Pest description and crop damage Adult moth is satiny white. Larvae are approximately 2 inches long when grown, reddish brown, with white patches on top and tufts of hairs along sides. They can seriously defoliate trees such as cottonwood, poplar, and willow. They occasionally attack oak and aspen.
For more information
Johnson, W.T. and H.H. Lyon (1991), Insects That Feed on Trees and Shrubs, 2nd ed., Cornell University Press (p. 158).