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adults Agriculture Canada alfalfa aphid apical truncation apple maggot application arthropods August azinphosmethyl bees beetles Biology blancardella carbofuran carrots chlorpyrifos Chrysididae Coleoptera collected colour corn borer County crop cutworm Cyprex damage darksided cutworm degree-days Diptera Econ effective eggs Elampus emergence Entomol Entomological Society feeding females field foliage green Harrow hatch hive holotype host Hymenoptera infested insecticides insects instar July June laboratory larvae leaf leafhopper leptophos mali mean number mite mortality mosquito nitidus Notozus observed Ontario orchards overwintering oviposition parasites parasitoid permethrin pest phorate phosmet plants plots pomonella populations predators Proc psylla punctures pupae reared recorded reported Research Station residues rootworm samples Scots pine significantly soil sowbugs species specimens spray stages Table temperature Tephritidae tergite traps treatment trees University of Guelph untreated Vineland violet viridicyaneus weevil