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Host selection behavior of the Douglas-fir pitch moth, Synanthedon novaroensis (Hy. Edwards) (Lepidoptera:Sesiidae), related to intermediate silvicultural activities
The Douglas-fir pitch moth (DFPM), Synanthedon novaroensis, is attracted to exudations of oleoresin and oviposits at wounds on the bole of host trees. Larvae then feed in subcortical regions of vigourously growing hosts. With the increase use of pruning in young stands of Douglas-fir, Pseudotsuga menzesii (Mirb.) Franco, the ...