Insect Management Handbook

Several species

See:

Common Pests of Nursery Crops

Xyleborus dispar

Includes

European red mite (Panonychus ulmi)
Twospotted spider mite (Tetranychus urticae)

See:

Common Pests of Nursery Crops

Scolytus rugulosus

Pest description and crop damage Small black beetles with antennae, legs, and tips of elytra cinnamon red. Normally attack sickly trees by boring into limbs. Also bore into buds of healthy trees.

Scouting and thresholds Entry holes and borer damage greatly affect marketability, action thresholds are very low. Prevention is key.

Management-cultural control

Quadraspidiotus perniciosus

See:

Common Pests of Nursery Crops

Schizura concinna

Pest description and crop damage Mature larvae are reddish or yellow and have several spines on each segment. The entire body is lined with white, dark reddish brown, and black lines. The head is red, and the fourth segment is humped. Has been a problem on cherry and other hosts east of the Cascades.

Management-biological control

See:

Caliroa cerasi

Pest description and crop damage Pear sawfly is a European insect now found in most areas of the U.S. It attacks both pear and cherry and also is found on mountain ash, hawthorn, and ornamental Prunus. The adult is a glossy black wasp, about 0.2 inch long. The larva initially resembles a small slug due to the olive green slime that covers the body, and the fact that the head is wider than the rest of the body. Mature larvae are 0.375 inch long and orange-yellow.

Enarmonia formosana

Choreutis pariana

Pest description and crop damage Adult moth is reddish brown, with a wingspread less than 0.5 inch, and irregular light and dark bands on the wings. Larvae are 0.5 inch long, yellowish to greenish, with black spots and a yellow-brown head. Pupae are yellow to brown with a white silken cocoon. The larvae skeletonize and roll leaves. They feed on apple, crabapple, cherry, and hawthorn.

Includes black cherry aphid (Myzus cerasi) and rusty plum aphid (Hysteroneura setariae)

See:

Common Pests of Nursery Crops