The king of insects is a locust that ravaged half the earth not long ago. Grasshoppers generally belong to facultative diapause insects, and most of them overwinter with eggs in oocysts in the soil. Only a few species such as Japanese yellow-ridged locust and short-legged spotted locust overwinter as adults.

The number of generations of 1 year extended data depends on the biological characteristics of species, annual effective accumulated temperature, food, light and the growth and development of various insect states in different regions. For example, the Asian migratory locust has 1 generation in China. The distribution of Locusta migratoria manilensis in the middle and lower reaches of the Yangtze River and its north in China is 2 generations, while the high temperature and drought years in the Yangtze River and Huaihe River basins are 3 generations or incomplete 3 generations. 4 ~ 5 generations in South China. There are 1 generation in the Yangtze River and its north, and 2 generations in the south of the Yangtze River.

Locusts have two characteristics, one is that they can eat. People call it a hunger bug, and Ouyang Xiu describes it as a sharp knife in his mouth. He is often suspicious of hunger when he is dissatisfied with the poisonous intestines. In other words, it is not enough to eat fast. Second, it can fly. It can fly thousands of miles in one breath and cross rivers and seas. Xiang Liu meets these two requirements. Xiang Liu has nine heads, is insatiable, likes to bite, and flies farther than Dapeng. Locusts have huge bellies except their heads, and gluttony is almost catching up with gluttony.