Reasons for cicada sloughing:
Cicada's life goes through three stages: fertilized egg, larva and adult. In the larval stage, every molting will make the shell grow a little bigger. Larvae need molting to become adults.
The process of cicada molting:
Cicada larvae usually stay in the soil for several years or even more than ten years, such as three years, five years, and there will be 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. Molting is controlled by hormones. The front legs of the cicada pupa are hooked, so that when the adult comes out of the empty shell, it can be firmly hung on the tree.
It is very important that the cicada pupa must face the tree vertically. This is for the normal development of adult wings, otherwise the wings will be deformed. Cicada, based on the pupa shell, slowly releases itself, just like climbing out of a pair of armor. The whole process takes about an hour. When the cicada's upper body is free, it spreads its wings upside down.
At this stage, cicadas' wings are very soft, and they spread them through body fluids. The body fluid tube spreads its wings by the pressure of liquid. When the liquid is pumped back into the cicada, the spread wings have become hard. If the cicada is disturbed in the process of spreading its wings, it will be disabled for life, and may not be able to fly or make a sound at all.
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. In late July, female adults began to lay eggs, and the peak of laying eggs was in early and middle August, and most eggs were laid on branches with a thickness of 4 ~ 5 mm.
Extended data:
The economic value of cicada;
1, cicada slough: cicada is also called cicada, and both cicada slough and male cicada can be used as medicine. Cicada, whose skin is called cicada slough, is rich in chitin, isoflavone pterin, pterin and adenosine triphosphatase, and is often used to treat cough caused by exogenous wind and heat and hoarseness. Sore throat. Rubella itching, conjunctival congestion, tetanus, infantile convulsion, night crying, etc.
According to China Pharmacology, it also helps to strengthen yang, relieve cough and promote fluid production, protect lung and kidney, resist bacteria and reduce blood pressure, treat baldness and inhibit diseases.
2, cicada larvae: cicada is cold and delicious, which has the effect of dispersing wind and dispersing lung, relieving fever and relieving shock. Cicada is nutritious and delicious, and has become a fashionable delicacy. It can be fried before the larvae become cicadas, or it can be pickled with edible salt and then fried. Cicada is rich in nutrition, with a dry protein content of over 70% and a fat content of about 7%, and its vitamins and various beneficial trace elements are higher than those of ordinary meat food.
Can be called the king of protein in today's food. The newly unearthed mature larvae are rich in nutrition, with protein content of 58-58% and fat content of 10-32%. In recent years, cicadas have been put on the table. As a health food, the market demand is increasing and the price is getting higher and higher. Wild resources alone can no longer meet the needs, so artificial breeding began today. People concerned believe that cicadas will become one of the important green foods for human beings.
Baidu Encyclopedia-Cicada (Hemiptera Cicadellidae)