Sugar-maple-pest
Guides
Corthylus punctatissimus
Pitted Ambrosia Beetle, Maple Corthyle
Corthylus punctatissimus, commonly known as the pitted ambrosia beetle or maple corthyle, is an ambrosia beetle in the family Curculionidae. It is a documented pest of sugar maple (Acer saccharum) in northeastern North America, with established populations in southern Ontario, southern Quebec, and the Lower Peninsula of Michigan. The beetle targets small-diameter woody saplings and shrubs, boring into stems at soil level and creating spiral gallery tunnels that cause girdling damage and wilting of host trees.