The leaf roller Pseudexentera oregonana Wlshm
Bi-monthly Research Notes Department of Forestry Canada
This leaf roller is active on trembling aspen (Populus tremuloides Michx.) early in the spring in western Canada. It has often been listed in the Annual Report of the Forest Insect and Disease Survey as causing serious defoliation from western Manitoba to the interior of British Columbia.
Wong, H.R., Melvin, J.C.E. 1967. The leaf roller Pseudexentera oregonana Wlshm. Bi-monthly Research Notes Department of Forestry Canada 23(1):3-4.