a lot of time trying to take them out, one by one. Thank you for the advice. Generally a concentration of one tablespoon dish soap in a quart of water is strong enough to deter fungus gnats without bothering your plant. Within a week or so, adults should stop appearing because larvae are gone. Hunting adult gnats down 2/3 times a day with a spray bottle to kill them.