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Dogwood (Cornus)-Rose leafhopper Edwardsiana rosae and other leafhoppers Pest description and damage Rose leafhoppers are small (0.14 to 0.16 inch in length), active, whitish-green insects that run backward, forward, or sideways when disturbed. The nymphs ...

Dogwood (Cornus)-Dogwood sawfly Macremphytus tarsatus Pest description and damage Dogwood sawfly is a recent introduction to the Pacific Northwest. They are found feeding on red osier dogwood (Cornus sericea). Eggs are small bumps under the epidermis of l ...

Douglas-fir (Pseudotsuga)-Aphid Giant conifer aphids (Cinara spp.) Cinara pseudotsugae Pest description, and damage These aphids infesting Douglas-fir are up to 0.2 inch in length. They range in color from gray to brownish to black. Aphids establish large ...

Douglas-fir (Pseudotsuga)-Brown soft scale Coccus hesperidum Pest description and damage Scale insects are small (less than 0.125 inch in length) soft insects that live beneath waxy scales. These insects are often identified by the shape and size of their ...

Douglas-fir (Pseudotsuga)-Coneworm Dioryctria spp. Pest description and damage Adult coneworms are mottled gray or brown snout moths banded with subtle waves of color and about 0.6 to 0.7 inch in length. Coneworm larvae are small and cream-colored or ligh ...

Douglas-fir (Pseudotsuga)-Cooley spruce gall adelgid Adelges cooleyi Pest description and damage This aphid-like insect feeds on new needle growth of Douglas-fir. Adelgids appear as woolly or cottony tufts on the undersides of needles; heavily infested tr ...

Douglas-fir (Pseudotsuga)-Douglas-fir needle midge Contarinia spp. Pest description and damage The adult Douglas-fir needle midge is a tiny (around 0.05 inch in length) delicate-looking fly. Three different midges infest Douglas-fir: one species feeds nea ...

Douglas-fir (Pseudotsuga)-Douglas-fir tussock moth Orgyia pseudotsugata Pest description and damage The adult male is brown to gray with a 1-inch wingspan that flies during the day in search of the wingless female moth. The larvae feed on pine needles and ...

Douglas-fir (Pseudotsuga)-Douglas-fir twig weevil Cylindrocopturus furnissi Pest description and damage The Douglas-fir twig weevil is a small (about 0.1 inch in length), wingless, grayish-black beetle with white markings and sometimes pinkish spots. The ...

Douglas-fir (Pseudotsuga)-Pine needle scale Includes Pine needle scale (Chionaspis pinifoliae) Black pine scale (Dynaspidiotus (Nuculaspis) californica) Pest description and damage Scale insects are small (less than 0.125 inch in length) soft insects that ...