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Rose (Rosa)-Western spotted cucumber beetle Diabrotica undecimpunctata Pest description and dam ag e The adult beetle is yellowish green, 0.25 inch in length, and has eleven black spots on its wing covers. Mature larvae are white, except for the head and ...

Sequoia/Redwood (Sequoia)-Juniper scale Carulaspis juniperi 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 ...

Skimmia (Skimmia)-Spider mite Includes Brown mite (Bryobia rubrioculus) Citrus red mite (Panonychus citri) Spider mite (Tetranychus spp.) Pest description and damage Several species of spider mites can cause damage in ornamental hosts. Appearance of these ...

Spiraea (Spiraea)-Aphid Green apple aphid (Aphis pomi) Spirea aphid (Aphis spiraecola) Pest description and damage These two aphids are virtually indistinguishable so are often treated the same. Aphids tend to be small (0.0625 to 0.125 inches), oval- to p ...

Spiraea (Spiraea)-Snapdragon plume moth Stenoptilodes antirrhina Pest description and damage Adult is a grayish to tan T-shaped moth with slender, plumed wings and a 0.5-inch wingspan. The small greenish larvae are about 0.5 inch long when mature. The lar ...

Spiraea (Spiraea)-Spider mite Tetranychus spp. Pest description and damage Several species of spider mites can cause damage to spiraea. Appearance of these mites varies with the species, although all are 0.02 inch or smaller. Adults and nymphs can be yell ...

Spruce (Picea)-Carnation tortrix Cacoecimorpha pronubana Description and crop damage Larvae are active, dark green, about 0.37 to 0.5 inch in length when mature, with a light brown to greenish brown head. This pest attacks many broadleaf evergreens. Cater ...

Spruce (Picea)-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. The coneworm larvae are small and cream-colored or light brown ...

Spruce (Picea)-Cooley spruce gall adelgid Includes Adelges cooleyi and other species Pest description and damage Many species of this aphid-like insect feed on newly growing needles of spruce although each species forms unique galls in different sectors o ...

Spruce (Picea)-Douglas-fir tussock moth Orgyia pseudotsugata Pest description and damage The adult male moth is brown to gray, about 1 inch across. During the day, the male flies in search of the wingless adult female. Once mated, the female moth lays egg ...