Mosquitoes are not only annoying but also the number one killer of mankind!

　　One of the four mosquito kingdoms in the world is on the Ertiz River in Xinjiang, China. The density of mosquitoes there is as high as 1,700 per cubic meter. If you slap it, you can kill 40 to 50 mosquitoes. According to statistics, there have been seven military dogs killed because of mosquito bites. Frontier guards wear thick protective clothing and veils in winter and summer, which can be regarded as patrolling with their lives.

　　The Scottish Highlands are also plagued by mosquitoes, where the scenery is beautiful and the air is fresh. Everywhere is good except for the mosquitoes, which directly affects Scotland's tourism industry.

　　Every summer, tourists from all over the world come here, shocked by the scene, from a country where only ordinary mosquitoes exist to a country where there are Hemophilus in Scotland. Keep asking: What is that? What is that?

　　You hate it, but you can't kill it. That's the true picture of the relationship between human beings and mosquitoes. But the Gates Foundation once made a statistic about who killed the most animals in the world. Not lions, not snakes, not even human beings themselves, but mosquitoes! Because mosquitoes are the vectors of malaria, yellow fever, dengue fever and other diseases, they can kill an average of 830,000 people every year.

　　Get out of here, Mr. Mosquito! Mankind's all-out war against mosquitoesAlthough the fact that mosquitoes transmit diseases and viruses has existed objectively, it was not until 1897 that Ronald Ross, a British doctor, first proved this fact. This also means that human beings formally draw swords to mosquitoes and the horn of battle sounds formally!

　　At the beginning of the 20th century, people began to take the path of physical mosquito control.

　　Phase I Physical Mosquito Control

　　For example, mosquito larvae are called gongdao. When they hatch in water, they come out to breathe. Therefore, people drain water or pour oil on the water, so that they can kill mosquito larvae and kill mosquitoes in the cradle. And the effect of this approach is more remarkable, the U. S. government used this tactic, so that workers are no longer troubled by mosquitoes, before successfully opening the Panama Canal.

　　But obviously, we can't drain every water area. Physical mosquito control was too time-consuming and laborious, so people then turned their attention to chemical mosquito control.

　　Phase II Chemical Mosquito Control

　　That's DDT, which became famous all over the world. Some people study mosquito repellents, while others spray chemicals where they think mosquitoes breed.

　　Although DDT has strong medicinal properties and significant effects, it also has hepatotoxicity. It accumulates through the biological chain, and ultimately has the greatest impact on the top of the food chain. Right, it is human itself. Additionally, mosquito resistance to DDT has increased 100-fold in the past few years. By the 1970s, DDT was banned one after another.

　　So, what's more environmentally friendly? At a time when mankind was at a loss, pyrethrum, a plant with its own insecticidal halo, attracted people's attention.

　　Following the plant, human beings have mosquito incensePyrethrin in pyrethrum can act on insect nervous system and kill mosquitoes, but it is harmless to mammals. From this, artificial pyrethroid was invented, and various mosquito incense and electric mosquito slices were manufactured. Since then, human beings have entered the era of mosquito incense.

　　Up to now, there seems to be no better universal method for mosquito repelling.

　　

　　Which kind of mosquito repellent method do you like?

　　However, human beings have not stopped their pace, in addition to the state and organizations, the individual contribution to mosquito control is not small, a variety of brain hole opening mosquito control methods are endless.

　　For example, the mosquito control efficiency as high as 50 to 100 per second "mosquito laser cannon" to understand?

　　This artifact is based on the principle of camera and optical detection. First, it emits a low-energy infrared detection laser to identify objects in front of it. This laser is pollution-free, harmless to humans and animals, but it can identify mosquitoes, and determine mosquito species and gender by size and frequency of wings. After confirming the target and ensuring that there are no obstacles in the middle, it will emit high-performance. The attacking lasers, within the range of 30 meters, hit 100 times, while mosquitoes flew ashes and smoke.

　　Other scientists have come up with the idea of "cutting off children and killing grandchildren". They cultivate male mosquitoes infected with Wolbachia bacteria that sterilize mosquitoes but have no effect on humans. In this way, the mosquito population will decline in a cliff-like manner, or even become extinct. However, any species is a part of the earth, and it is not clear what harm it will cause.

　　In addition, some mosquitoes are beneficial, such as large mosquitoes and giant mosquitoes. So instead of killing mosquitoes, find ways to control their numbers.

　　So what is the most reliable and practical mosquito repellent method for human beings at present? Or mosquito repellent water plus shelter.

　　Just last night, I was covered with dew and mosquito-killing pats in my hands while sleeping. I was still awakened by mosquito bites in the early morning. When I saw that the mosquito-repellent incense had not been extinguished, I knew that I had lost completely! No wonder the ancients said, "Xiado mosquitoes, poor, domestic debt as a guilt", the family is poor, even if it is to borrow money to buy mosquito nets. Until now, mosquito nets are still the most practical and common way to resist mosquitoes. Imagine, when we hide in the mosquito net, watching the mosquitoes hungry outside the net, hungry, hungry, is it a sense of freedom to live, have a smart pleasure?