Cicada, whose larva is called cicada (cicada turtle), lives by sucking the juice from the roots, while adults live by sucking the juice from the trunk of branches. When laying eggs, it forcibly breaks the bark of the branch and produces it into the branch, and the laid branch will die! So any stage of it can be said to be an out-and-out pest. They have only two benefits for human beings: mature larvae can be cooked and eaten, and new abnormal adults can also eat them; The skin shed by larvae is cicada slough.