is a North American aphid with a preference to various species of trees.
Common names. Giant bark aphid, Giant bark feeder.
Distribution. This aphid is found in southern Canada and throughout the United States, except in the northwest.
Host associations. It has a moderate host range, having been recorded from species of over 16 plant families.
Economic importance. It is particularly important on tree species that include, hickory and walnut (Juglandaceae), chestnut and oak (Fagaceae), pear (Rosaceae), but also attacks a broad range of other tree species such as basswood, elm, maple, sycamore, willow. It has not been implicated in the transmission of any plant virus.
See also. Taxonomy at Aphid Species File. Aphids on the World's Plants. Literature references.