Some Relationships between Host, Egg Potential, and Pupal Weight of the Elm Spanworm, Ennomos subsignarius (Lepidoptera: Geometridae)

Abstract

The elm spanworm, Ennomos subsignarius (H¼bner), a polyphagous defoliator of hardwoods, has been in outbreak in the southern Appalachians since 1954 (Fedde 1964). Host trees in the outbreak area are the oaks, Quercns spp., and the hickories, Carya spp.