Why flies dodge people s attacks 5

Mosquitoes and flies.

It's all creatures we hate. Both mosquitoes and flies can spread diseases. So should we eliminate them?

We actually have a way to get rid of them, but we can't get rid of all the mosquitoes and flies. Methods to eradicate them Mosquitoes and flies are numerous and widely distributed, and insecticides cannot completely eliminate them, so scientists.

Methods for their complete eradication were studied. For example, using"Genes**": The sterility gene is introduced into the male mosquito to make his offspring sterile, and as long as enough sterile male mosquitoes are made and released into nature, the mosquito population will decrease and decrease because it cannot produce the next generation.

<> all kinds of methods of eradicating them are expensive, reasonable prevention and control is undoubtedly the best way to eliminate them directly. Mosquitoes in the ecosystem.

In this way, mosquitoes have been decreasing and controlling the populations of other animals, including humans, for millions of years. As food for some animals, mosquitoes and their larvae are food for some species**, such as fish and birds. If mosquitoes are no longer present, these animals will have no primary food**, so their populations may decline or even die, causing a serious ripple effect.

So, what reason and ability does humanity have to allow these species to perish?

Human science and technology have advanced by leaps and bounds, and it doesn't matter much if they can eliminate flies and mosquitoes, because the so-called rapid progress is for human beings, and we feel that the rapid progress is for nature, and it is no different from human beings for 2,000 years! Therefore, the scientific and technological progress of mankind is obvious to all. To put it bluntly, species on Earth, such as the so-called mosquitoes and flies, are adapted to the natural environment.

Instead of adapting to the human environment, human beings are insignificant in the face of nature! So, we have to find a way for humanity to survive on Earth. It is often said that the nuclear ** of humanity.

Can destroy the earth dozens of times. This is a serious misreading, not dozens of times, but dozens of times. Even if all the human nuclei are detonated, nature will soon repair itself, and the species on Earth will soon flourish again, just without humans!

Because they are also an important link in the biological chain, they play a certain role in the natural cycle and ecological balance; They will destroy the ecological balance, they will eat corrupt items can promote the decomposition of garbage, and the effect of natural material circulation can contribute to the ecological balance.

Because mosquitoes and flies have a particularly strong reproductive ability, as long as their living environment does not destroy flies and mosquitoes will not perish, these two organisms have an important role in the ecosystem, are irreplaceable decomposers, and can control the populations of other organisms in a very wide range.

Because this insect can still regulate the temperature, it is useful, maintain the balance of the biological chain, provide food for other animals, and protect biodiversity, so they cannot be eliminated completely.

In ecosystems, it often plays the role of a decomposer, maintaining the cleanliness of nature. It corrodes and decomposes the substance, which greatly reduces the spread of harmful bacteria in the decaying substance. So that the organisms that die due to germs in the biological world are controlled within a certain range.

Mosquitoes and flies are very reproductive, and can play a role in balancing the ecology. It can also bring food to some small insects, and mosquitoes and flies can also play a role in protecting the environment. Avoid the growth of bacteria in some rotten meat.

Because this kind of insect is still enough to regulate the temperature and effectively connect the biological chain balance, its organisms provide food, and the biodiversity of the egg wings, so it will not be wiped out.

In the ecosystem, it often plays the role of a decomposer, and it is a link to the cleanliness of nature. For the corrosion and differentiation of materials, the level of transmission of harmful bacteria in decaying materials is greatly reduced. As a result, the creatures in the biological world that die due to germs will be controlled within a certain range.

Because flies fly from back to front when they take off, plus the flies' flying skills are relatively high, and the flies' eyes have very good eyesight. And the fly also has 5 eyes, so the ability to distinguish is very good.

Mainly because the eyes of flies are very sensitive, and their nervous system is relatively developed, so they can quickly dodge every slap.

Because flies are very fast, and flies have compound eyes, this complex case allows them to dodge quickly.

The fly's visual system reacts very quickly, 10 times faster than the human eye, or even faster. The fluorescent lamp flashes 60 times per second, which is simply imperceptible to the human eye, while flies can easily distinguish it. Keen vision allows flies to sense danger very quickly and avoid it, which is why it is so difficult for people to hit flies.

The fly owes such agility to its eyes. Strictly speaking, flies have only two eyes, but these two eyes are made up of a myriad of small eyes that can see very small objects. The fly's visual system reacts very quickly, 10 times faster than the human eye, or even faster.

The fluorescent lamp flashes 60 times per second, which is simply imperceptible to the human eye, while flies can easily distinguish it. Keen vision allows flies to sense danger very quickly and avoid it, which is why it is so difficult for people to hit flies.

The fly has a tiny organ balance rod on its body. It can adjust the direction of movement of the wings, it is a navigator for flies to maintain their body balance, and it is precisely connected to the eyes, and the sensitivity is self-evident. This unique physiology not only allows the fly to evade human pursuit, but also makes it more reflexive than other insects.

Therefore, there are many small holes in the fly swatter, which is to reduce the impact of the air on the fly when the fly swatter swatts towards the fly, so as not to cause the vigilance of the fly and run the fly away. Of course, it can also increase the speed of swinging the fly swatter.

For twenty years, Michael has been working on his research direction - the biological mechanism of insect flight

Dickinson has been interviewed several times. However, one question has always bothered him: Why is it still difficult to hit flies with a fly swatter?

California Institute of Technology

With the help of high-tech, high-speed digital imaging equipment, Dickinson and one of his graduate students jointly discovered the fruit fly (FRUIT).

fly) tips for escaping from a fly swatter. Before the flies flee, their tiny brains deduce the direction in which the threat is coming, generate an escape plan, and then adjust their legs to the optimal position to flee in the opposite direction of the threat. All of this happens within 100 microseconds of the fly seeing the fly swatter.

This is enough to illustrate how quickly the brain of the fruit fly converts visual information into appropriate action responses," dickinson

Pointed. For example, the footage shows that a fly swatter that descends from the air – a black disc 14 cm in diameter to be exact, and smashes it at a 50-degree angle towards the platform** – the fly moves its middle leg forward, leans back, and flies backwards with both legs as support. When the threat** is behind (the visual area of the fruit fly is close to the 360 range, so the threat from the rear can be seen. , the flies will move the middle leg back. Similarly, when threatening to the side, the leg between them will remain motionless and the body will tilt in the opposite direction before jumping.

We also found that when flies notice a threat and make a pre-takeoff exercise plan, they take the position of their body into account," Dickinson notes: "The fly's body may be in any position at the moment of detection of the threat, depending on what they are doing: grooming, eating, or walking."

Our experiments show that smart flies understand that they should make large or small postural changes accordingly to achieve the correct pre-takeoff posture. This means that the flies must integrate visual information (the direction in which the threat is coming) with mechanosensory information in the legs (how to achieve an appropriate pre-takeoff posture). ”

These findings could give us a deeper understanding of the nervous system of Drosophila and tell us that there may be rigorous planning in the Drosophila brain to "translate the threat into an appropriate pre-takeoff posture," Dickinson said: "It's a very complex mechanism of sensory-motor transformation, and our task is to find out the areas in the brain where this transformation occurs." ”

Dickinson's research also gives us the best way to fight flies. "It's best not to hit where the fly originally landed, but to hit a little forward, because the fly will fly in the opposite direction once it sees your fly swatter," Dickinson advises.

The reaction speed of flies is very fast, so it is usually impossible for us to swatt the flies to death in one fell swoop, which is the main reason why the flies are difficult to eliminate.

Expelled flies. 1. Put some chopped green onions, shallots, and garlic in the kitchen.

2. Lighting dried orange peel indoors can not only repel flies, but also eliminate odors.

3. Spraying vinegar indoors can keep flies away.

4. Indoor potted tomatoes can repel flies.

5. Flies hate blue, so you can replace door curtains, screens, etc. with blue ones.

6. There are many flies in summer, and if you don't pay attention to the washed food, it will be bitten by flies and contaminate the food.

Eliminate flies 1, you can use a fly swatter to catch a fly cage.

2. The more suitable method is to use sticky fly paper or mix 2% trichlorfon in sugared rice or stinky fish and rotten vegetables to trap and kill. Keep it moist to enhance the toxic effect, but do not directly expose it to the sun or rain.

3. It can also be sprayed directly with trichlorfon or fly poison phosphorus.

4. In summer, when using the electric fan for ventilation, you can add a few trouser branches to the electric fan blades to drip wind oil, which can also effectively kill flies.