Insect Management Handbook

Prionoxystus robinae

Pest description and crop damage Large white larva (1 to 3 inches) bores 0.5-inch-diameter holes in trunk and main branches and eventually kills trees. Adult moth is speckled gray. Three-year life cycle.

Management-cultural control

Keep trees vigorous.

Management-chemical control

See:

Various species

See:

Common Pests of Nursery Crops

Caliroa cerasi

See:

Cherry, flowering (Prunus)-Pear sawfly

Synanthedon exitiosa

See:

Apricot, flowering (Prunus)-Peachtree borer

Anuraphis helichryse

See:

Common Pests of Nursery Crops

Pest description and crop damage Causes extreme leaf curling.

Management- biological control

See:

Biological Control of Nursery Pests

Phorodon humuli

See:

Common Pests of Nursery Crops

Pest description and crop damage Soft-body, bluish green insect found on the underside of leaves or in rolled leaves. Heavy infestations cause severe defoliation.

Management- biological control

See:

Pissodes strobi

Pest description and crop damage Adults are about 0.25 inch long and light to dark brown with a prominent curved back. They kill terminal shoots and deform the tree.

See "Pine" in:

Christmas Tree Plantation Pests

Management-cultural control

Remove and burn infested shoots.

Oligonychus spp.

See:

Common Pests of Nursery Crops

See "Pine" in:

Christmas Tree Plantation Pests

Synanthedon sequoiae

Pest description and crop damage Larvae of a clearwing moth feed in tree limbs and trunks. Trees under attack are almost always previously stressed. A mass of pinkish pitch at the feeding site is evidence of infestation.

See "Pine" in:

Christmas Tree Plantation Pests

Eulachnus rileyi

See:

Common Pests of Nursery Crops

Pest description and crop damage Powdery gray aphid, active all season, causes early needle drop.

See "Pine" in:

Christmas Tree Plantation Pests