ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Natural, Nontoxic, Vegan Fungus Gnat Control

Updated on May 3, 2015

Fungus Gnats

It's happened to many of us: we bring in houseplants for the winter, or let a banana stay out too long, and before you know it, your house is filled with those annoying little pests, flying in your face (and I should know, I inhaled one!) and making your life miserable. Never fear, I conquered my gnat infestation (mine came about because I didn't wash organic lettuce before bringing it inside), and you can, too!

Gnats have been around forever!
Gnats have been around forever! | Source


I have tried several methods, and all of them work. It's just a matter of choosing the right method for you. This will depend on your personal preferences, as well as your home environment.

First off, try to determine the original source of the infestation. In the case of bananas left out too long, or the unwashed organic lettuce, you don't have to do anything else except prevention. But if your source is houseplants, or leaks in your roof, windows, or walls, you will want to fix this problem first, or the infestation will happen over and over again.

Fungus gnats feed on decaying organic matter, and so decaying wood is a perfect food source. If it turns out that this is the case, call a certified professional to deal with your problem, whether that is a roof or a window, or something else (this may even be a sign of a more serious problem, such as termites).

In the case of houseplants, letting the top two inches of soil dry out completely will prevent more infestations from occurring. A layer of mulch or sand may deter future infestations.

These pests are attracted to the color yellow, and to the odor of fermenting stuff, so these two factors will be the basis for our control.

How have you tried to deal with a gnat infestation?

See results


Sticky flypaper will work just fine to catch the adults, which are the most annoying. It's important to catch the adults as much as possible because the female will lay up to 300 eggs in its lifetime, and therefore you don't want the infestation to get any worse.

Another method for catching adults is to use vinegar (or any fermented product). I had the best success with a few drops of wine or beer in two ounces of water, and a single drop of dish soap in a yellow container (I used a plastic lid from a margarine container). The gnats will fly into this, become intoxicated, and drown. You can use white vinegar and add a little sugar, or apple cider vinegar. The dish soap is essential to alter the surface tension of the water. Be sure to change this every few days or the smell will be overpowering.

You can also use the soda-bottle trick. Cut a soda bottle in half, and remove the label. Remove the lid and drill a small hole in it, then replace it. Put something that will rot (a banana skin, a piece of fruit, etc.) in the bottom half and cover with water, then invert the top half and insert it into the bottom half. The gnats will fly through the hole but won't be able to get back out (see the video if you're having problems understanding this).

Larvae Trap for Houseplants

There is an easy way to get the larvae to come to the surface of the soil so that they can be disposed of. Simply cut small slices of raw potato and lay them directly on the soil. After twenty-four hours, turn the potato slices upside down, and if you have fungus gnat larvae, you will find them feeding on the potato. Simply take potato and all and dispose of it however you think is best.

Make Your Own Sticky Paper

This is very easy to do. Simply get yellow construction paper, yellow posterboard, post-it notes, or anything yellow. Paint with one (not all) of the following:

  • Rubber cement
  • Petroleum jelly
  • Corn syrup

Place this anywhere you have seen the gnats. It can be hung up or laid down. The fungus gnats will stick to this and you can just throw it away.

A Not-Quite Vegan Solution

Although this does not involve killing anything but fungus gnats, some ultra-strict vegans may be uncomfortable with this method. It involves introducing nematodes (microscopic worms) into your houseplant soil. These worms will eat the fungus gnat larvae and save you a great deal of trouble. Nematodes also control a number of other pests, including fleas and slugs, so if you feel okay about using this method, it will probably be worth it.


Submit a Comment
  • ologsinquito profile image


    4 years ago from USA

    This is a good non-toxic solution to pest control. There's no need to use dangerous chemicals when we have this and other natural remedies to combat an infestation.

  • bravewarrior profile image

    Shauna L Bowling 

    5 years ago from Central Florida

    Classicgeek, this information is awesome. I don't have a problem with these pests in the house, but I like the idea of introducing nematodes (which are actually good for the soil and compost bins) to something outdoors to deter fleas from coming into the house.

    Great info - thanx!


This website uses cookies

As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

Show Details
HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
LoginThis is necessary to sign in to the HubPages Service.
Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
AkismetThis is used to detect comment spam. (Privacy Policy)
HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
MavenThis supports the Maven widget and search functionality. (Privacy Policy)
Google AdSenseThis is an ad network. (Privacy Policy)
Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
Index ExchangeThis is an ad network. (Privacy Policy)
SovrnThis is an ad network. (Privacy Policy)
Facebook AdsThis is an ad network. (Privacy Policy)
Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
AppNexusThis is an ad network. (Privacy Policy)
OpenxThis is an ad network. (Privacy Policy)
Rubicon ProjectThis is an ad network. (Privacy Policy)
TripleLiftThis is an ad network. (Privacy Policy)
Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)