What are the causes of locust plagues and the causes of locust plagues

1. Causes of drought: From an environmental point of view, one of the main causes of locust plagues is caused by drought. Because in an arid environment, locusts.

The growth, reproduction and survival of insects are very favorable. When locusts lay eggs, they generally lay their eggs in the soil, which is solid and contains water.

Around 15% of the cases, it is the most suitable environment for locusts to lay eggs. In times of drought, when the water level drops, locusts grow quickly and multiply, and the water content drops.

Fall. In addition, the amount of vegetation on the ground is very small, which leads to a large increase in the number of eggs laid by locusts, which in turn leads to locust infestations.

2. Living habits: The living habits of locusts are actually a major factor leading to locust infestations. Because locusts generally live in groups, if they are not controlled in time, they are very easy to become plagues.

Locusts are also very capable of reproducing, and in a suitable environment, their reproduction can be very frightening.

Fear. And locusts have a very mixed feeding habits and are able to feed on a variety of plants. Moreover, when locusts lay eggs, they will hide their eggs in deep ground, which is difficult.

was destroyed. In addition, the flying ability of locusts is also very strong, and it will be difficult to control it.

3. Climate warming: Climate warming is also easy to lead to locust infestations, especially in winter, when the temperature rises, and the increase in locust overwintering eggs is.

Very advantageous. In addition, various factors such as drought and grassland degradation can create a suitable environment for locusts to lay eggs. And the adaptation of locusts.

It is very capable of surviving in an environment where many other insects and birds cannot survive. It also inhibits a filamentous form that causes locust disease.

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.

The main reason for the occurrence of the yellow plague is because of the drought, there is very little rain, and locusts will be overflowing.

One of the main reasons why locusts are so easy to infest is that they are very reproductive. Locusts reproduce every three weeks, and it is estimated that each female can lay about 100 eggs, and as many as 300,000 eggs may be present in each square meter of soil, which are not easily destroyed in the ground.

Therefore, as long as the conditions are right, locusts can multiply on a large scale, and the population will increase rapidly. When they fly, they will eat, and locust plagues will appear.

The occurrence of locust plagues is linked to climate change, especially drought. As the old saying goes, "Locusts rise when there is a drought".

The drier environment is more favorable for locusts to multiply, and drought can also force locustsMass migration, gathering

In addition to being very reproductive, locusts are not picky eaters and a variety of plants, including crops, are their food**. And the locusts are very capable of flying, they can fly for hours on end, and the flight range can reach up to 150 kilometers. In just a week, the locusts can fly up to 1,000 kilometers away.

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.