Pest description and crop damage Small, light greenish brown larvae mine and web needles. Adult moth is dark brown with a wing expanse of 0.5 inch.
See "Spruce" in:
Apply late May or early June when moths and young larvae appear.
For more information
Johnson, W.T. and H.H. Lyon (1991), Insects That Feed on Trees and Shrubs, 2nd ed., Cornell University Press (p. 32).