Curriculum vitae: Daniel Lloyd Johnson University Education




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1CURRICULUM VITAE: Daniel Lloyd Johnson

University Education
1978 B.Sc. Magnis cum honoribus (Biology, High Honours), University of Saskatchewan, Saskatoon; College Scholar Honours Thesis: Subarctic soil microarthropods and fire history (Supervisor: R.L. Randell)
1980 M.Sc. Department of Plant Science, & Institute of Animal Resource Ecology, University of British Columbia, Vancouver, B.C. M.Sc. dissertation: Growth and regulation of springtail populations, with special reference to predation by pseudoscorpions. 120 pp. (soil biology and ecology; Supervisor: W.G. Wellington)
1983 Ph.D. Department of Plant Science, & Institute of Animal Resource Ecology, University of British Columbia, Vancouver, B.C. Ph.D. dissertation: Dispersal, predation and weather in an orchard mite system. 183 pp. (computer modelling and field experimentation of predator-prey ecology and biological control; Supervisor: W.G. Wellington).
Citizenship

Canadian (1983-), and U.S. (birth)


Employment, positions and duties

1972-1974 Trades (metalwork, woodwork, horticulture)

1976-1977 Technical assistant, Caribou Range Ecosystem Study, Porter Lake, subarctic Canada. Supervisors: Ed Johnson, J. Stan Rowe, Steve Bradley, James Ritchie

1976-1982 University lab instructor (Geography and Biology, University of Saskatchewan; Statistics, and Experimental Design, University of British Columbia)

1983-2003 Research Scientist, Agriculture and Agri-Food Canada Research Branch

(Senior Scientist RES-4 at departure)

1983- Project Manager and Leader of over 70 externally funded research projects, including NSERC Strategic, USAID, Alberta Crop Industry Development Fund, industrial partner funding, World Wildlife Fund, AAFC, CIDA, and others

1988-1989 ‘TDY' Consultant, US Agency for International Development, Washington, DC;

(field experimentation in non-chemical anti-locust research, Mali, West Africa)

1989-1990 Review Committee member, CAB International Locust project (UK, Mali, Benin)

1990-2001 Chair, Computer Use and Development Committee, Research Centre, Lethbridge

1993-2002 Adjunct Professor, University of Lethbridge; Developed and taught the first courses in GIS, Biogeography, and Agroecosystem Modelling

1990-1996 Project Monitor for Canadian International Development Agency (CIDA),

Biological Control of Locusts and Grasshoppers in Africa; CIDA GIS team member,

Rice Production and Protection, Malaysia; Review Committee member, CABI, CIDA

1996-1998 Review Committee member, USDA/ARS; Review Committee member, NSERC

1998-1999 Vice-President, Entomological Society of Canada

1999-2000 President, Entomological Society of Canada

1999-2003 Editor and webmaster, Guide to Integrated Control (200 pp.), Western Committee on Crop Pests

2000-2006 Council Representative, American Institute of Biological Sciences, Washington, D.C

2001-2004 Member of the Academic Committee of Key Laboratory of Biocontrol Resources,

Research and Utilization, Ministry of Agriculture, People's Republic of China, 2001-2004

2001-2003 Editor, Bulletin of the Entomological Society of Canada

2002-2006 American Institute of Biological Sciences (www.aibs.org), Executive and Board Member

2002-2008 National Burrowing Owl Recovery Team (Canada), member; two terms

2003-2009 Member of the Editorial Board, Acta Entomologica Sinica

2003-2007 Soapweed and Yucca Moth Recovery Team, member (Canada)

2004-2007 Western Spiderwort Recovery Team, member (Canada)

2004-2011 Canada Research Chair in Sustainable Grassland Ecosystems, University of Lethbridge

(http://www.chairs.gc.ca/)

2004- Professor of Environmental Science, Department of Geography, University of Lethbridge; tenured; affiliations: Dept of Biological Sciences, Dept of Math and Computer Science

2004- Editorial Board Member, Insect Science (Blackwell Publishing)

2005-2009 Adjunct Professor, Department of Geography, University of Guelph, Guelph, ON

2004-2005 Organizer and Conference Chair, 9th International Conference of the Orthopterist's Society

(world meeting held every four years)

2004-2005 Local Arrangements Chair, Entomological Society of Canada, annual meeting

2006-2009 Member, Arthropod subcommittee of COSEWIC,

Committee On the Status of Endangered Wildlife in Canada

2007-2011 Member of the Alberta Environmental Appeals Board, http://www.eab.gov.ab.ca/ .

2008-2009 National Defence Contractor (3; environmental research), 4 Wing Cold Lake


Awards and Distinctions

During University training

1971 University of Minnesota, National Defense Student Loan Program

1976 University of Saskatchewan Outstanding Second-year Student Award

1980-1981 University of British Columbia Graduate Scholarship

1982 Natural Sciences and Engineering Research Council (NSERC) Scholarship

1982-1983 Izaak Walton Killam Post-graduate Fellowship
Post-University training

1989-2009 Invited Plenary and Symposium Speaker, scientific conferences, Canada, Italy, China, US, Africa

1992 C. Gordon Hewitt Award for Outstanding Achievement by an Individual under 40

(medal awarded by Entomological Society of Canada)

2000 Lethbridge Research Centre Staff Award (contributions to elementary schools, public education)

2000 Service Award presented by the Entomological Society of Canada (President)

2001 Government of Canada "Distinction 2000 Award - Gold Medal" (insect forecasting team)

2002 "Green Crusader" cover story of the Canadian Geographic, May/June 2002 issue

2003 Service Award, Entomological Society of Canada (Bulletin Editor)

2004 Fellow International of the Explorer's Club (FIEC), and Member, Canadian Chapter

2009 Nominated for the Jay Newman Award for Academic Integrity (University of Guelph)
University courses taught

Principles of Biogeography GEOG3850 & GEOG3090

Geographic Information Systems GEOG3740 & GEOG4740

Agroecosystem Modelling ECON3000 & ECON4310

Environmental Science ENVS500 (First Nations Transition Program)

Environmental Science ENVS4000, 2005: Agroecosystems

Environmental Science ENVS4000, 2006: Ecosystem Monitoring

Environmental Science ENVS4000, 2007: Impacts of Climate Change

Environmental Science ENVS4000, 2008: Environmental Impacts

Environmental Science ENVS4000, 2009: Sustainable Development

STAT3850: Design and Analysis of Experiments

GEOG2700: Geographical Data and Analysis


Co-teaching:

ECON3850 Economics and Ecology of Natural Resources

GEOG1010 Introduction to Geography

Independent studies (17); Post-doc (2); PhD (2); MSc (6)


Publications in Science

Research (refereed scientific journals), 85; Other Scientific, 15; Books and book chapters, 6; Published photographs, 200+; Reports, 90+; Proceedings and abstracts, 150+; Technology transfer articles, 100+


Relevant Work in Science

The focus of current research is the ecology and sustainable use of grassland ecosystems (native, range, and cultivated), based on research in biogeography and organismal biology (insects, plants, vertebrates, pathogens and decomposers). Topics of research include reducing ecological impacts of pesticides; development of biological control, geographical and spatial analysis, biometeorology, watersheds and water quality, ecosystem processes, forecasting, alternatives to insecticides, pest outbreak management, population sampling, biophysical and ecological modelling, foodweb dynamics, impacts of weather and climate, assessment of biodiversity, food web linkages and modelling, ecology of species at risk, and management practices. New research (2005-2011) includes mainly the Canada Research Chair in Sustainable Grassland Ecosystems.



Selected papers. http://people.uleth.ca/~dan.johnson/htm/djpub.htm




Adatia, A., Johnson, D.L., and Entz, S. 2009. Pathogenicity of two new isolates of Metarhizium anisopliae from Canadian soil to Melanoplus bivittatus (Orthoptera: Acrididae) and Tenebrio molitor (Coleoptera: Tenebrionidae). Can. Entomol. in press


Yang, Nian-Wan, Li, Ai-Lian, Wan, Fang-Hao, Liu, Wan-Xue, and Johnson, Dan. Effects of plant essential oils on the immature and adults of the sweetpotato whitefly, Bemisia tabaci biotype B. Crop Protection, in review.

Booth, M., and Johnson, D.L. 2009. Pressurized-canister trunk injection of acephate, and changes in abundance of Red Elm Bark Weevil (Magdalis armicollis) on American Elm (Ulmus americana) . Arboriculture & Urban Forestry 35: in press


Grant, K.M., Johnson, D.L., Hildebrand, D.V., and Peddle, D.R. 2009. Quantifying Biomass Production on Rangeland in Southern Alberta using SPOT Imagery. Canadian Journal of Remote Sensing, in review.
Larson, R.P., Byrne, J.M., Johnson, D.L., Letts, M.G., and Kienzle, S.W. 2009. Refinement and Validation of a Spring Runoff Model for the Rocky Mountains, Northern Montana. Journal of Hydrology, in review.
Larson, R.P., Byrne, J.M., Johnson, D.L., Letts, M.G., and Kienzle, S.W. 2009. Potential climate change impacts on spring runoff in Montane Headwaters of the St. Mary River, Glacier National Park, Montana, USA. Journal of Hydrology, in review.
Entz, S.C., Kawchuk, L.M. and Johnson, D.L. 2008. Discovery of a North American genetic variant of the entomopathogenic fungus Metarhizium anisopliae var. anisopliae pathogenic to grasshoppers. BioControl 53(2): 327-339.
Wall D.H., Bradford, M.A., St John, M.G., Trofymow, J.A., Behan-Pelletier, V., Bignell, D.E., Dangerfield, J.M., Parton, W.J., Rusek, J., Voigt, W., Wolters, V., Gardel, H.Z., Ayuke, F.O., Bashford, R., Beljakova, O.I., Bohlen, P.J., Brauman, A., Flemming, S., Henschel, J.R., Johnson, D.L., Jones, T.H., Kovarova, A., Kranabetter, J.M., Kutny, L., Lin, K.C., Maryati, M., Masse, D., Pokarzhvskii, A., Rahman, H., Sabara, M.G., Salamon, J.A., Swift, M.J., Varela, A., Vasconcelos, H.L., White, D. And Zou, X.M. 2008. Global decomposition experiment shows soil animal impacts on decomposition are climate-dependent. Global Change Biology 14:1–17.
Powell, L.R., Berg, A.A., Johnson, D.L. and Warland, J.S. 2007. Relationships of pest grasshopper populations in Alberta, Canada to soil moisture and climate variables. Agricultural and Forest Meteorology 144: 73-84.
Sauchyn, D., Kulshreshtha, S., Barrow, E., Blair, D., Byrne, J., Davidson, D., Diaz, P., Henderson, N., Johnson, D., Johnston, M., Kienzle, S., Klaver, J., Thorpe, J., and Wheaton, E.   2008. The Prairies; in From Impacts to Adaptation: Canada in a Changing Climate 2007, edited by D.S. Lemmen, F.J. Warren, J., Lacroix and E. Bush; Government of Canada, Ottawa, ON.
Byrne, J., Kienzle, S., Johnson, D., Duke, G., Gannon, V., Selinger, B., and Thomas, J. 2006. Current and future water issues in the Oldman River Basin of Alberta, Canada. Water Science and Technology 53 (10): 327-334.
Entz, S.C., Kawchuk, L.M. and Johnson, D.L. 2006. Discovery of a North American genetic variant of the entomopathogenic fungus Metarhizium anisopliae var. anisopliae pathogenic to grasshoppers. BioControl (on-line, Part 1)
Nicholson, J., Gould, J., Golden, J., Hood, T., Johnson, D., Kissner, K., Stryker, W., and Hurlburt, D. 2006. Alberta Species at Risk Recovery Plan No. 11. Alberta Sustainable Resource Development, Fish and Wildlife Division. 21 pp.
Cárcamo, H. A., Dosdall, L., Johnson, D.L., and Olfert, O. 2005. Evaluation of foliar insecticides to control the cabbage seedpod weevil, Ceutorhynchus obstrictus Marsham in canola in southern Alberta, Canada. Canadian Entomologist 137: 476-487.
Danyk, T., Mackauer, M., and Johnson, D.L. 2005. Reduced food consumption in the grasshopper Melanoplus sanguinipes (Orthoptera: Acrididae) parasitized by Blaesoxipha atlanis (Diptera: Sarcophagidae). Canadian Entomologist 137: 356-366.
Danyk, T., Mackauer, M., and Johnson, D.L. 2005. The influence of host suitability on the range of grasshopper species utilized by Blaesoxipha atlanis (Diptera: Sarcophagidae) in the field. Bulletin of Entomological Research 95: 571-578.
Entz, S.C., Johnson, D.L., and Kawchuk, L.M. 2005. Development of a PCR-based diagnostic assay for the specific detection of the fungus Metarhizium anisopliae var. acridum in grasshoppers. Mycological Research 109: 1302-1312.
Gannon V.P.J., Duke, G.D., Thomas, J.E., VanLeeuwen, J., Byrne, J., Johnson, D., Kienzle, S.W., Little, J., Graham, T. and Selinger, B. 2005, Identifying bacterial loading irrigation and river segments in an agricultural watershed. Science of the Total Environment 348: 19-31
Peddle, D.R., Rabe, N.J., Soenen, S.A., and Johnson, D.L. 2005. Derivation of Topoclimatic Indices for Alpine Snowpack Analysis in Alberta Rocky Mountain Watersheds. In: International Proceedings, Canada-US Eastern Snow Conference. Waterloo ON, Canada, June 7-11, 2005 (refereed proceedings paper)
Duke, G.D., Kienzle, S.W., Johnson, D.L., Byrne, J.M. (in press) Incorporating ancillary data to refine anthropogenically modified overland flow paths. Hydrological Processes 20: 1827-1843.
Mündel, H.-H., Blackshaw, R.E. , Byers, J.R., Huang, H.C., Johnson, D.L., Keon, R., Kubik, J., McKenzie, R., Otto, B.,Roth, B., and Stanford, K. 2004. Safflower Production on the Canadian Prairies. Agriculture and Agri-Food Canada. Available on paper or http://res2.agr.ca/lethbridge/safflo/part1_e.htm
Duke, G.D., Kienzle, S.W., Johnson, D.L., and Byrne, J.M. 2003. Improving overland flow routing by incorporating ancillary road data into Digital Elevation Models. Journal of Spatial Hydrology 3: 23-49
Kuiken, T., Leighton, A., and Johnson, D.L. 2003. Grasshoppers in coyote scats. Blue Jay 61: 51-55.
Johnson, D.L., Smits, J.S., Jaronski, S.T., and Weaver, D.K. 2002. Assessment of health and growth of ring-necked pheasants following consumption of infected insects or conidia of entomopathogenic fungi, Metarhizium anisopliae var acridum and Beauveria bassiana, from Madagascar and North America. Journal of Toxicology and Environmental Health 65: 2145-2162.
Johnson, D.L., Majak, W., and Benn, M.H. 2001. Excretion of miserotoxin and detoxification of the aglycone by grasshoppers (Orthoptera: Acrididae). Phytochemistry 58: 739-742.
Lomer, C.J., Bateman, R.P., Johnson, D.L., Langewald, J., and Thomas, M.B. 2001. Biological control of locusts and grasshoppers. Annual Review of Entomology 46: 667-702.
Danyk, T., Johnson, D.L., and Mackauer, M. 2000. Parasitism of the grasshopper Melanoplus sanguinipes by a sarcophagid fly, Blaesoxipha atlanis: influence of solitary and gregarious development on host and parasitoid. Entomologia Experimentalis et Applicata 94: 259-268.
Martin, P.A., Johnson, D.L., Forsyth, D.J., and Hill, B. 2000. Effects of two grasshopper control insecticides on the food resources and reproductive success of two species of grassland songbird. Environmental Toxicology and Chemistry 19: 2987-2996.
Smits, J.E., Johnson, D.L., and Lomer, C. 1999. Pathological and physiological responses of ring-necked pheasant chicks following dietary exposure to the fungus Metarhizium flavoviride, a biocontrol agent for grasshoppers in Africa. Journal of Wildlife Diseases 35: 194-203.

Inglis, D.G., Johnson, D.L., Kawchuk, L.M., and Goettel, M.S. 1998. Effect of soil texture and soil sterilization on susceptibility of ovipositing grasshoppers to Beauveria bassiana. Journal of Invertebrate Pathology 71: 73-81.

Lactin, D.J., and Johnson, D.L. 1998. Convective heat loss and change in body temperature of grasshopper and locust nymphs: relative importance of wind speed, insect size and insect orientation. Journal of Thermal Biology 23: 5-13.

Lactin, D.J., and Johnson, D.L. 1998. Environmental, physical, and behavioural determinants of body temperature in grasshopper nymphs (Orthoptera: Acrididae). The Canadian Entomologist 130: 551-577.

Majak, W.M., Johnson, D.L., and Benn, M.H. 1998. Detoxification of 3-nitropropionic acid and karakin by melanopline grasshoppers. Phytochemistry 49: 419-422.

Martin, P.A., Johnson, D.L., Forsyth, D.J., and Hill, B.D. 1998. Indirect effects of the pyrethroid insecticide, deltamethrin on reproductive success of Chestnut-collared Longspurs. Ecotoxicology 7: 89-97.

Inglis, G.D., Johnson, D.L., Cheng, K-J., and Goettel, M.S. 1997. Use of pathogen combinations to overcome the constraints of temperature on entomopathogenic Hyphomycetes against grasshoppers. Biological Control 8: 143-152.

Inglis, G.D., Goettel, M.S., and Johnson, D.L. 1997. Field and laboratory evaluation of two conidial batches of Beauveria bassiana (Balsamo) Vuillemin against grasshoppers. The Canadian Entomologist 129: 171-186.

Johnson, D.L. 1997. Nosematidae and other Protozoa as agents for control of grasshoppers and locusts: current status and prospects. Memoirs of the Entomological Society of Canada 171: 375-389.

Johnson, D.L., and Dolinski, M.G. 1997. Attempts to increase the incidence and severity of infection of grasshoppers with the entomopathogen Nosema locustae (Microsporida: Nosematidae) by repeated field application. Memoirs of the Entomological Society of Canada 171: 391-400.

Lactin, D.J., Harris, P., Johnson, D.L., Wan, F.-H., and Thomas, A.G. 1997, Modelling and mapping geographic ranges to evaluate weed biocontrol agents: A case study using Altica carduorum (Coleoptera: Chrysomelidae) and Cirsium arvense (Asteraceae). Biocontrol Science and Technology 7: 657-670.

Inglis, G.D., Duke, G.M., Kanagaratnam, P., Johnson, D.L., Goettel, M.S. 1997, Persistence of Beauveria bassiana in soil following application of conidia through crop canopies. Memoirs of the Entomological Society of Canada 171: 253-263.

Lactin, D.J., and Johnson, D.L. 1997. Response of body temperature to solar radiation in restrained nymphal migratory grasshoppers (Orthoptera: Acrididae): Influence of orientation and body size. Physiological Entomology 22: 131-139.

Inglis, G.D., Goettel, M.S., and Johnson, D.L. 1996. Persistence of the entomopathogenic fungus, Beauveria bassiana, on phylloplanes of crested wheatgrass and alfalfa. Biological Control 3: 258-270.

Inglis, G.D., Johnson, D.L., and Goettel, M.S. 1996. An oil-bait bioassay method used to test the efficacy of Beauveria bassiana against grasshoppers. Journal of Invertebrate Pathology 67: 312-315.

Inglis, G.D., Johnson, D.L., and Goettel, M.S. 1996. Effect of bait substrate and formulation on infection of grasshopper nymphs by Beauveria bassiana. Biocontrol Science and Technology 6: 35-50.

Inglis, G.D., Johnson, D.L., and Goettel, M.S. 1996. Effects of temperature and sunlight on mycosis (Beauveria bassiana) (Hyphomycetes: Sympodulosporae) of grasshoppers under field conditions. Environmental Entomology: 26: 400-409.

Inglis, G.D., Johnson, D.L., and Goettel, M.S.. 1996. Effects of temperature and thermoregulation on mycosis by Beauveria bassiana in grasshoppers. Biological Control 7: 131-139.

Isman, M.B., Feng, R., and Johnson, D.L.. 1996. Detoxicative enzyme activities in five species of field-collected melanopline grasshoppers (Orthoptera: Acrididae). The Canadian Entomologist 128: 353-354.

Lactin, D.J., and Johnson, D.L. 1996. Behavioural optimization of body temperature by nymphal grasshoppers (Melanoplus sanguinipes, Orthoptera: Acrididae) in temperature gradients established using incandescent bulbs. Journal of Thermal Biology 21: 231-238.

Lactin, D.J., and Johnson, D.L. 1996. Effects of insolation and body orientation on internal thoracic temperature of nymphal Melanoplus packardii (Orthoptera: Acrididae). Environmental Entomology 25:423-429.

Martin, P.A., Johnson, D.L., and Forsyth, D.J. 1996. Effects of grasshopper control insecticides on survival and brain acetylcholinesterase of pheasant (Phasianus colchicus) chicks. Environmental Toxicology and Chemistry 15: 518-524.

Goettel, M.S., Johnson, D.L., and Inglis, G.D. 1995. The role of fungi in the biological control of grasshoppers. Conference Proceedings, presentation. Can. J. Bot. 73 (Suppl. 1): S1-S75.

Inglis, G.D., Goettel, M.S., and Johnson, D.L. 1995. Influence of ultraviolet light protectants on persistence of the entomopathogenic fungus, Beauveria bassiana. Biological Control 5: 581-590.

Inglis, G.D., Johnson, D.L., and Goettel, M.S. 1995. Effects of simulated rain on the persistence of Beauveria bassiana conidia on leaves of alfalfa and wheat. Biocontrol Science and Technology 5: 365-370.

Johnson, D.L., and Petkau, A.J. 1995. A likelihood ratio test for equality of deviations from randomness. Researches in Population Ecology 37: 203-209.

Lactin, D.J., Holliday, N.J., Johnson, D.L., and Craigen, R. 1995. Improved rate model of temperature-dependent development by arthropods. Environmental Entomology 24: 68-75.

Lactin, D.J., and Johnson, D.L. 1995. Temperature-dependent feeding of Melanoplus sanguinipes (Orthoptera: Acrididae) nymphs in laboratory trials. Environmental Entomology 24: 1291-1296.

Beaubien, E., and Johnson, D.L. 1994. Flowering phenology and weather in Alberta, Canada. International Journal of Biometeorology 38: 23-27.

Gregory, D.A., Johnson, D.L., and Thompson, B.H. 1993. The toxicity of bran baits, formulated with carbaryl, chlorpyrifos and dimethoate, on nontarget yellow mealworms (Tenebrio molitor). Journal of Agricultural Entomology 11: 85-94.

Johnson, D.L., and Goettel, M.S. 1993. Reduction of grasshopper populations following field application of the fungus Beauveria bassiana. Biocontrol Science and Technology 3: 165-175.

Gregory, D.A., Johnson, D.L., and Thompson, B.H. 1992. The impact of bran baits treated with the insecticides carbaryl, chlorpyrifos, and dimethoate on the survivorship and reproductive success of non-target mouse populations. Agriculture, Ecosystems and Environment 45: 95-103.

Gregory, D.A., Johnson, D.L., Thompson, B.H., and Richards, K.W. 1992. Laboratory evaluation of the effects of carbaryl and chlorpyrifos baits and sprays on Alfalfa Leafcutting Bees (Megachile rotundata F.). Journal of Agricultural Entomology 9: 109-115

Johnson, D.L. 1992. Ecology, biology, field experimentation and environmental impact. In: C. Lomer & C. Prior (eds). Biological Control of Locusts and Grasshoppers, CAB International, Wallingford, UK, pp. 267-278

(French edition: Johnson D.L. 1992. Biologie, écologie, essais sur le terrain et impact sur l'environment. Dans: Lutte biologique contre les acridiens, préparé par C. Lomer et C. Prior, pp. 269-280. CAB International, Wallingford, UK, et CIDA/ACDI, Hull, Canada)

Johnson, D.L., Goettel, M.S., Bradley, C., Bradley, van der Paauw, H., and Maiga, B. 1992. Field tests of the entomopathogenic fungus Beauveria bassiana against grasshoppers in Mali, West Africa, July, 1990. In: C. Lomer & C. Prior (eds). Biological Control of Locusts and Grasshoppers, CAB International, Wallingford, UK, pp. 296-310

(French edition: Johnson, D.L., Goettel, M.S., Bradley, C., van der Paauw, H., et Maiga, B. 1992. Essais en plein champ du champignon entomopathogéne Beauveria bassiana contre les criquets au Mali, en juillet 1990. Dans: Lutte biologique contre les acridiens, préparé par C. Lomer et C. Prior, pp. 298-313. CAB International, Wallingford, UK, et CIDA/ACDI, Hull, Canada)

Schaalje, G.B., Johnson, D.L., and van der Vaart, H.R. 1992. Application of competing risks theory to analysis of the effects of Nosema locustae and Nosema cuneatum on development and mortality of migratory locusts. Environmental Entomology 21: 939-948.

Johnson, D.L., and Proctor, H.C. 1991. Effects of predators on the sex ratio of the spider mite Panonychus ulmi (Acari: Tetranychidae). Canadian Journal of Zoology 69: 208-212.

Johnson, D.L. 1990. Influence of temperature on toxicity of two pyrethroids to grasshoppers (Orthoptera: Acrididae). Journal of Economic Entomology 83: 366-373.

Willms, W.D. and Johnson, D.L. 1990. Utilization of rough fescue and Parry oat grass by two grasshopper species and effect of leaf water content and stubble height. Environmental Entomology 19: 1103-1109.

Johnson, D.L. 1989. The effects of timing and frequency of application of Nosema locustae (Microspora: Microsporida) on the infection rate and activity of grasshoppers (Orthoptera: Acrididae). Journal of Invertebrate Pathology 54: 353-362.

Johnson, D.L. 1989. Spatial analysis of the relationship of grasshopper outbreaks to soil classification. In: Estimation and Analysis of Insect Populations. Lecture Notes in Statistics 55: 347-359 (Springer-Verlag).

Johnson, D.L. 1989. Spatial autocorrelation, spatial modelling, and improvements in grasshopper survey methodology. Canadian Entomologist 121: 579-588.

Schaalje, G.B., Stinner, R.L. and Johnson, D.L. 1989. Modelling insect populations affected by pesticides with application to pesticide efficacy trials. Ecological Modelling 47: 233-263.

Erlandson, M.A., Johnson, D.L. and Olfert, O.O. 1988. Entomophaga grylli infections in grasshopper (Orthoptera: Acrididae) populations in Saskatchewan and Alberta, 1985-1986. Canadian Entomologist 120: 205-209.

Johnson, D.L., Huang, H.C. and Harper, A.M. 1988. Mortality of grasshoppers [Orthoptera: Acrididae] inoculated with a Canadian isolate of the fungus Verticillium lecanii. Journal of Invertebrate Pathology 52: 335-342.

Johnson, D.L., and Worobec, A. 1988. Spatial and temporal computer analysis of insects and weather: grasshoppers and rainfall in Alberta. Memoirs of the Entomological Society of Canada 146: 33-48.

Hill, B.D., Inaba, D.J. and Johnson, D.L. 1987. On-target deposition of aerially applied deltamethrin. Journal of Environmental Science and Health B22: 601-617.

Hill, B.D. and Johnson, D.L. 1987. Persistence of deltamethrin and its isomers on pasture forage and litter. Journal of Agricultural and Food Chemistry 35: 373-378.

Johnson, D.L. and Henry, J.E. 1987. Low rates of insecticides and Nosema locustae (Microsporidia: Nosematidae) on baits applied to roadsides for grasshopper (Orthoptera: Acrididae) control. Journal of Economic Entomology 80: 685-689.

Johnson, D.L. and Muendel, H.-H. 1987. Grasshopper feeding rates, preferences, and growth on safflower. Annals of Applied Biology 111: 43-52.

Muendel, H.-H. and Johnson, D.L. 1987. Safflower susceptibility and response to feeding by grasshoppers. Annals of Applied Biology 111: 203-212.

Johnson, D.L., Hill, B.D., Hinks, C.F. and Schaalje, G.B. 1986. Aerial application of the pyrethroid deltamethrin for grasshopper (Orthoptera: Acrididae) control. Journal of Economic Entomology 79: 181-188.

Johnson, D.L. and Pavlikova, E. 1986. Reduction of consumption by grasshoppers (Orthoptera: Acrididae) infected with Nosema locustae Canning (Microsporidia: Nosematidae). Journal of Invertebrate Pathology 48: 232-238.

Schaalje, G.B., Charnetski, W.A. and Johnson, D.L. 1986. A comparison of estimators of the degree of insect control. Communications in Statistics: Simulations and Computations 15: 1065-1086.

Grace, B. and Johnson, D.L. 1985. The drought of 1984 in southern Alberta: its severity and effects. Canadian Water Resources Journal 10: 28-38.

Johnson, D.L. and Wellington, W.G. 1984. Simulation of the interactions of predatory Typhlodromus mites with the European red mite, Panonychus ulmi (Koch). Researches on Population Ecology 26: 30-50.

Johnson, D.L., 1983. On the relationship between the European red mite and apple leaf chlorophyll. Journal of the Entomological Society of British Columbia 80: 42-45.

Johnson, D.L. and Wellington, W.G. 1983. Dispersal of the collembolan, Folsomia candida Willem, as a function of age. Canadian Journal of Zoology 61: 2534-2538.

Johnson, D.L., Lovett Doust, J. and Eaton, G.W. 1982. The effect of European canker and its spatial pattern on four apple cultivars in British Columbia. Journal of Applied Ecology 19: 603-609.

Johnson, D.L., and Wellington, W.G. 1980. Predation of Apochthonius minimus (Pseudoscorpionida: Chthoniidae) on Folsomia candida (Collembola: Isotomidae). Predation rate and size-selection. Researches on Population Ecology 22: 339-352.

Johnson, D.L. and Wellington, W.G. 1980. Predation of Apochthonius minimus (Pseudoscorpionida: Chthoniidae) on Folsomia candida (Collembola: Isotomidae). Effects of predation on prey populations. Researches on Population Ecology 22: 353-365.

Johnson, D.L., and Wellington, W.G. 1980. Post-embryonic growth of the collembolans Folsomia candida and Xenylla grisea at three temperatures. Canadian Entomologist 112: 687-695.



 


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