First, at the earliest, scientists tried to kill mosquitoes with chemical drugs, but as you know, it didn't work. At present, everyone is daily.
Toilet water, mosquito-repellent incense and the like have not wiped out mosquitoes from the earth. Later, with the development of biotechnology, especially gene editing technology, scientists tried to use gene editing to transform mosquitoes. For example, through genetic modification of mosquitoes, the key point is to destroy the X chromosome of mosquitoes, so that the modified mosquitoes can only give birth to male mosquitoes and so on. ?
In addition, a field experiment was conducted, that is, the sterilized mosquitoes were put into reality. 3.3 million transgenic male mosquitoes have been released on the basis of experiments. Another large number of genetically modified mosquitoes were released in Brazil.
At first, the effect was obvious. For example, the number of mosquitoes dropped by 80-95 in a short time.
But as time went on, I found that mosquitoes came back.
One is the migration of other mosquito populations, and the other is the return of mosquitoes that were thought to have been extinct.
This shows that it is too difficult to kill mosquitoes.
Second, in fact, it is unrealistic for some technology companies to completely kill mosquitoes, and the cutting-edge technology of this matter has never been successful. Don't overestimate the existence of mosquitoes. Many people have an intuitive feeling about mosquitoes. Of course, people who do public health may be more concerned about infectious diseases caused by mosquitoes. In fact, human beings have always wanted to eliminate mosquitoes.
But if you look at Harmo's research on Alzheimer's disease, you will find that this disease accounts for 25% of the elderly over 80 years old, which seriously affects personal health.
If we pay attention to myopia, we think that more than one third of the population in China is nearsighted and knows about obesity, and nearly half of the adults are obese. Every disease is terrible.
However, in the case of limited investment and funds, there must be a trade-off. Although some people may say that mosquitoes are the main animals that cause human death in the world, they are mainly concentrated in tropical and subtropical countries. ?
Three, for China, the national report 10244507 cases of legal infectious diseases, including natural foci and insect-borne infectious diseases.
79,642 cases, less than 1, gradually promoting development.
Of course, this does not mean that mosquitoes are not controlled at all, but are promoted in an orderly manner. Don't put forward the slogan of eliminating mosquitoes easily.
At that time, in addition to the four pests, the whole people wanted to completely eliminate them. For mosquitoes, the main prevention and control is to solve the health level, which is the key. Mosquito breeding ground is an important factor, such as urban and rural garbage, sewage and toilets. The focus is on water.
If the family is not effective in killing mosquitoes, it will not only be fined, but also punished by imprisonment.
However, in 2020, public health in Singapore was neglected and dengue fever broke out soon.
This virus belongs to type 3. This virus type has not been the mainstream dengue fever type in Singapore for at least 30 years. In this way, it is difficult for local people to meet.
For this new mutant disease, it is unrealistic to eliminate mosquitoes and reduce mosquito breeding grounds. It is more appropriate to gradually control the harm caused by mosquitoes. The most dangerous animal in the world is the mosquito. More than 700,000 people die of various diseases caused by mosquitoes every year.
In order to fight mosquitoes, human beings have tried various methods to kill mosquitoes. The most important breakthrough is that male mosquitoes don't bite, only female mosquitoes bite. It is the use of radiation to castrate male mosquitoes, resulting in loss of sexual ability and release to nature, competing with male mosquitoes in nature for female mosquitoes, resulting in a decline in the overall fertility rate. Wolbachia is biologically related to male mosquitoes,
It can even lead to a longer life span of male mosquitoes and thus have an advantage in the war of female mosquitoes, but!
Once a female mosquito is infected with Wolbachia, a male mosquito can still have offspring whether infected or not. So when I was
When using IIT method to kill mosquitoes, scientists must ensure that male mosquitoes and female mosquitoes are completely separated. Once the separation is not complete, mixing a small amount of female mosquitoes with male mosquitoes will lead to the failure of this method. The difficulty of separating male mosquitoes from female mosquitoes can be imagined.
Previous researchers have been trying to improve the separation rate, while university researchers believe that even if the separation is incomplete, among them
Mixed with a small amount of female mosquitoes, but if these female mosquitoes lose their fertility, will they not be able to achieve their goals? So they combined IIT technology with SIT technology, so that male mosquitoes were infected with Wolbachia first, and then male mosquitoes received X-ray treatment.
Mosquito. This time, it is not to make the male mosquitoes lose their fertility, but to make the female mosquitoes lose their fertility, if there is any residue!
Because the amount of radiation that makes the female mosquito sterile is lower than that that makes the male mosquito ED, the male mosquito has no ED at this time. This job
The work also achieved good results and was published.
Wolbachia is necessary here, but nuclear radiation is not necessary as long as you have other ways to completely eliminate female mosquitoes. Google used artificial intelligence to develop a mosquito separation system to separate female mosquitoes. So is this plan.
Very promising.
If mosquitoes become extinct, the consequences will be very serious. They are an important link in the food chain, and many birds, amphibians and so on depend on this food.
If all mosquitoes are killed, it will have a domino effect on the food chain. The population of many animals that depend on mosquitoes will decrease, so their extinction will lead to the decrease of these animals.