mentions the creatures that people hate the most. Flies, mosquitoes and cockroaches are that will definitely be on the list. Most people hate them deeply, and they will definitely be slapped to death if they have the chance. Of course, this is useless because there are too many of them, and there will be thousands of them to make up for one.
Almost everyone hates flies, mosquitoes and cockroaches
For this reason, some people suggest that scientists should develop a way to kill flies, mosquitoes, etc., but scientists said that this is not appropriate, because is because flies actually has an irreplaceable role .
So, what is the use of flies on the earth? If it is considered extinct, will there be any serious consequences?
"Hateful" fly
Most flies Although they do not suck blood like mosquitoes, , but their hatefulness is comparable to mosquitoes, , because this guy will also buzz in your ears while you sleep. Of course, the fly may say that in his only one month of life, it wants to try hard to shine its presence.
Flies are the general name of flies . Speaking of its name, there are some considerations. In ancient times, flies already existed in . People think this guy "is good at tying a rope with his front foot", so he married half of the word "rope" and named it, which really seems to fit it.
Fly's body structure diagram
mentions common flies. Most people are impressed by them. The green-headed flies . . In fact, there are many species of flies under Diptera . They can be divided into , Drosophila , 文典子 , etc. . According to current statistics, there are at least 60,000 members of the fly family.
As mentioned earlier, flies do not live long. As a completely perverted insect, can only become adult after multiple stages of egg, larvae, prepupa, and pupa. After adulthood, can only live in for one month .
Fly growth process diagram
However, short life is not a problem for flies, because they will reproduce wildly for a limited time. As long as there is a mating, can finally produce eggs .
In a short life, female flies can lay eggs 5 to 6 times, and the number of eggs is about 150. Someone once made this estimate that a bunch of flies in can reproduce more than 75,000 offspring in about 3 months. In this case, we were far from catching up with their breeding.
"A small mosquito-killing swatter can't kill our big family~"
So, why are people so tired of flies?
In fact, the hateful thing about flies is that they can spread bacteria , because this guy is an omnivorous creature. Some species of eat plant juice or nectar, while others eat excrement, garbage, etc. . "Flies do not bite seamless eggs" is probably the most appropriate description.
Problem When it feeds on excrement and garbage, it will crawl on our food, which undoubtedly brings all the bacteria over.
Schematic diagram of the fecal oral transmission pathway of bacteria
In addition, the "eating habits" of flies are also conducive to the spread of bacteria, because this guy likes to use crop liquid to dissolve food first, and then vomit while eating while eating, and then pull while eating.
This habit is really unacceptable, but flies are used to it. 's habit of "eating while spitting while pulling" helps it to timely excrete bacteria that are not conducive to its own and can consume more food.
flies spread bacteria through reflux, exoskeleton and defecation
In this case, There are more than 56 million bacteria on the surface of a fly, and the bacteria in its intestines are even more terrifying. Conservatively, there are about 528 million .
This makes flies a "middleman" for virus transmission , such as cholera , tuberculosis , etc., it can spread. In addition, Africa is suffering from poor sanitation conditions, and the famous "sleeping disease" threatens the lives of many people.
data shows that sleeping disease threatens more than 60 million residents and more than 50 million livestock in 37 African countries. More than 500,000 people are infected with the disease every year, of which 80% die due to loss of immunity, and the economic losses are as high as US$4.5 billion.
Bacteria in the digestive tract of adult houseflies
Of course, it is not only people who hate flies, but other creatures are also tired of this guy, because this guy lays eggs on animals and even lets eggs enter the animal's body to reproduce . Taking pig farms as an example, flies are often regarded as the main force in spreading swine fever , the most important thing is that they are unable to defend against it.
To sum up, these are the hateful things about flies. So since they bring so many harms, why don’t we kill them at once?
flies will lay eggs on wounds of animal fur
flies have also made great contributions to
In the above article, we mentioned that there are many members of the fly family. In addition to those mercerated green fly , mercerated fly , toilet fly, etc., actually has some good flies .
Not only do these flies rarely hang out in places where humans are, also plays a role in spreading pollen, and sometimes eats some larvae of harmful insects , which has made a huge contribution to ecological prosperity.
For example, the reason why red fire ant , which has troubled many countries in recent years, has not been so good in its hometown in South America because it has its natural enemies there. Whether it is the parasitic flea or fruit fly , it will suppress the red fire ant population . Therefore, when the United States was helpless, it introduced these flies from Brazilian and Argentina , relying on them to suppress the arrogance of the red fire ants.
Drug flies will parasitic in red fire ant lay eggs
To be detailed, the contribution of flies can be divided into the following several, First is that they are an important link in food chain . You should know that in daily life, except for people slapping flies, many creatures feed on flies, such as toads, dragonflies and many birds. Even some plants, such as , Venus flytrap, , like to eat flies.
In other words, flies can be regarded as an important "food reserve" in the food chain, and their existence feeds many organisms . In this case, if we take action to exterminate it artificially, many creatures will face a situation where they have no food to eat and embark on the road to extinction. And the linked food chain, will inevitably collapse completely due to this impact.
Food chain is interlocking and indispensable
The second point is the existence of beneficial fly . In addition to the flies mentioned above that help eliminate red fire ants, such as hoverfly , hijacked fly , etc., are the natural enemies of some pests. Although they fly around in the orchard, they are indeed not eating fruits, is "eliminating harm for the people" .
Not to mention, some flies who like to suck nectar, like bees and butterflies, has the function of transmitting pollen , which means that their contribution to the ecology is unimaginable.
Not all flies are keen on eating garbage
The third point is that although some flies are particularly not clean, they like to visit wherever is dirty, messy and smelly. On the surface, this situation does spread bacteria, but in fact, in the process, the flies also act as an important decompositioner of . Without them, the "cleanness" of nature may be much worse than it is now.
data shows that scientists use the sensitivity of flies to pesticides, that is, the degree of lethality after contact and detection of vegetables to judge the toxicity of vegetable foods.Some people used flies to measure poison for newly renovated rooms and found that in new homes with high harmful gas concentrations, the average lifespan of 800 fruit flies was shortened by half after only 25 days.
Flies' decomposition of excrement reduces the spread of disease
To sum up, flies have made a lot of contributions, , but we often look at it with the stereotype , and naturally classify it as a pest . The reason why
cannot eliminate flies at once is because they play a key role in ecology and food chain . We cannot always affect the entire ecosystem because of our preferences.
Humans should not easily kill a certain creature
It is worth mentioning that in fact, flies have provided a lot of help to humans over the years, and even made great contributions to science. What's going on?
"Scientific Contributions" of flies
Everyone knows that when humans conduct scientific experiments, they often need to use many experimental products. Among them, the more common ones include mice, rabbits, etc. , but in fact, sterile flies is also an important experimental object .
has made considerable contributions since flies entered the scientific community, because many Nobel Prize are related to it .
flies have made little known to science and technology. For example, American geneticist Morgan used fruit flies in the early last century to conduct experimental research on genetics , and even established a special laboratory for fruit flies. In the end, he successfully won the Nobel Prize for the achievement of "The Role of Drosophila in Genetics".
Later, geneticist Mueller also successfully induced mutagenesis of fruit fly by using X-She Xiu'ang, proving the existence of mutant cell genetics , and won the Nobel Prize. In addition, there are many scientific contributions from flies, so I won’t list them one by one.
Hermann Joseph Muller is checking fruit fly
Overall, while some aspects of the fly are indeed disgusting, in essence, they are also very functional . Therefore, people still cannot kill all flies at once. As humans who exist as "general parents" in nature, they should give flies more tolerance.
