by Norman E. Johnson
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Ambrosia-beetle infestation of down coni...
Report on sanitation-salvage beetle cont...
Douglas-fir cone insects and their contr...
Distribution of Sitka spruce weevil eggs...
The balsam woolly aphid on young Pacific...
Effectiveness of three systemic insectic...
Balsam woolly adelgid
Translocation of dye in grand and subalp...
Laboratory screening and field bioassays...
Balsam woolly aphid predators native to ...
Status of imported and native predators ...