Cicada is a pest, because cicada larvae hide under the soil, feed on the juice of plant roots, and insert ovipositors into the xylem of young trees to lay eggs, while adults feed on the juice and pulp.

Efficacy and function of cicada:

It can dispel wind, clear away heat, calm the liver and relieve spasm. When wind-heat or heat toxin is exogenous, it is easy to turn heat into fire, and there may be convulsions. Cicada can dispel wind and clear heat, calm the liver and relieve spasm, and some other medicinal materials can cope with this situation. It can dispel wind, relieve exterior syndrome, relieve sore throat and relieve cough

Feel cold, turn into heat, or feel the evil of wind and heat, which leads to stagnation of lung and Wei, resulting in dry throat and itchy throat and frequent coughing. In this case, cicadas can be used to dispel wind and relieve exterior symptoms, and cough will stop when throat wind is removed.

Extended information:

The principle of cicada's vocalization:

The cicada that can sing is a male cicada. Its vocal organ is at the base of the abdomen, like a drum covered with an eardrum. The eardrum vibrates and produces sound. Because the vocal muscles can expand and contract about 11,111 times per second, the gap between the cover plate and the eardrum can play the role of * * *, so its vocalization is particularly loud. And can take turns to sing in a variety of different tones. The female cicada is a "dumb cicada" because her musical instrument structure is incomplete and she can't make sound.

Distribution range of cicada:

It is distributed in temperate and tropical regions, inhabiting deserts, grasslands and forests. There are periodic cicadas in addition to the species of the genus Lepidoptera, which appears in midsummer every year. The most famous periodic cicadas are 17-year cicadas and 13-year cicadas, also known as prime cicadas. Because the life cycle is prime, they will not meet the natural enemies they met in the previous generation.

Baidu Encyclopedia-Cicada