Journal of the Entomological Society of British Columbia
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Factors of susceptibility in spruce beetle attack on white spruce in Alaska
Get PDFSpruce bark beetle activity was monitored over 14 years on a transect through a mixed white spruce stand on the Kenai Peninsula, Alaska. Data confirmed bark beetle preference for attacking large-diameter, slow-growing spruce. Increased bark beetle activity was noted on north facing slopes; the least activity was on ridge tops. Moisture stress brought about by low soil temperatures is believed to be the cause for increased susceptibiity of white spruce to beetle attack on north facing slopes. A rudimentary guide is given to rate uninfested spruce timber for probable high or low losses if attacked by spruce beetles
A check-list of the orthopteroid insects recorded from British Columbia
Get PDFA check-list of the 130 species of orthopteroid insects recorded from British Columbia is presented
Effect of diatomaceous earth, malathion, dimethoate and permethrin on Leploglossus occidentalis (Hemiptera: Coreidae), a pest of conifer seed
Get PDF<i>Leptoglossus occidentalis</i> Heidemann (Hemiptera: Coreidae) were exposed to diatomaceous earth, and sprays of dimethoate (0.1 and 1.0% a.i.) and permethrin (0.1% and 0.01% a.i.) in both laboratory and field tests and to malathion (0.1% a.i.) in a laboratory test. In field tests, permethrin and dimethoate caused significant (P < .05) mortality for two weeks after the sprays were applied and permethrin continued to be effective for a third week. Diatomaceous earth was not effective in field tests or in one of two laboratory tests. Malathion, dimethoate and permethrin caused significant mortality in both laboratory tests
An illustrated guide to the identification and distribution of the species of Dendroctonus Erichson (Coleoptera: Scolytidae) in British Columbia
Get PDFAn illustrated key is presented separating adults of the eight species of <i>Dendroctonus</i> Erichson occurring in British Columbia. Punctation on the episternal area of the prothorax and crenulations on the discal area of the clytra are used to provide reliable diagnoses of five species (<i>D. murrayanae</i>, <i>D. rufipennis</i>, <i>D. punctatus</i>, <i>D. simplex</i>, <i>D. pseudotsugae</i>) that could previously be distinguished only with considerable difficulty. Scanning electron micrographs illustrate these characters and simplify interpretation of the key. Distribution maps are provided which show many previously unpublished range extensions
