Neophasia menapia
Pest description and crop damage A dark green caterpillar with two white stripes down each side feeds on needles. They do little damage except during outbreak years.
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. 24).