Why don't mosquitoes bite in autumn?

Why do mosquitoes bite people so badly in autumn? Many people have such questions. William bradshaw and Kristina Herza Pfeiffer, ecologists from Oregon State University, found that one of the reasons is that it is getting warmer and warmer in autumn, and the time when mosquitoes start to hibernate is delayed.

The researchers began to collect wintering data of animals from 1972. They made a statistical analysis of the winter-avoiding time of mosquitoes for more than 20 years, and found that today's mosquitoes wait an average of 9 days longer than those of 1972 before entering hibernation. Then, they analyzed the meteorological data for more than 20 years and found that with the slow increase of the average temperature in autumn, mosquitoes began to hibernate later and later. Therefore, with the intensification of global warming, people should not only deal with various climate disasters, but also spare some energy to deal with mosquitoes.

Mosquitoes generally start to be dispatched in May every year and reach the peak in the middle and late August. When the temperature drops below 10℃, the remaining mosquitoes will stop breeding, enter hibernation and stop eating. Many people think that mosquitoes only exist in summer and will disappear in autumn. In fact, early autumn and Mid-Autumn Festival are both active periods for mosquitoes. When the weather is too hot, the vitality of mosquitoes will weaken. The most suitable temperature for mosquitoes to survive is between 28 and 30 degrees Celsius, and mosquitoes are more active in rainy days.

Female mosquitoes bite people indoors. They suck blood in order to provide more nutrition for their offspring when laying eggs. Rainy autumn and pleasant temperature create more opportunities for mosquito breeding. Therefore, autumn mosquitoes bite harder, suck more blood and carry more germs, so there is a saying that autumn mosquitoes are more poisonous than summer mosquitoes. But the life span of mosquitoes is generally 1 to 4 weeks. As the weather gets colder, mosquitoes will gradually disappear within half a month after the Mid-Autumn Festival.

According to the statistics of the World Health Organization, nearly 1 10,000 people die of mosquito-borne falciparum malaria every year in sub-Saharan Africa alone. Do a good job of mosquito prevention for children in autumn.