The Spotted Lanternfly
It is a destructive, invasive plant hopper that attacks many hosts including grapes, apples, stone fruits, walnut, willow, and tree of heaven. It has been confirmed in New Castle County. We are the second state to have found the insect, which was first detected in Pennsylvania in 2014.
Susceptible tree species such as tree of heaven, walnut and willow might develop weeping wounds, leaving a grey or black trail along the trunk. In late fall, adults will lay egg masses on host trees and nearby smooth surfaces like stone, outdoor furniture, and vehicles. Newly laid egg masses have a grey mud-like covering.