Pest description and crop damage Small, dull green aphid causes extreme needle drop. Aphid appear early in the season (about February) and may increase rapidly during March and April.
See "Spruce" in:
Halisidota argentata
Pest description and crop damage Larvae hibernate in dense clusters on twigs and become active on warm winter days. Larvae mature in June. Pine, arborvitae, and true fir also are subject to attack. Damage may be in late fall or early spring.
Pest description and crop damage Mature larvae are about 1 inch long, hairy, gray or light brown, with black heads. Several light brown or cream-color tufts of hair are on the body. Defoliate trees. Also attacks Douglas-fir, true firs, pine, and larch.
Pest description and crop damage Small, brownish cream larvae of shoot moths bore into fresh green cones. May also bore into trunk cambium, branches, and shoots.
Pest description and crop damage The small greenish larvae mine leaves. Later, they feed on terminal leaves and bore into developing flowers and inside the stems. Adult is grayish brown with narrow plumed wings and a 0.5 inch wingspread.
