Mayfly: The pesky little flies

Don’t let the “flies” portion of this insect’s name fool you; they begin their life underwater! The majority of the insect’s life will be spent underwater until it reaches adulthood. Adults leave the water to mate and live anywhere from two days to a week. The mayflies are aquatic insects belonging to the order Ephemeroptera. Mayflies are relatively primitive insects and exhibit a number of ancestral traits that were probably present in the first flying insects, such as long tails and wings that do not fold flat over the abdomen.

During mating swarms of mayflies are known to pile up on surfaces and roads, coating them in a mat of living insects. This makes these insects more of a nuisance, with rare cases of car accidents caused by a lack of visibility from a buildup of mayflies on windshields.

The nuisance of mayflies is typically only present for the one or two weeks a year in the springtime when adulthood is reached and mating begins. After that, it’s back to their eggs and underwater development.

Mayflies are attracted to light. They gather in large numbers around homes and commercial buildings. They can result in massive swarms around buildings at night and piles of dead flies below lights and windows in the morning.

The sheer numbers of these insects during their mating season can cause problems for drivers and annoy homeowners whose houses are coated with bugs. The dead bodies and shed skins of mayflies can also cause an allergic reaction in some people.

Mayflies are a particular nuisance pest for those who live near the lakes and streams where they live and breed. Mayflies may cluster on houses and buildings during mating, becoming an annoyance to homeowners. They may also cover roads, making it difficult and dangerous to drive. Some people also have allergic reactions to the shed skin and dead bodies of mayflies, which dry up and crumble and become airborne.

Mayflies descend on Nekoosa stores

July 19, 2017, Daily Tribune

“Along the Mississippi River there have been clouds of mayflies that are so large that they have registered on the weather radar,” Liesch said. “These clouds can include billions of mayflies.”

Liesch said mayflies are a bit of a nuisance, but are completely harmless to humans.

“There’s nothing effective to get rid of them, and because they only live a day or two, it’s not worth spraying.”

Heckendorf said there still were mayflies at the store Wednesday afternoon, and gas station employees were attempting to spray them away.

Unbelievable: Swarm of mayflies covers car near Port Clinton, Ohio

Mayflies cover car parked at the Miller Ferry lot on Catawba Point (Source: Facebook)

By Chris Anderson | June 27, 2019

CLEVELAND, Ohio (WOIO) – Swarms of mayflies invaded Northeast Ohio’s lakeshore overnight, blanketing cars and homes that were in their path.

Unbelievable photos shared on Facebook shows a car covered in the pests at the Miller Ferry parking lot along Lake Erie.

Mayflies cover car near Port Clinton (Source: Facebook)

The mayfly swarms were so dense overnight, they were caught on weather radar.

As annoying as they are, mayflies are completely harmless. They tend to congregate under bright lights and rest on the side of cars or buildings.

The sky was just BLACK’: Small Pennsylvania town invaded by a plague of mayflies as ‘nuisance season’ hits full peak 

1 July 2016, Daily mail

A small riverside town in Pennsylvania has been invaded by a plague of mayflies that have taken over houses and cars and even blackened the sun.

The swarms of insects have been emerging from the Susquehanna River in Columbia, to the extent that locals have described what’s happening as like a ‘blizzard’.

Mr Fine said that one of the worst parts of dealing with the pests was that, simply, there is no way to really deal with them – you just have to wait for them to die, and then clean up the mess.

Locals have been cleaning up the mayflies that have strew their doorsteps and porches, but handling the live ones is a lot harder.

Mayfly nymphs are an important component of many freshwater ecosystems. Grazing by mayflies is important in preventing the build-up of a large biomass of aquatic algae and detritus, and in nutrient cycling.

The most common tool used to manage mayflies is insecticides. However, besides being extremely toxic and harmful to the environment, most insecticides used for mayflies control will destroy beneficial insects.

Now, we no longer have to depend on these conventional, toxic insecticides to deal with these pests!

C Tech Corporation offers a range of non-toxic, non-hazardous anti-insect aversive, which can be successfully used to keep pesky creatures at bay.

Termirepel™ can be easily described as insect aversive, used also against all types of insects and which works on the mechanism of repellency. It means that it does not kill the target insects but only repel them, thus balancing the ecology and helping in maintaining the goal of sustainability. There are more than 500 species of insects against which this product works. This product can be easily used against a number of insects.

The product available in the form of liquid concentrate can be mixed in paints in a specific ratio and can be applied to the interior and exterior of houses, school, hospitals, warehouses, etc. to keep these areas safe from the mayflies.

The product available in the form of lacquer can be used as a direct application and is compatible with most of the surfaces like wood, metal, concrete, polymer, ceramic, etc.

Our product works on the mechanism of repellency. It temporarily inhibits the mating cycle of the insects. The product impairs the ability of the insects to reproduce, that is the insects will not lay eggs or the laid eggs will be infertile. The product causes feeding disruption in an insect by triggering an unpleasant reaction within the insect which might try to feed on the application. The product temporarily blocks the reproduction system of the insects by hindering the release of the vital hormones for growth.

Termirepel™ is thermally stable and does not degrade on exposure to heat and sunlight. It does not kill or harm the insect but repels them. It does not volatilize and does not degrade the soil. It is RoHS, RoHS2, RoHS3, REACH, APVMA, NEA compliant and FIFRA exempted.

Contact us at to keep the pests away.

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