We want to know if gnats are attracted to mold, and why? Gnats are often referred to as fruit flies, phorid flies, drain flies, and fungus gnats, but regardless of what you call them, they always seem to be flying around your garden or kitchen, for instance, seemingly out of nowhere.
In this article, we’ll be answering all the important questions you may have about gnats. How do you get gnats? Are gnats attracted to mold? And, most importantly, how do you get rid of these pesky insects?
Let’s start with the most basic question: where exactly do gnats come from, and why?
- 1 Where Do Gnats Come From?
- 2 Factors That Contribute to Mold Growth
- 3 The Link Between Gnats and Mold: 3 Reasons Why Gnats Are Attracted to Mold
- 4 Other Bugs That Mold Attracts Besides Gnats
- 5 What Else Are Gnats Attracted To Besides Mold?
- 6 Getting Rid of Gnats and Mold
- 7 Final Thoughts
Where Do Gnats Come From?
Gnats are unbelievably prolific with regards to reproducing. These insects will often rapidly increase in numbers over a relatively short period of time, especially if not dealt with immediately.
Female gnats lay their eggs in areas with moist soil or with aquatic vegetation. Once hatched, the young larvae will feed on organic matter such as rotting leaves, damp mulch, compost, decaying matter, and fungi, to name a few.
These eggs hatch in 4 to 6 days, and feed for 1-2 weeks at most. Female gnats can lay 100-300 eggs throughout their entire lifespan, and normally don’t live longer than 4 weeks.
These tiny flies will infest wet, humid locations like greenhouses or mushroom farms. They’re also commonly found flying around fruits and vegetables that aren’t stored in sealed containers. Including any food spillage, exposed garbage cans, and mold.
Factors That Contribute to Mold Growth
Mold doesn’t simply just grow anywhere, contrary to popular belief. In order to effectively fight the growth of mold, you’ll need to first understand the source.
Fungal growth is supported by four factors, and here they are:
Every species of mold requires a damp environment to grow and foster, so without water, it’s almost impossible for mold to grow.
Just like every other living creature, mold needs nutrients to grow. Most commonly it requires high-sugar or high-salt, which are often found in organic materials.
Examples of organic materials include wood and paper. Also, the remains of other organisms such as fruits, vegetables, plants, animals, and their waste products.
The most ideal growth temperature of molds is between 60 – 90°F, with approximately 70% relative humidity. That being said, there are other types of mold that absolutely thrive in high temperatures of above 115°F. This is why mold often grows aplenty in the Summer season, and not as much in other seasons.
In chemistry, pH is a scale that is used to specify the acidity of an aqueous solution, usually measured on a scale of 0 to 14. Room temperature water has a pH level of 7, for instance, and acidic solutions normally have a lower pH level than water, whereas alkaline solutions have a pH higher than 7.
Most mold requires a slightly acidic environment to flourish. The ideal level for molds is a pH range of 3-7.
The Link Between Gnats and Mold: 3 Reasons Why Gnats Are Attracted to Mold
If there is mold, then gnats often follow closeby. But why?
They Both Grow in Humid Environments
Mold, just like gnat larvae, grow on almost any substance where moisture is present. Both are also often found in cellulose-based building materials. This means that the more moisture you have, the more gnats you’re likely to find.
To name a few, plywood, drywall, composite wood flooring, and carpet padding are all considered food sources for molds.
Gnats Feast on the Decomposition of Molds
Laying eggs in places where there’s an abundance of mold makes its growth increasingly favorable.
This is especially true as these little creatures sustain themselves on the decomposition of mold. Because wet, moldy paper is easy for gnats to eat, as well as other damp and moldy household materials.
Some gnats even feed on soap scum and mildew that are found in bathrooms, because of the warmth and moisture that comes from the shower, so bathrooms are considered one of the biggest breeding grounds for mold.
Gnats Are Attracted to the Smell of Molds
Gnats are attracted to the smells molds emanate.
Molds secrete gasses called Microbial Volatile Organic Compounds (MVOCs), which are what give mold its unique musty odor, which is similar to the scent of wet socks or rotten wood.
For many homeowners, the smell is considered unpleasantly pungent. If you notice a sudden increase of gnats, then chances are it’s because hey’re attracted to the mold growing in your house.
Other Bugs That Mold Attracts Besides Gnats
Gnats aren’t the only insects that favor living close to moldy enclosures. This isn’t because insects eat the mold itself, no. It’s primarily due to the fact that they feast on its byproduct. Here are the top 5 common house pests that mold attracts.
Cockroaches feast on practically anything, including paper, because mold breaks down organic material, which makes feasting on paper and softwood so much easier for cockroaches.
Booklice, as its name suggests, consume the paper found in moldy books, and behind wallpapers, old magazines, and around windows.
Mold mites are the cousins of dust mites, who thrive off of the mold. These tiny, white bugs are commonly found in soil, homes, and rotting buildings, and have been documented to feed on fungi, molds, and yeast.
Mold and termites have a give-and-take relationship. Mold helps break down wood to make it easily penetrable for termites. Termites create tiny tunnels in the wood, which allows mold to reach a bigger surface area inside the wood.
Another reason why termites are so drawn to mold is due to the mycotoxins produced by most fungi. This makes wood infected by mold such as more appetizing.
Beetles, more notably the foreign grain beetle, is another insect that lives off of molds. They’re commonly found in homes with high levels of humidity, and in homes with wet lumber and building materials, for instance.
What Else Are Gnats Attracted To Besides Mold?
In a nutshell, gnats are attracted to three things:
- Organic Matter
Depending on the species, gnats can be found in a number of places. Here are a few places where you can find them, whether it’s inside or out of your home.
Outside Your Home
Your yard can be a gnat’s dream come true, because vegetable gardens, fruit trees, and flower beds entice a variety of gnats as it’s a great source of food and moisture. Gnats are likewise attracted to the mold that grows when one over-waters their lawn or flowerbeds.
In addition to this, many species of gnats are attracted to outdoor lighting in one’s yard.
Here are where gnats are commonly found outside your home:
- Drain, sewers, and septic tanks
- Soil contaminated with sewage
- Rotting fruits and vegetables
- Damp organic materials found in garbage heaps
- Trash found outside such as empty soda cans, beer bottles, vinegar, etc
Inside Your Home
Many of what attracts gnats outside your home would also attract them inside, so pay attention here.
- Soil of overwatered potted plants
- Overripe fruits and vegetables
- Uncovered drains
- Left out food on the table
- Decaying organic matter found in garbage cans and sink drains
Getting Rid of Gnats and Mold
Household mold and insect infestations should be dealt with as soon as possible. Both quickly spread uncontrollably throughout one’s home. It’s worth noting that they may cause a serious problem, but only when left untreated.
Here are some tips on how to get rid of gnats inside your home once and for all, because no one enjoys a pest.
Step 1: Identify the Pest
There are four common types of gnats: fruit flies, drain flies, phorid flies, and fungus gnats.
Fruit flies are brown with red eyes, and typically round in shape. These gnats are commonly found in the kitchen, feasting on food that’s left out on the table.
Drain flies have moth-like wings, and have a fuzzy body. As its name implies, it’s commonly found in drains, sewers, and septic tanks.
Phorid flies look a lot like fruit flies, but have black eyes instead of red. These insects are attracted to garbage, drains, and rotting vegetables and fruit.
Fungus gnats are black with long legs. They’re found in decaying organic matter in moist soil and overwatered potted plants.
Step 2: Eliminate Its Breeding Ground (Mold)
Mold and gnats grow in damp areas, so you’ll need to find out where this moisture comes from. It may come from plumbing leaks, ventilation or drainage issues, peeling paint, rotted window sills, wet or rotting sheathing, etc.
Often, these issues can be taken care of without the need of a professional, but it’s definitely a good idea to call for one if leaking persists.
Step 3: Eliminate Food Sources
This is best done by cleaning your kitchen, and throwing rotting fruits and vegetables. Also, sealing your drain, replacing old wood, covering your trash cans, and avoiding over-watering your potting soil.
Step 4: Use a Bit of Force To Get Rid Of Gnats
And by this, I mean using products that aid in killing gnats, because they can be tricky
Such products are as follows:
- Pest Control: Dual sided sticky bug cards for mosquito, leafminer, aphid, and other flying pest problems. Perfect for protecting your best inside...
- Easy To Use: Peel off a trap from the stack and place in a houseplant, a home kitchen, or a garden. Highly rated zapper catchers to finally protect...
- Organic Gardening: Safely remove small pests with no harsh ingredients. Fruit Flies, Gnats and other small flying insects are attracted to the yellow...
- Kensizer Yellow sticky traps specially designed for trapping flying plant pests, bright color attract flying insects, great for outdoor or indoor...
- Great for capturing aphids, leaf miner, fungus gnats, thrips, white flies, black flies, midges and other flying plant insects.
- Safe and non-toxic, odorless, reduce the use of chemical insecticides, allowed in organic farming. No need to replace them until fully covered with...
- Bug zapper outdoor with UV light to attract mosquitoes and flying insects, 4200w grid will immediately electrocute the mosquitoes and flying insects.
- Mosquito killer housing is made of ABS plastic, preventing people or pets from accidentally touching the Mosquito trap
- Mosquito zapper covers an area of 1500 sq ft and can be used at home, patios, balconies, gardens, etc.
- REPELS MOSQUITOES: 7 percent DEET formula repels mosquitoes, including those that may transmit the Zika, West Nile, Dengue and Chikungunya viruses
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- ALSO REPELS TICKS, GNATS, BITING FLIES, CHIGGERS & FLEAS: Create a barrier against annoying bugs that can spoil the outdoorsCONTAINS ALOE AND VITAMIN...
- Bug sprays
- EFFECTIVELY REPELS - NO NATZ is proven to work very well against gnats, no-see-ums, sand gnats, mosquitos, and biting flies. Developed in 2002 on the...
- Hand-Crafted Safe Formula - NO NATZ is a hand-crafted formula made with the finest essential oils including: rosemary oil, lemongrass oil, geranium...
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For a more natural solution, you can always use apple cider vinegar traps to kill fruit flies. Here’s how to make it:
- Pour apple cider vinegar into a glass or remove the cap from a bottle
- Cover the opening with a plastic wrap
- Secure with a rubber band
- Poke small holes with a toothpick for fruit flies to enter, and they will be trapped
Are gnats attracted to mold? Yes, they are, and now you know all you need to know to prevent them.
Gnats and mold will most likely disappear once you follow the steps mentioned above. However, if you’re facing a severe infestation, do call a pest control professional to exterminate these gnats.