Location: Asia, Africa, Oceania and parts of Europe.

Disaster: Tens of thousands of hectares of crops were destroyed. Locust disaster and drought and flood are called "three major disasters" in agricultural production.

Almost all countries in the world have suffered from locusts. The plague of locusts not only caused great harm to agricultural production, but also caused many famines, diseases and even social unrest. Therefore, locust plague has always been one of the great threats to agricultural production in all countries of the world.

Locust belongs to ORTHOPTERA, Insecta and Acridoidea. Locusts are about 5 ~ 1 1 cm long, generally green or yellowish brown, chewing mouthparts and having large hind feet, which are suitable for jumping. There are many kinds of grasshoppers, about 1 10,000 in the world, and there are more than 300 kinds in China alone. Locusts are widely distributed, and their footprints can be seen in almost every corner of the world, but they are most common in Southeast Asia and Africa.

Whenever a plague of locusts breaks out, a large number of locusts gather and flood in, and crops are looted in the blink of an eye, leaving a desolate scene. They not only eat crops, but also eat sheep's hair, straw roofs and even the wooden handles of sweaty farm tools when they can't find crops. If they can't even eat these things, they will soon be divided internally and specialize in eating weak people. This shows their greed and cruelty. In addition, the reproductive ability of locusts is extremely amazing, and the number of each new generation increases by 10 times, and its flight speed can not be underestimated. The average flight speed is about 4000 meters per hour, and it can fly continuously for dozens of hours. So the harm of locusts is creepy. 188 1 year, the Mediterranean island of Cyprus suffered the most serious locust plague. Locusts came all the way from North Africa, causing great damage to crops and destroying tens of thousands of hectares of crops. During the period of 1889, locust swarms appeared over the Red Sea, and the number of locusts was about 250 billion. As soon as the locust flies, its voice vibrates for miles, covering the sky and the sun. 1979, the farmland and pasture in the west of Missouri River 14 states in the United States were all covered by locusts, which caused very heavy economic losses. During the period of 1988, Senegal and Mauritania in Africa suffered from locust plague, which was rare for decades. Only one swarm of locusts could reach 1000 billion.

Grasshoppers that eat crops.