Search Insect Handbook

Douglas-fir (Pseudotsuga)-Pitch moth Douglas-fir pitch moth (Synanthedon novaroensis) Sequoia pitch moth (Synanthedon sequoiae) Pest description and damage These adults are clearwing moths about 1.0 to 1.25 inch in length with either yellow and black mark ...

Douglas-fir (Pseudotsuga)-Silver-spotted tiger moth Lophocampa argentata Pest description and damage Adult moths have a 2-inch wingspan and are brownish or tan with distinct silvery translucent spots on the wings. The caterpillars can reach 1.5 inches in ...

Douglas-fir (Pseudotsuga)-Spruce spider mite Oligonychus ununguis Pest description and damage Several species of spider mites can cause damage in coniferous ornamentals. The appearance of these mites varies with the species, although all are 0.02 inch or ...

Elderberry (Sambucus)-Borer Elderberry borer (Desmocerus aureipennis) Pest description and damage The immature roundheaded borer that matures to a 1.0 to 1.25 inch long reddish cerambycid beetle with a black thorax and head is found on elderberry in Washi ...

Elderberry (Sambucus)-Leafcutting bee Megachile spp. Description and crop damage Leafcutting bee activity is noted by the uniform oval and round pieces cut from the edges of leaves. The adult bee is about 0.4 inch in length, black with white stripes, and ...

Elm (Ulmus)-Aphid Woolly apple aphid (Eriosoma lanigerum) Woolly elm aphid (Eriosoma americanum) Pest description and damage Several species of aphids can become problems as foliar, twig or stem, or root feeding pests on elms. Some of the aphids have a su ...

Elm (Ulmus)-Bark beetle Includes Elm bark beetle (Hylurgopinus rufipes) Scolytus spp. Pest description and damage Elm bark beetles are about 0.13 inch in length and shiny brown or black. The larvae are white, legless, and about 0.16 inch in length. Larvae ...

Elm (Ulmus)-Carpenterworm Prionoxystus robiniae Pest description and damage Carpenterworms are the larvae of a large, mottled gray and black moth whose size ranges from 1.75 to 3.0 inches in length. The caterpillars are white to pinkish red with a dark he ...

Elm (Ulmus)-Elm leaf beetle Xanthogaleruca luteola Pest description and damage Adult elm leaf beetles are approximately 0.25 inch in length and yellow to greenish with two dark stripes. Older adults are darker. The 0.25-inch larvae are greenish or yellowi ...

Elm (Ulmus)-Elm leafminer Fenusa ulmi Description and crop damage Adults are tiny (about 0.16 inch in length), black, fly-like sawflies which can be seen on new foliage on sunny days. Small, legless leafminer larva feed between the layers of leaf epidermi ...