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PART IBiological control of agricultural insects in Canada 19591968
PART IIBiological control of weeds in Canada 19591968
PART IIIBiological control of forest insect pests in Canada 19591968
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adults aphid apple areas attack Austria Bacillus thuringiensis bacterium Belleville beneﬁts biological control agents biological control attempts biotic British Columbia Brunswick Canada Canada Department cent chemical control cocoons codling moth Coleophora Coleoptera control programme crop damage defoliation density Department of Agriculture Department of Fisheries Diptera disease economic effective eggs erichsonii established Europe European pine evaluation ﬁeld ﬁrst Fisheries and Forestry ﬁve ﬂowers Forest Insect forest tent caterpillar Germany hercyniae host Hymenoptera hyperparasites Ichneumonidae important infested inﬂuence insecticides integrated control introduced parasites inundation jacobaea larch casebearer larch sawﬂy larvae Lepidoptera maggot Manitoba methods mite mortality native natural enemies nematode Neodiprion Newfoundland Nova Scotia Ontario orchards outbreaks oviposition parasites pathogens pest control pine sawﬂy plants polyhedrosis populations potential predators problems Province pupae pyricola Quebec regional Research Station satin moth sertzfer signiﬁcant species speciﬁc spray studies success swainei Tachinidae trees virus viruses weed weevil winter moth