Elm leaf beetle, Xanthogaleruca luteola Order: ColeopteraFamily: Chrysomelidae Description The elm leaf beetle was first detected in the United States in 1830 and is now present throughout North America wherever elms are planted. It is a particularly important pest of...
Brownheaded ash sawfly, Tomostethus multicinctus Order: HymenopteraFamily: Tenthredinidae Description Adults of the brownheaded ash sawfly (Tomostethus multicinctus) resemble small dark black wasps that do not sting. They have a saw-like ovipositor used to lay eggs in...
Spider mites in shade trees Order: AcariFamily: Tetranychidae Description and life history Spruce spider mite, Oligonychus ununguis The spruce spider mite is a native pest of spruce and juniper. Adults are dark green or black and are extremely small at around 0.6 mm...
Tent caterpillars Order: LepidopteraFamilies: Erebidae, Lasiocampidae Description and life history Tent caterpillars, Malacosoma spp. Adults are generally a yellowish-brown color with faint wavy bands on the wings. These moths have a wingspan of 25–75 mm (1-3 inches)....
Oystershell scale, Lepidosaphes ulmi Order: HempiteraFamily: Diaspididae Description Unlike most insects, adult oystershell scales do not have legs, eyes, or antennae. Their appearance resembles a brown or grey oyster shell that is about 0.125 mm (1/8 inch) long. When...
