Why were there locust plagues after the ancient drought?

When you watch some historical TV series or books, you should often see that after every large-scale drought in ancient times, the earth was basically barren, with no animals and plants, only swarms of locusts were dark. In other words, every time there is a drought, there will be a plague of locusts. In ancient times, people thought it was the punishment of the gods for human beings, but did not explore the reasons. Today, we will talk about why there will be a large-scale locust plague after every drought.

The first point is that after each large-scale drought, locusts are more likely to survive and reproduce. Due to the sharp drop of water resources, a large number of plants with low water demand have been preserved, and locusts need these plants to lay eggs most. In addition, the natural enemies of locusts, such as frogs, are greatly reduced, making it easier for locusts to survive and reproduce. According to statistics, when the locust plague occurred, the number of locust eggs contained in one cubic meter of land actually reached hundreds of thousands, which was shocking.

In addition, locusts are very good at migrating to other places. We know that it is a kind of flying insect, so they can often fly from northwest to north China in pursuit of food in a quarter of the time, and wherever they go, they often get nothing. They often like to breed their next generation in that semi-desolate place. In fact, the decrease of locust plague in our country is also related to the intensification of land desertification in northwest China, because locusts are not easy to breed the next generation. There is also a little story. The well-known poem "Dark clouds crush the city to destroy" is not only used to describe a large number of human battles, but also to describe the sight of locusts approaching a city.

The third reason is that everyone in the old society was superstitious. Everyone thought that there were so many locusts because human beings made mistakes, so God sent locusts to eat up human food. At this time, people don't think it is a pest, but treat it as a god. As the king of a country at that time, he had to bathe all over before he could go to the altar to apologize with pure body and mind. Then when the locusts are crawling all over, they are the most sacrificed, which can be said to be very stupid. However, the ancients did not think about the actual reasons, but blindly believed in practice and missed the scientific method of controlling locusts.

Finally, electricity is the most fundamental reason, that is, from the perspective of ecological balance Because locusts belong to low-level insects, it is relatively simple for them to eat as long as they absorb water from nature. And after every large-scale drought, other animals and plants that need water die. In addition, many creatures that feed on them are gradually decreasing. This led to the ecological destruction of nature, and locust plagues occurred everywhere. This is most obvious in the northwest of China.

Conclusion:

The plague of locusts is a great harm to people's future production activities. We should know its causes more clearly and take effective measures.

Prevention and control methods of locust plague:

1. Locusts must lay eggs on land with vegetation coverage below 50%. If a place is beautiful and there is no bare land, locusts cannot reproduce. Therefore, we must attach great importance to the protection of the ecological environment in order to fundamentally prevent and control the locust plague.

2. At present, the most effective way to kill locusts is to spray pesticides by plane. This method has high killing rate and wide killing range, but the cost is high. Moreover, chemical control can only meet temporary needs and cannot guarantee long-term stability.

3. In the long run, in order to effectively control the locust plague, we must focus on ecological construction and implement the four combinations of plant protection, biological protection, resource protection and environmental protection. In particular, it is necessary to ensure biodiversity and protect natural enemies of locusts.