When it comes to mosquitoes, we all hate to itch our teeth, but we can see that the weather cools down, but mosquitoes are rampant. Even the mosquitoes in autumn seem to hurt more than those in summer. What's the matter?
Autumn wind, autumn rain, why can't the mosquito be killed by freezing? Is autumn mosquito really more poisonous than summer mosquito?
The reporter learned that a few days ago, the vector Department of the Institute of infectious disease prevention and control of Zhejiang CDC just did a study on the relationship between mosquitoes and climate conditions. Let experts tell you about mosquitoes.
Many mountains are close to the sea and inland, where are mosquitoes more?
Depending on the mountain and the water, there will be different climates in different geographical environments. There are various geographical environments in 11 cities of our province. Which environment is more suitable for mosquitoes?
Researchers from the provincial CDC collected meteorological data and mosquito density monitoring data of Hangzhou, Quzhou and Wenzhou from January 2007 to December 2013. Why do you choose these three places? Said Guo song, a doctor in the vector Department of the transmission and Prevention Institute, because these three places just represent three geographical environments of our province: Hangzhou represents the plain area, Quzhou represents the mountain area, and Wenzhou represents the coastal area.
'the result is no difference, these geographical environments are suitable for mosquito breeding. 'globally, mosquitoes are found on all continents except Antarctica,' Mr. Guo said. 'because the study found that temperature and rainfall are closely related to mosquito breeding, and the climate characteristics of 11 cities in our province are suitable for mosquito breeding.
Are there more mosquitoes in autumn than in summer?
What's the relationship between temperature and rainfall and mosquito breeding? Guo song gives a chain: the most suitable temperature for mosquito growth and breeding is 20-30 ℃, and the most suitable humidity is about 70%.
It's very suitable for mosquito breeding and growth. 'said Guo song.
Do you remember the summer of 2013 in our province? There were even more than 40 ℃ continuous high temperatures in many places. Did you feel that mosquitoes disappeared in that summer?
'the temperature is too high or too low for mosquitoes to survive. Therefore, there are two peak periods of mosquito reproduction and growth in our province, around June and after autumn, i.e. August to September. 'the temperature of both periods is suitable for mosquito growth, and the rainfall is relatively abundant,' Guo said.
Mosquitoes like rain very much, because there will be water after rain, the more water, the more mosquito spawning place. If the temperature is just right at this time, mosquitoes will grow in large numbers. Therefore, summer mosquitoes may not be as many as autumn mosquitoes, but people feel that they are bitten more in summer, maybe they wear less in summer, and they have more chances to bite the mosquito in the mouth.
Are mosquitoes really poisonous in autumn?
After finishing the secret recipe of mosquito fighting, let's talk about the most common mistake among the people: are mosquitoes really more poisonous in autumn than in summer?
'no, there is no change in the species of mosquitoes in summer and autumn. After being bitten by a mosquito, it will pack up because when the mosquito sucks blood, it will inject saliva containing anticoagulant, digestive enzyme, formic acid and a variety of unknown proteins into the human body, causing allergic reactions of the human body, so it packs up. "Guo Song said, however, the phenomenon of bag lifting varies from person to person. People with allergic constitution will swell greatly, and it is not easy to subside. When necessary, they need to use some ointment.
However, in terms of the process of mosquito breeding and development, autumn is the last breeding season for mosquitoes, and the blood sucking mosquitoes are all female mosquitoes, with the task of passing on their families and laying eggs. In order to give birth to the next generation, provide more nutrition for future generations, and better winter, mosquitoes also need to make up for it, so the appetite of autumn mosquitoes will be bigger than that of summer mosquitoes, and they will bite people more fiercely.