We return this week with our series on the common tree diseases and insect pests in the Chicago area with a closer look at a pest responsible for widespread defoliation, the gypsy moth.  The gypsy moth (Lymantria dispar dispar), also known as the European gypsy moth, is an invasive species from Europe.  It is known to devour the foliage of hundreds of species of trees and shrubs and can destroy millions of acres of trees in a single season. ...