You can repot the plant, replacing as much of the old soil as possible or The thing to learn here is, once you find all the fungus gnat larvae are A strange, surprise photobomber on a toothed fungus (on a fallen, dead tree). Fungus gnats are not dangerous to people, they do not transmit disease nor do they bite or sting. Control Fungus gnats are really only of concern if they are causing damage to seedlings or cuttings; established plants are not harmed. I came across with this strange and rare procession of hundreds of tiny larvae in my own yard. So, getting rid of these bugs from houseplants is a top priority. When it comes to using biological means of controlling insect infestations , you’ll need to keep careful control of the parameters surrounding your plants, as all insects need specific parameters to stay alive. Meanwhile, a moist growing medium is also critical to the survival of the larvae as well so watering less is also very effective against each stage of the fungus gnat lifecycle. Fungus Gnat larvae attack plant roots. They are annoying but harmless. Damage This fly can cause nuisance in urban area. Fungus gnats are usually pests of indoor plants. Fungus gnat larvae feed on fungi, decaying organic material, and live plant tissue. Fungus gnats can carry fungal diseases to other plants. They have dark heads. Plants in soil that is infested with larvae may show symptoms of wilting, poor growth, and yellowing. The are white and legless, about 1/4 inch long when mature, and have a shiny black head. However, they can also feed on fine roots, root hairs and tender lower stems, causing direct damage to plants It takes a hatched egg Are Fungus Gnats Dangerous? Larvae are tiny when hatched and can grow to 5.5 mm in length Lifespan Adult fungus gnats live seven to ten days. They live two to three inches beneath the potting soil of a plant. Fungus gnat larvae will die on direct contact with the H202. Established plants are unlikely to be damaged by fungus gnat larvae. Fungus Gnat Life Cycle What's nice is the adult fungus gnat only lives around one week, but in that time they can lay up to 300 eggs each. Their long legs and long antennae give them a mosquito-like appearance, though they are much, much smaller in size. They resemble mosquitoes, with long legs and transparent wings. If you becomes suspicious that one of your plants has become infested with the larvae of fungus gnat, you can just grab a magnifying glass and perform a close-up inspection of the soil. Sporting a whitish, transparent body, they’re Adult fungus gnats will jump or fly between plants when there is a threat. Larvae harm the roots of your plant, so look for symptoms related to root damage. Fungus gnats are tiny insects about the size of a fruit fly.Unlike the fruit fly, though, they are not attracted to certain smells or products, but to moist soil and decaying organic material in plant pots. This genus is often found on hardwood fungi. Some Quick Fungus Gnat Facts Size Adults are about 2.5 mm in length. Appearance: Adult fungus gnats are a grayish-black color and have gray or see-through wings. They thrive in wet, over-watered conditions, and tend to exist in the upper soil profile, but may live near drain holes. They are annoying, but harmless and do not harm indoor plants. Fungus gnats comprise two entire families of flies, but in greenhouses, most commonly we see Mycetophilids, especially Bradysia coprophila and B. impatiens. If you notice leaves that wilt suddenly, start turning yellow, or start dropping off the plant for no apparent reason, it could be fungus gnat larvae. Fungus gnat larvae feed on highly organic soils and can damage plant roots. The adult fungus gnat can lay up to 200 eggs near the surface of the soil; the hatched eggs become larvae which burrow into the soil to feed on fungi in the soil. How to Get Rid of Fungus Gnat Larvae: Here are some very simple ways to get rid of those larvae. It’ll get the stick off and leave you with nice soft hands. Identification Fungus gnat larvae (Bradysia spp.) Fungus gnat larvae live in the growing media and generally feed on decaying organic matter, soil fungi and algae. Adults are brown to black, and their wings are light to clear and have a Y-shaped vein. They feed on the roots and weaken the plant. It seemed to be surrounding the fungus and itself with a web of goo.

Update and more info:
This is likely Keroplatus (most fungus gnat larvae do not get this large). Larvae: when you disturb the soil by watering or probing, look for tiny silvery insects crawling rapidly around soil particles – these are the fungus gnat larvae! In addition to feeding on roots Color of Fungus Gnat Larvae are whitish to clear with a black head. The name of “gnat” is applied to certain small flies and fungi serves as their major food for larvae. After the fizzing stops, the H202 will break down into harmless oxygen and water molecules, supplying water to the plant. The adult is mosquito-like in body shape, about 1/8 inch long, with long legs, a clear pair of wings, and long antennae. The larvae of fungus gnats are not particularly fussy, and will feed on any organic matter. The fungus gnat maggots will chew and strip roots, often causing poor growth in plants as well as discoloration and even a loss of foliage. Dark winged fungus gnat Photo: Paul Langlois, USDA APHIS ITP, Bugwood.org Key Points Fungus gnats are tiny, black flies that are commonly seen around lamps and windows. The larvae or maggots are 1/4 inch in length. Fungus gnats are tiny, black flies that are commonly seen around lamps and windows. Let Your Plants Dry Out. Fungus gnats are weak fliers and are frequently observed resting on the media in the pot or running over the foliage or other surfaces. Its mechanism of action is to interfere with chitin production and deposition and it also triggers insect larvae to molt early without a properly formed exoskeleton, resulting in the death of the larvae. It’s a flying insect that infects fungus gnat larvae. They infest potted plants and enter Fungus gnat larvae grow between 1/8th and 1/4th of an inch. These pests spend most of their adult lifespan flying around well-lit areas and landing on people, food, and surfaces. The larvae breed in moist soil, primarily in potted plants containing soil rich in organic matter. Fungus Gnat Larva (Keroplatus sp.). The main caveat with this strategy is how to balance reduced moisture in the soil with keeping your plants alive and happy. mass of larvae Location: suburbs of New York City September 23, 2011 10:04 am Hi, What are these? Gnat larvae feed on fungus in potting soil where they can affect the health of young plants or weak plants. This not only weakens the plant directly, but can make it more vulnerable to diseases which Fungus Gnat larvae themselves can pass on. Outdoors, when a lawn has lots of organic matter or thatch, the larvae can hatch in such numbers that they travel as a group The fungus gnat’s larvae are worm-like in appearance, the body of the larvae is translucent and they have a black head capsule. African violets, poinsettias, and geraniums are especially prone to injury caused by fungus gnat larvae feeding on roots. They bore through potting soil and eat plant roots. In about 4-6 days these eggs hatch into larvae and begin snacking on the roots of your Their heads are small and hard to see. Fungus gnat Fungus gnat is under Diptera Order. Nematodes are microscopic roundworms that penetrate fungus gnat larvae, as well as harmful lawn and garden grubs, fleas, and other soil-borne pests (they do not harm earthworms), and then release a bacterium that consumes Tips If you use yellow sticky cards and get the “sticky” on your skin, vegetable oil works wonders. Fungus gnat larvae can cause plant damage by eating plant roots. As annoying as they are, the biggest problem the insects create is breeding, which starts the Fungus gnat life cycle … According to It is applied to infected soil and will kill fungus gnat larvae for 30–60 days from a single application. When the This seems like a terrible idea, but it works. At around 2mm long, a fully-grown fungus gnat is no thicker than a dime. Repeat your H202 treatment once a day until you no longer see any more fungus gnats flying through the air, or larvae or maggots in your soil. Fungus gnat larvae may be up to ⅛ of an inch in length. Once they do this, they settle down in the potting mix and lay another batch of eggs. Gnat larvae can be killed but you should first determine whether these flying insects are really fungus gnats or another flying nuisance such as fruit flies. Unlike larvae, mature adult Fungus gnats are simply a nuisance. Photo attached Thanks Signature: Jane Hi Jane, You have an aggregation of Fungus Gnat Larvae. The larvae have a clear body. They almost look like tiny, wriggling snakes. Nematodes are microscopic worms, available at garden supply and home improvement stores, that dig into the soil and feast on fungus gnat larvae—and they don’t cause any … After about two or three weeks, the fungus gnat larvae pupate in the potting soil. 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