Introduction Eastern spruce gall adelgid (Adelgis abietis) is an insect that inflicts considerable damage to ornamental spruce trees. The larvae induce the formation of cone-like galls on developing twigs, which…

Introduction Boxwood leafminer (Monarthropalpus flavus) is a small midge that feeds on the leaves of boxwood. It is considered the most serious pest of boxwood. During its larval stage, boxwood…

Introduction White pine bark adelgid (Pineus strobi) is a small insect that defoliates eastern white pine, and several other species of pine. Though seldom fatal, severe infestations can be an…

Introduction Two-lined chestnut borer (Agrilus bilineatus) is a beetle that is native to North America. It is a member of the beetle family Buprestidae. Two-lined chestnut borer was once considered…

Introduction Red pine scale is a small exotic insect that infests several species of pine. The insect’s preferred host is red pine. Red pine scale was first discovered in 1946,…

Introduction Isabella tiger moth (Pyrrharctia isabella) is one of the most common insects in North America. It is recognized for its distinct coloration, and stiff bristles, which are soft to…

Introduction Ailanthus webworm is an ermine moth commonly found throughout the United States. The insect originated in South Florida and the American tropics, where it infested two plants: paradise tree…

Introduction Hyphantria cunea, also referred to as fall webworm, is a native insect of North America. Fall webworm passes through four stages during its life cycle, with the larval and…

Introduction Fiorinia externa, also referred to as elongate hemlock scale or fiorina scale, is an insect native to Japan that infests eastern hemlock, northern Japanese hemlock, Carolina hemlock, fir, and…

Introduction Paleacrata vernata, also referred to as spring cankerworm, is an insect native to North America that defoliates numerous deciduous trees and shrubs. Larvae appear from late April to early…