Cicada larvae live in the soil and suck the juice from the roots of plants with mouthparts, which weakens the tree potential, makes the branches die and affects the growth of trees. Usually I will stay in the soil for several years or even more than ten years, such as three years, five years, and 17 years. These numbers have one thing in common, they are all prime numbers. When it is about to emerge, drill out of the ground at dusk and night, climb to the tree, and then grab the bark to shed its skin and emerge.

When a black crack appears on the back of the cicada pupa, the molting process begins. The head came out first, and then the green body and wrinkled wings were revealed. Stop for a minute with hardened wings and deepened colors, and start to take off. The whole process takes about an hour. At the end of June, the larvae began to emerge as adults, and the newly emerged cicadas were green, and their longest life span was about 60 ~ 70 days.

Extended data

Growth and reproduction of cicadas;

From June to July every year, pupae will become adults in just a few days, and then lay eggs. From the beginning of eggs to the process of nymphs living underground, until the last time they shell and become adults, they will make a scene in the trees. This period usually takes one to two years. Among them, in cicadas, their larvae are also called "nymphs", and their males make sounds to attract females to mate with them.

In the long life, they have to go through many times of shelling, and the first time after shelling, they will become an adult. When it becomes an adult, it will make a sound, and the sound made by the male cicada will constantly vibrate the two eardrums in the abdomen at a high frequency of hundreds of times per second, making a sharp and loud sound. This sound helps the female cicada locate the male cicada suitable for mating.

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