NO-SEE- MIDGES, BUT FEEL THEM
It happened unexpectedly.
Tabatha Yang and her six-month-old son, Karoo, were sitting on their lawn last Sunday at their West Davis home, when she saw red. Literally.
One minute they were enjoying the springlike weather, and the next minute his head was covered with bright red dots. Looking closer, she spotted a tiny insect in his eye, which she quickly removed.
Then her legs began to welt and itch.
They had just encountered no-see-ums, tiny Valley Black Gnats that feed on blood.
“The adults are emerging in large numbers now and need blood so residents need to beware of grassy areas that cover alkaline clay soils,” said Lynn Kimsey, director of the Bohart Museum of Entomology and professor entomology at UC Davis. “These insects are ferocious biters. Even though they don’t spread any diseases, they are sufficiently annoying to keep people indoors in some areas of California.”
The Bohart Museum is now fielding scores of calls and emails.
“These no-see-mosquitoes are smaller than fleas and have a supreme itch,” said Yang, Bohart Museum education and outreach coordinator, who knew immediately what they were.
The midges are particularly troublesome along the west side of the Sacramento Valley, including Davis and Woodland. “They’re often in grassy areas, such as in parks and on golf courses on the west side of California’s Central Valley,” Kimsey said. “When the soil begins to dry and cracks develop, the adults emerge.” The complete life cycle from egg to adult takes about two years.
The no-see-ums belong to the family Ceratopogonidae and are about 1/16-inch long. They are so tiny they could pass through window screens, but they don’t, Kimsey said. However, they can and do slip beneath loose clothing, unnoticed, to get a blood meal. Like mosquitoes, only the female no-see-ums bite. The insects breed when the weather warms in the spring, usually in May and June, and they remain a pest for several weeks, Kimsey said. They need a blood meal to complete their reproductive cycle.
They also bite domestic and wild animals and birds. The females inject saliva into the skin, which pools the blood just beneath the surface, resulting in a small red dot that becomes excruciatingly itchy. A single bite can welt into a one-or two-inch diameter spot, which lasts about two weeks. Kimsey cautions people not to scratch the welts, as scratching makes the itchy bites last twice as long and can lead to infected sores.
To avoid being bitten, Kimsey recommends that you limit exposure by not sitting long in places where they are likely to occur, or where you’ve heard of problem areas. “Move quickly through the area.”
“Repellents,” she added, “aren’t effective against these flies.”
How to prevent those no-see-flies?
Use mosquito trap to prevent small flies’ biting. How do QM mosquito traps attract and kill mosquitoes? Mosquitoes are first attracted to a trap by smell. They can smell CO2 around 100 feet from a trap and start to fly towards the source. Next Octenol and Lactic Acid start to be perceived around 50 feet. As the insect continues toward the source, the color, lights and apparent movement in some mosquito traps add more attractants. Mosquitoes can only see about 30 feet.
Finally, as they get within around 3 feet, the mosquitoes are further attracted by the heat and moisture from the CO2 release (if present). They are sucked into the trap by a fan into a container. These are mosquito killer machines from which they cannot escape.
Why is QM mosquito trap better than the other? The shape, size, color and height of the mosquito machine can make a huge difference. So does the amount of CO2, octenol and/or lactic acid released. Some frequencies of lights work better than others. The way the fans are designed to draw them in makes a big difference. Finally, placement of the devices is very important. A good trap in the wrong location will not be effective. MBOX mosquito trap uses a new and highly effective method to catch mosquitoes.
First we have to understand that only female mosquitoes need blood (protein) in order to lay eggs. Female mosquitoes track their victim through CO2 up to a range of 50meters, combined with the sense of smell of H2O, female mosquitoes are very effective in tracking their victim.