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Plum, flowering (Prunus)-Peach twig borer Anarsia lineatella Pest description and damage Peach twig borer is a European insect first found in California in the 1880s. It is a major pest of apricots, peaches, plums, and prunes. There are no native hosts ou ...

Plum, flowering (Prunus)-Pear sawfly (pear slug) Caliroa cerasi Pest description and damage Pear slug is found in most areas of the U.S. It attacks pear, cherry, and other ornamental Prunus. The adult is a glossy black fly-like insect, about 0.2 inch in l ...

Plum, flowering (Prunus)-Lecanium scale Includes Parthenolecanium corni and others 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 s ...

Plum, flowering (Prunus)-Tent caterpillar Forest tent caterpillar (Malacosoma disstria) Western tent caterpillar (Malacosoma californica) Pest description and damage The western tent caterpillar attacks a wide variety of plants, including alder, ash, birc ...

Poplar (Populus)-Aphid Includes Poplar petiolegall aphid (Pemphigus populitransversus) Pemphigus populicaulis Pest description and damage There are nearly a dozen aphids that feed on poplar leaves, petioles, stems, and bark. Many have herbaceous alternate ...

Poplar (Populus)-Azalea bark scale Eriococcus azaeleae Pest description and damage The immature scales superficially resemble mealybugs in appearance. Mature female scales are about 0.125 inch in length and appear like white cottony sacs, often located on ...

Poplar (Populus)-Carpenterworm Prionoxystus robinae Pest description and damage Carpenterworms are the larvae of a large, mottled gray and black moth (goat moth). The caterpillars are white to pinkish red with a dark head and are 1 to 3 inches in length w ...

Poplar (Populus)-Fall webworm Hyphantria cunea Pest description and damage These gregarious caterpillars spin web-like tents in branch tips of deciduous trees including apple, cherry, peach, pecan, English walnut, black walnut, ash, boxelder, birch, choke ...

Poplar (Populus)-Oystershell scale Lepidosaphes ulmi Pest description and damage The mature scale insect is approximately 0.125 inch in length beneath a pinkish brown or gray scale that is usually elongated and slightly curved like an oyster or mussel she ...

Poplar (Populus)-Poplar-and-willow borer Cryptorhynchus lapathi Pest description and damage The adult poplar-and-willow borer is a black and pink to cream-colored weevil (a flightless snout beetle) about 0.375 inch in length. The larvae are white, legless ...