Journal of the Entomological Society of British Columbia
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Comparative evaluation of traps for monitoring the Douglas-fir tussock moth (Lepidoptera: Lymantriidae)
Get PDFDelta sticky traps consistently caught at least as many Douglas-fir tussock moths as did five other trap types in field experiments. Omni-directional non-sticky traps based on the Lindgren multiple funnel trap were relatively successful, but highly variable. Wind tunnel tests with a simulated pheromone (= titanium tetrachloride smoke), showed that plums generated from Lindgren 2-funnel traps contaminated the exterior surfaces of the traps and inhibited entry. Modified Lindgren 2-funnel traps with a plastic insert to reduce turbulence in the plume and with collecting jars containing water only, caught significantly fewer Douglas-fir tussock moths than traps with empty jars or jars containing soupy water or DDVP insecticide (No-Pest Strip). Traps with jars containing soapy water caught more Douglas-fir tussock moths than traps with jars containing DDVP, but catches were not different from those in traps with empty jars. The catches in traps with empty jars and jars containing DDVP were not significantly different.Non-sticky traps show promise for monitoring the Douglas-fir tussock moth. However, improved designs must facilitate rapid capture of moths landing on the trap, and contamination of exterior surfaces must be minimized
The aphids (Homoptera: Aphididae) of British Columbia 12. Further additions
Get PDFSix species of aphids and new host records are added to the taxonomic list of the aphids of British Columbia
Morphology of Myrmecophila manni, a myrmecophilous cricket (Orthoptera: Gryllidae)
Get PDFScanning electron microscopy showed that the myrmecophilous cricket, <i>Myrmecophila manni</i> Schimmer, retains many structural features common to typical gryllids and has few of the morphological features often associated with myrmecophily. However, the mouth parts, particularly the labrum and epipharynx, are highly modified for strigilation and trophallaxis. The structure of the ovipositor is unique in that it can expand greatly to permit the passage of large eggs. This cricket also differs from typical gryllids in having stemmata instead of compound eyes, a feature probably related to its life inside dark ant nests where it does not need good vision. Behavioral, rather than morphological, attributes are probably more important in adapting the crickets for life with ants
Mechanical pencils for microdissection
Get PDFReplacing the lead of a 'fine line' mechanical pencil with an entomological pin produces a convenient, adjustable probe for microdissection work
Manipulations of egg-gallery length to vary brood density in spruce beetle, Dendroctonus rufipennis (Coleoptera: Scolytidae): Effects on brood survival and quality
Get PDFDifferent brood densities were produced under a constant bark surface area of the spruce host, by excising egg-producing female <i>Dendroctonus rufipennis</i> from the host material after they had excavated galleries of specified lengths. This procedure allowed a constant attack density. The numbers of adult progeny produced/cm of egg-gallery were significantly greater from bark slabs with short galleries and low densities: the sizes (pronotal widths) of adult progeny of both sexes were also significantly greater from low than from high densities; and the distribution patterns of chromatin differed significantly among high, medium and low densities
