Cicada Situations & Solutions
Probably because of their regular population explosions, periodical cicadas have been confused with certain large grasshoppers that occur in crop-devastating swarms. It is these and other grasshoppers—not cicadas—that we properly call “locusts.”
Cicadas are among the most benign of insects. They can buzz impressively when trapped, but they don't sting or bite, or carry any disease communicable to people.
Neither the root-sucking nymphs nor the adults do any significant damage to trees or other plants.
Because of their great abundance, when female periodical cicadas lay eggs in fruit and ornamental trees, they can sometimes cause the tips of branches to break. Some experts have suggested that shade and forest trees may actually benefit from cicada "damage," which acts, in effect, as a natural pruning mechanism.
If you’re concerned about small trees in your yard, protect them with netting or any other open-weave material during the adults' life span (five to six weeks).