The reason why cicadas crawl out of the soil is because cicada larvae live in the soil and have a pair of powerful digging front feet. They usually stay in the soil for several years or even more than ten years.

The male cicada will make a sound to attract the female cicada to mate with him. It is inserting the oviposition tube at the top of it into the tree to lay eggs, and the larvae will not hatch until the next year. The eggs laid on the branches will continue to develop with the help of the nutrition of the branches. Until it develops into a larva. After the branches died, cicada larvae fell to the ground with the branches.

Larvae will continue to crawl in the soil, make holes, look for roots, and suck the juice from the roots of plants with mouthparts, weakening the tree, causing branches to die and affecting the growth of trees.

Extended data

The value of cicada

I. Edible value

Cicada is not only the food of ordinary people, but also a feast for kings and nobles. So far, the custom of eating cicada is still preserved in many places. Cicada can be eaten in a variety of ways, such as stewing and frying. Insects such as earthworms, grasshoppers, ants, bean worms and silkworm chrysalis are all high-protein foods. According to the nutritionist's determination, cicada contains as much as 72% protein, which is a natural nutrient.

Second, the medicinal value

Cicada molting, the shell of cicada nymph, is a kind of Chinese herbal medicine. In addition, there are eggs, nymphs, adults and so on. Parasitic by microorganisms such as fungi, it will produce "cicada flowers" similar to Cordyceps sinensis.

Baidu Encyclopedia-Cicada (Hemiptera Cicadellidae)

Baidu encyclopedia-cicada monkey