Mosquitoes are also attracted to humans by color!

Every summer there are people who are devoured by mosquitoes and those who survive. For scientists, there are three main reasons for this apparent injustice. † I always said there are three main signals that attract mosquitoes: your breathing, your sweating and your skin temperature. In this study, we identified a fourth signal:explains Jeffrey A. Riffelprofessor of biology at the University of Washington.

Mosquito bites not only cause itchy pimples, they are also a source of disease† The experiments were performed on Aedes aegyptiana kind mosquito vector dengue feverZika, chikungunya and yellow fever† Infectious diseases that wreak havoc in tropical countries. These diseases are also transmitted by tiger mosquitoAedes albopictus) That is present almost everywhere in metropolitan France and abroad

Mosquitoes prefer red

In their experiments, Jeffrey A. Riffel and his colleagues tracked the flight path of a million female mosquitoes, the only ones that sting to feed their eggs, in a controlled environment. This is a two meter long test chamber where theanimal has the choice between two colored targets. The scientists tracked the insect’s trajectory thanks to sixteen cameras and a system of follow 3D. It all starts with a jet of CO2a gas odorless to humans but very palatable to mosquitoes. Thanks to the camera system, the scientists were then able to see which colored target the insects went to first. They seem to prefer red, orange and black, while white, green and purple leave them indifferent.

So for mosquitoes, the color red would hold the promise of a good blood meal. † The red color is not only on your clothes, but also on the skin. Skin color doesn’t matter, we all radiate a strong red signature. Filter this colors attractive on our skin or avoiding wearing clothes of these colors can be another way to prevention mosquito bites Professor Riffel continues.

This preference for red is etched into the mosquito’s genes. Insects mutated by different genes became indifferent to red-orange stimuli. This also suggests that the observations made here are only valid for the species Aedes aegyptian and that other mosquitoes may prefer others wavelengths† Basically, when a mosquito searches for food, it is first attracted by the smell, before visually locating its favorite restaurant.

Mosquitoes have favorite colors too!

Article published on July 28, 2020 by Nathalie Mayer

Mosquitoes are among the main carriers of diseases that affect both humans and animals. And researchers have just made a discovery that could help better control this scourge. According to their work, mosquitoes are attracted – or repulsed – by different colors, depending on their species and the time of day.

“Conventional Wisdom Suggests Mosquitoes Are Attracted To” ultraviolet light (UV), and this in a non-specific way”says Todd C. Holmes, professor at the University of California at Irvine (United States) in a communicated† Hence the widespread use of UV lamps to combat this pest. “But our results show that things are much more complicated than that. †

The researchers studied the susceptibility of different types of mosquitoes to different types of mosquitoes light† By Aedes aegyptianthe mosquitoes of the yellow feverthat bite mainly during the day, and Anopheles coluzzi, vectors of malaria, which bite mainly at night. They found that the susceptibility of mosquitoes depends on their sex, species, time of day and color of light.

Fighting mosquitoes more effectively

For example, daytime stinging mosquitoes, especially females that need it for their fertilized eggs, are attracted to light during the day, regardless of its color. On the other hand, biting mosquitoes nightly specifically avoid ultraviolet (UV) and the blue light during the day.

“By understanding how mosquitoes respond to light in a species-specific way, we can develop new environmentally friendly alternatives to control insect pests more effectively. — in general — and the need for toxic pesticides that are harmful to the environmentconcludes Todd C. Holmes.

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