Abstract
In oviposition choice experiments, caged Choristoneura fumiferana (Clem.) showeda preference for white spruce over balsam fir. However, there was no significant difference between the number of eggs laid on English yew and white spruce. Larvae reared on artificial diet supplemented with ground needles of yew did not survive. Development of larvae to normal adults on diets containing ground needles from white pine, Norway spruce, balsam fir, white spruce, hemlock, and Douglas-fir ranged from 25 to 52%, and that on control diet was 52%. The results suggest that spruce budworm moths do not necessarily discriminate against nonhost trees and will oviposit on foliage unsuitable for larval development.
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