Pine (Pinus)-Powdery pine needle aphid

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

Management-chemical control

See:

Chemical Control of Nursery Pests

For more information

Johnson, W.T. and H.H. Lyon (1991), Insects That Feed on Trees and Shrubs, 2nd ed., Cornell University Press (p. 84).