However, the locust plague is still the most terrible "disaster" in history. Before the plague of locusts, droughts often occurred ("great drought breeds locusts" and "long drought breeds locusts"), and the plague of locusts occurred for several years until the locusts ate all the things they could eat, and then the locusts suddenly fell sharply due to lack of food, and the plague of locusts ended.

Grasshoppers are basically harmless as long as they don't flock together, but once the number increases and they move forward collectively, they will become very "terrible" (this is by no means irresistible to human beings)

But in fact, the locust plague can be prevented, because there will be a "great drought" or a "long drought" before the locust plague, and the spawning area of the locust plague can also be inferred, so it is the best policy to eliminate locust larvae as soon as possible (before the third instar, locust larvae are generally divided into five or six instars)

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Once locusts swarm, it is extremely difficult to deal with them. Now we can use airplanes to spray pesticides to fight the plague of locusts. Obviously, this is an extremely bad choice. It is very effective to rely on the natural enemies of locusts to eliminate locusts before the formation of locust plague, but the effect on locust plague can be said to be minimal. Therefore, it is very important to control the locust plague before it forms, that is, to kill the locust larvae (before the third instar).

Locusts can be eaten, but the plague of locusts is so terrible that people dare not avoid it. Even if some locusts were picked up and eaten in the past, compared with the losses caused by the locust plague, it was only nine Niu Yi hairs, which could be ignored.

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The plague of locusts is very terrible. Once it breaks out frequently, the population will be greatly reduced, even lasting for several years, until all human food is squeezed out.

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Until today, mankind still can't really solve the problem of "locust plague", and Guo Jia still turns to international aid because of the locust plague.

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The locust plague is really terrible, but it is not so much a natural disaster as a "man-made disaster". Unlike earthquakes, floods, droughts and natural fires, locust plagues can be prevented, and human beings have accumulated knowledge in this field for thousands of years.

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Locusts are edible and delicious, but I don't want to encounter locust plague in my life.