Douglas-fir beetle, Dendroctonus pseudotsugae Order: ColeopteraFamily: Curculionidae Description The Douglas-fir beetle (Dendroctonus pseudotsugae) is native to North America and the most important tree-killing bark beetle inhabiting the western United States. This...
Spongy moth, Lymantria dispar Order: Lepidoptera Family: Erebidae Description Male moths have a wingspan of about 3.8 cm (1.5 inches), while females have a wingspan of up to 8.9 cm (3.5 inches) and are more heavy-bodied. The forewings of males are usually brown with...
Shade tree borers Orders: Coleoptera, Lepidoptera, Hymenoptera Description and life history Many different insects are classified as wood borers, including certain species of Coleoptera, Lepidoptera, and Hymenoptera. These insects vary in appearance and develop by...
Scale insects affecting conifers Order: HemipteraFamily: Coccidae, Diaspididae, Matsucoccidae Description, life history, and host range Several scale insects can attack coniferous trees in Colorado. The two most damaging species are the pine needle scale (Chionaspis...
Insect and mite galls Orders: Acari, Hemiptera, Hymenoptera, Diptera Families: Adelgidae, Agromyzidae, Aphalaridae, Aphididae, Eriophyidae, Cecidomyiidae, Cinipidae Description and life history Galls form when plant tissues grow abnormally in response to wounds,...
