Bjornson, Susan - St. Mary's University

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B.Sc., (Hons.) University of Guelph Ph.D., University of Alberta Professor and Chair, Department of Biology, Saint Mary's University

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Bjørnson S., Le J., Saito T., Wang H. 2011. Ultrastructure and molecular characterization of a microsporidium, Tubulinosema hippodamiae, from the convergent lady beetle, Hippodamia convergens, Guérin-Méneville. Journal of Invertebrate Pathology 106, 280-288. Saito, T. and Bjørnson, S. 2008. Effects of a microsporidium from the convergent lady beetle, Hippodamia convergens Guérin-Méneville (Coleoptera: Coccinellidae), on three non-target coccinellids. Journal of Invertebrate Pathology 99, 294-301. Bjørnson, S. 2008. Natural enemies of mass-reared predatory mites (Family Phytoseiidae) used for biological pest control. Experimental and Applied Acarology.46, 299-306. Bjørnson, S. 2008. Fecundity of commercially available convergent lady beetles, Hippodamia convergens Guérin-Méneville, following shipment. Biocontrol Science and Technology 18, 633-637. Bjørnson, S. 2008. Natural enemies of the convergent lady beetle, Hippodamia convergens Guérin-Méneville, used for augmentative biological control: their inadvertent importation and potential significance. Biological Control 44, 305-311. Joudrey, P., and Bjørnson, S. 2007. Effects of an unidentified microsporidium on the convergent lady beetle, Hippodamia convergens Guérin-Méneville (Coleoptera: Coccinellidae) used for biological control. Journal of Invertebrate Pathology 94, 140-143. Saito, T., and Bjørnson, S. 2006. Horizontal transmission of microsporidia from the convergent lady beetle, Hippodamia convergens Guérin-Méneville (Coleoptera: Coccinellidae), to three coccinellid species of Nova Scotia. Biological Control 39, 427-433. Bjørnson, S. and Raworth, D.A. 2005. Styrofoam boxes used for shipping mass-reared beneficial arthropods: Internal temperature responds rapidly to ambient temperature. Biocontrol Science and Technology 15, 755-760. Bjørnson, S. 2005. The diversity of microorganisms associated with the phytoseiid, Phytoseiulus persimilis (Acari: Mesostigmata). Systematic and Applied Acarology 10, 3-6. Bjørnson, S. 2005. Pathogens of mass-produced natural enemies for biocontrol. Encyclopedia of Pest Management (online journal, www.dekker.com). Bjørnson, S. and Raworth, D.A. 2003. Effects of plant nutrition on the expression of abdominal discoloration in Phytoseiulus persimilis (Acari: Phytoseiidae). The Canadian Entomologist 135, 129-138. Bjørnson, S., and Keddie, B.A. 2001. Disease prevalence and transmission of Microsporidium phytoseiuli infecting the predatory mite, Phytoseiulus persimilis (Acari: Phytoseiidae). Journal of Invertebrate Pathology 77, 114-119. Bjørnson, S., and Keddie, B.A. 2000. Development and pathology of two undescribed species of Microsporidia infecting the predatory mite, Phytoseiulus persimilis Athias-Henriot. Journal of Invertebrate Pathology 76, 293-300. Bjørnson, S., Raworth, D.A. and Bédard, C. 2000. Abdominal discoloration and the predatory mite Phytoseiulus persimilis Athias-Henriot: Prevalence of symptoms and their correlation with short-term performance. Biological Control 19, 17-27. Bjørnson, S., and Keddie, B.A. 1999. Effects of Microsporidium phytoseiuli (Microsporidia) on the performance of the predatory mite, Phytoseiulus persimilis (Acari: Phytoseiidae). Biological Control 15, 153-161. Larsson, J.I., Steiner, M.Y., and Bjørnson, S. 1997. Intexta acarivora gen. et sp. nov. (Microspora: Chytridiopsidae) - Ultrastructural study and description of a new microsporidian parasite in the forage mite Tyrophagus putrescentiae (Acari: Acaridae). Acta Protozoologica 36, 295-304. Bjørnson, S., Steiner, M.Y., and Keddie, B.A. 1997. Birefringent crystals and abdominal discoloration in the predatory mite, Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae). Journal of Invertebrate Pathology 69, 85-91. Bjørnson, S., Steiner, M.Y., and Keddie, B.A. 1996. Ultrastructure and pathology of Microsporidium phytoseiuli n. sp. infecting the predatory mite, Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae). Journal of Invertebrate Pathology 68, 223-230. Ellis, C.R., and Bjørnson, S. 1996. The biology and importance of Coleophora deauratella (Lepidoptera: Coleophoridae), a new pest of red clover in North America. Proceedings of the Entomological Society of Ontario 127,115-124. Bjørnson, S. Natural enemies of mass-reared predatory mites (Family Phytoseiidae) used for biological pest control. In “Diseases of Mites and Ticks” (J. Bruin & L.P. van der Geest, Eds.) pp. 299-306. Springer, The Netherlands. (previously published in Experimental and Applied Entomology 2008, vol. 46) Bjørnson, S., and Schütte, C. 2003. Pathogens of mass-produced natural enemies and pollinators, In “Quality Control and production of Biological Control Agents: Theory and Testing Procedures” (J.C. van Lenteren, Ed.) pp. 133-165. CABI, Wallingsford, UK. Schütte, C., Bjørnson, S., Kleespies, R.G., Huger, A.M. 2005. Natural enemies applied in biological pest control: pathogens in field and mass-reared populations. Bull IOBC/wprs 28(3), 185-187. Raworth, D.A., and Bjørnson, S. 2002. Fecundity and survival of mass-reared Phytoseiulus persimilis (Acari: Phytoseiidae). Bull IOBC/wprs 25, 233-236. Bjørnson, S. and Elliott, D. 1999. Percent parasitism and adult emergence of E. formosa from greenhouse whitefly pupae with multiple oviposition wounds. Bull IOBC/wprs 22, 13-16. Steiner, M.Y., and Bjørnson, S. 1996. Performance of Phytoseiulus persimilis and other biological control agents - on what are we basing our standards? Bull IOBC/wprs 19, 163-166.