Description
    The periodical cicada is also known as the 13year (Magicicada tredecassini Alex. & Moore) or the 17-year (M. septendecim (L.)) locust, appearing in great numbers every 13 years in the South and every 17 years in the North. Periodical cicadas are widely distributed throughout eastern United States.

    Adult cicadas are large, dark, heavy-bodied insects with membranous wings and red eyes. The females possess a strong ovipositor. Adult cicadas can reach 1-1/2 inches in length. Nymphs live in the soil, feeding on plant roots, and so are rarely seen. Adult male cicadas produce a characteristic sound by vibrating their wings against their body.

Injury
    Injury to black walnut trees is caused by the adult female as she uses her ovipositor to make jagged slits in the bark and wood of twigs and small branches. Shredded wood fibers may be seen protruding from the slits. Affected twigs and branches are weakened and commonly break off in strong winds. Oviposition scars may be visible for several years after the injury was made.

Control
    No controls are recommended.