How can the occurrence of locust plagues be effectively controlled?

The most effective way to do this is through afforestation. As long as the vegetation coverage of an area reaches more than 50%, locust plagues are difficult to occur in the area.

At present, the most effective way to deal with locust plagues is to use aircraft to spray pesticides, which is extremely efficient in killing insects.

1. Spray pesticides to kill locusts.

Compared with other methods, the choice of using airplanes to spray pesticides and destroy locusts is the most effective. Because this method has extremely high insecticidal efficiency, the scope of extermination is relatively wide, and it can cover a large area of locust-infested areas, and the pesticide is a pesticide specially targeted at locusts that has been studied by scientists, so the insecticidal efficiency will be relatively high. However, the disadvantages of this approach are also very prominent, that is, the cost is relatively high, and not everyone can adopt this method, which can only be adopted by the state to organize.

Second, the use of natural enemies to prevent and control.

Compared with the use of chemical ** to control locusts, there is also a way to use natural enemies to control locusts, which is more healthy and efficient, and will not cause too much damage to the ecological environment. For example, when there was a locust plague in Inner Mongolia, China sent a large number of ducks to Inner Mongolia to exterminate locusts. The advantages of this approach are obvious: there is no need to buy a lot of pesticides, there is no need to worry about the damage caused by chemicals to the land, and the speed of locust extermination is quite fast.

The disadvantage is also more prominent, that is, ducks do not necessarily eat only locusts, and may also damage some surrounding crops.

3. Environmental protection.

There are many ways to control locusts, each method must take into account the biogeographic environment, there is no most effective method, only through the environment and the type of insect control to choose the management method, although our country has been suffering from locust plague this major natural disaster since ancient times, but our country has 68 kinds of natural enemies of locusts, such as chickens and ducks, birds and poultry and other creatures are the natural enemies of locusts, in modern times I control locusts is simpler, through pesticide spraying and scientific effective control, can greatly reduce the occurrence of locust plague.

You can choose to raise more ducks and chickens in the field to destroy locusts, you can choose to use insecticidal agents to spray to exterminate, locusts can choose to increase the amount of fertilizer, and you can choose to catch them on a large scale to make food.

(1) Establish an early warning system for locust plagues, and keep abreast of and grasp relevant information about the situation in areas where locust plagues occur;

2) Use the biological locust extermination method to raise chickens and other poultry in the grassland locust plague areas to exterminate locusts, and can also use construction waste to pile up into bird nests on the grassland to attract birds to breed and exterminate locusts;

3) Develop and use high-efficiency and low-toxicity pesticides to kill locusts.

Under such strict management, a locust extermination brigade, a locust extermination squadron, a locust extermination detachment, and a locust extermination team were divided. Basically, everyone has a management area, and if something goes wrong, the person in charge can be found.

To put it bluntly, it still depends on people. It is precisely this tactic of crowding people that has solved the problem of locust plague to a certain extent. But there are always areas that can't be taken care of, and locusts can make a comeback from time to time.

Finally, around 1955, the slogan of prevention over governance was put forward again. In fact, locust plagues have always been like this, and once they are formed, manpower cannot control them at all. By the time it was controlled, it had already caused considerable damage.

How to prevent it? The focus is on finding eggs, larvae, and adults. Once the clues are found, they will be reported immediately, and the previous policy of hitting early, small, and hitting will also be followed.

Later, a slogan was formed - it is better to catch locusts than to catch flies, and it is better to dig eggs than to catch locusts. The so-called catching locusts is to catch adult insects, and the locusts can be understood as larvae, and the eggs are eggs. Of course, in the process of governance, we have also taken a lot of detours.

In recent years, as an edible insect, locusts still have a certain breeding area in China. However, wild locusts are a pest, and locusts feed on various crops, which seriously affects the growth and yield of crops. In particular, locusts are very easy to form locust plagues because of their ability to reproduce and adapt strongly, which seriously affects economic benefits.

So how can we prevent locust plagues?

1. Ecological governance. To prevent the occurrence of locust plagues, we must first focus on the physiological characteristics of locusts. Locusts are controlled by improving the plant varieties and environment of the locust producing areas.

For example, locusts feed on food crops such as corn, wheat and rice, rather than alfalfa and fruit trees. So we can plant crops that locusts don't eat in locust plagues. For some low-lying places, they can be converted into fish ponds to reduce the living conditions of locusts.

Then increasing the vegetation cover of the area so that the locusts cannot lay eggs can also effectively reduce the locust infestation.

2. Biological control. Biological control will not affect the environment, and it can also ensure harmlessness to the health of humans and animals. In addition, it is simple and the input cost is relatively small, and the use of biological control is also the main way to control locusts.

We can use biological pesticides to control locusts, and now the more mature is locust microsporidia control technology. Locusts can develop a form of microsporidiasis after eating food containing microsporidiasis until they die. The disease is an epidemic by using food contamination to kill locusts and laying eggs containing microsporidia to spread among locust swarms.

After a single control, the disease can be endemic in locust swarms for many years.

3. Chemical substances. There have been professional data studies that have shown that one of the main factors in locust swarm movement is caused by a serotonin substance. So we can use this substance to control the development of locust swarms.

However, in the long term, pest control methods will not be completely innovative. This is because the chemicals used to neutralize serotonin are also capable of designing sheaths that can penetrate the locust's epidermis. And this chemical needs to be used only when locusts are alone.

The prevention of locust plagues should focus on sustainable development. In order to kill locusts as soon as possible, many people will choose chemical pesticides for control, but this is only an emergency method and cannot be used for a long time. Therefore, this will not only kill the locusts quickly, but also eliminate the natural enemies of the locusts, which is also very detrimental to the growth of crops.

Therefore, when we control locusts, we should pay attention to ecological management and biological control. It is necessary to choose simple, economical, and effective methods according to the actual situation to ensure the long-term development of agriculture.

Throughout history, the cost of each locust plague has been very heavy. This year, the number of Asian locusts in Africa and even in Eastern Europe has reached 100 billion, and it can be said that there is no grass everywhere they go, resulting in a great reduction in grain production and extremely threatening people's normal life. The locust plague has been paid attention to in all dynasties, because the people take food as their sky, which is related to the most fundamental survival problem.

As long as it is not controlled, there will be a lot of hunger problems.

First, the locust swarm is very large. Due to the high reproduction rate of locusts and the speed of movement, as soon as they appear, they will be like the wind passing through the sky, and if effective measures are not taken, it will trigger a large number of chain reactions. After they are gathered, they have the ability to gnaw without any grass.

They mutate quickly, newborn, solitary, mild, and ashamed. But once there are more than 60 of them, the color changes and the personality changes. He became particularly irritable, aggressive, and had a great appetite, and began to march in groups.

After the encounter, they merge from time to time, and the group will get bigger and bigger.

Second, the harm is huge. Desert locusts and flying locusts are the most important agricultural pests and the most extinction of migratory pests.

Third, in-depth historical experience. It has been recorded in all Chinese dynasties that in the summer of 2002, more than 100 counties in 13 provinces, autonomous regions and municipalities, including Hebei and Xinjiang, were plagued by locust plagues in different ways, and 90 million mu of agricultural and pastoral areas were affected, resulting in great losses. Today, it is mainly locusts that have migrated from abroad.

Fourth, the risk of desert locust swarms invading China remains. Locusts will eat our crops and all green will be swept away, so we need to be prepared for the arrival of locusts and come up with a way to stop the locust plague. In nature, the food chain adheres to a state of relative harmony, and the ecological environment can be guaranteed and optimized.

Species extinction or endangerment affect biological chains and thus ecosystems; And the disaster of certain organisms will definitely destroy the biological chain and ecosystem.

The problem of locusts must be paid attention to, although the current science and technology are thriving, but the environmental problems are intensifying, especially the chain effect caused by climate warming, many viruses that have been silent for hundreds of millions of years are eager to try, many animals and plants have evolved from time to time to adapt to the environment, and have surpassed the original understanding of human beings, locusts are only the tip of the iceberg, and they must be paid attention to.

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Analysis: It has long been noted that severe locust plagues often go hand in hand with severe droughts. There is a record of "locusts in the drought" in ancient books in China.

Several major locust plagues in Africa in recent years have also been linked to severe droughts in the region. The main reason for this phenomenon is that locusts are warm, dry insects that prefer to breed and survive, and that arid environments have many benefits for their reproduction, growth and survival. Because locusts lay their eggs in the soil, which is relatively firm, a water content of 10 to 20 percent is best for them to lay eggs.

Drought causes locusts to multiply and grow rapidly, causing disasters in two ways. On the one hand, in dry years, the number of eggs laid by locusts increases dramatically, sometimes up to 4,000 to 5,000 eggs per square metre of soil, with 50,800 eggs per mass, or 200,400,000 eggs per square metre. At the same time, in dry years, the water surface of rivers and lakes shrinks, and low-lying land** also provides more suitable places for locusts to lay eggs.

On the other hand, plants grown in arid environments have a lower water content, and locusts feed on them, growing faster and having higher fertility.

On the contrary, rainy and humid conditions have many adverse effects on locust reproduction. The high water content of the plants that the locusts feed on will delay the growth of locusts and reduce their fertility, and the rainy and humid environment will also make locust epidemics, and rain and snow can directly kill locust eggs. In addition, the increase in natural predators such as frogs will also increase the mortality rate of locusts.

1. Drought. From an environmental point of view, locust plagues are mainly caused by drought, and the main reason for this phenomenon is that arid conditions have many benefits for locust reproduction, growth and survival. Because locusts lay their eggs in the soil.

The soil is relatively firm, and a moisture content of 10 to 20 percent is best for them to spawn.

2. Climate warming. Global warming, especially the increase in winter temperatures, is conducive to the increase of locust overwintering eggs, providing "eggs" for the outbreak of locusts in the following year. In addition, the combination of climate warming, increased drought, grassland degradation and other factors will provide suitable breeding grounds for locusts to lay eggs, and locusts have a strong ability to adapt to drought, because other insects and birds cannot survive in this situation, and a filamentous fungus that can cause locust disease is suppressed, so its number has increased significantly. Therefore, with the trend of global warming, the scale of locust plagues will become larger and larger in the future, which will have a serious impact on food production in China and the world.

3. The insect density is too large. In a 2006 study published in the journal Science, scientists proved that excessive locust density is also an important factor in locust infestations. When the locust swarm is at this density, the locusts will line up and start moving in the same direction.

Locusts are isolated, wingless "nymphs" early in their life history that tend to avoid each other. But if resources become scarce, they are forced to influence each other. They can then form orderly swarms of native locusts.

This locust swarm has the ability to move in unison, enter the habitat of the neighbors, and allow more and more locusts to join in, eventually becoming a huge locust swarm. Therefore, the beginning of group action is crucial to control the locust outbreak. The group of scientists placed the growing swarms of locusts in a circular field, recorded their behavior, and tracked their movements with computer software.

At moderate densities (25 to 62 locusts per square meter), the locusts line up in rows and begin to move in the same direction, or even change direction abruptly in unison.

In the experiment, when the number of locusts per square meter exceeded 74, the orderly advancing locust swarm stopped changing direction and continued to advance in the same direction for 8 hours. These observations confirm what was expected by a computer model known as the self-propelled particle model. Buhl and his colleagues believe that using such a model could help devise ways to control locust outbreaks.

Their findings also support the FAO's definition of locust nymph populations. At this defined density, locust swarms tend to cross the "tipping point" and thus trigger a locust infestation.