SEX ATTRACTANTS FOR TWO SPECIES OF WESTERN SPRUCE BUDWORM, CHORISTONEURA BIENNIS AND C . VIRIDIS (LEPIDOPTERA: TORTRICIDAE)

Field trials were conducted in British Columbia and Oregon in 1972, which demonstrated that trans -11-tetradecenal, a sex attractant for male Choristoneura fumiferana and C . occidentalis , is also a sex attractant for male 2-year-cycle spruce budworm, C . biennis , and that trans -11-tetradecenyl acetate is a sex attractant for male green budworm, C . viridis Free.