A PARTIAL LIFE TABLE FOR THE DOUGLAS-FIR CONE MOTH, BARBARA COLFAXIANA (LEPIDOPTERA: OLETHREUTIDAE)

Abstract

AbstractA population of the Douglas-fir cone moth, Barbara colfaxiana (Kft.), was studied on the Buckhead Seed Production Area, Lowell Ranger District, Willamette National Forest, Oregon, during 1971. Factors contributing to the mortality of B. colfaxiana are presented in a partial life table and discussed. The egg – instar I was identified as the critical age interval and resinosis the critical factor.