Dr. Debra McLaren

Image Debra Leigh McLaren
Research Scientist, Crop Production Pathology

Development of improved disease management strategies for the production of pulse and oilseed crops

Management of plant disease risk in diversified cropping systems

Current research and/or projects

  • Molecular diagnostic procedures for the rapid, specific and sensitive detection of root rot pathogens in symptomatic field pea, dry bean and soybean roots.

  • Determine the frequency and diversity of root rot pathogens in Canadian soybean crops.

  • Identification of the pathotypes of Phytophthora sojae and their distribution in western Canadian soybean crops.

  • Determine the impact of crop type and crop sequence on soybean root diseases.

  • Determine whether pathogen quantification in soil can predict root rot incidence of field pea and severity in the field

  • Assessment of canola diseases: surveillance and epidemiology – staying ahead of Important canola issues such as clubroot.

  • Develop agronomic management packages and diverse cropping sequences/ systems that reduce the impact of root diseases and improve net production returns.

Research and/or project statements

To increase productivity and competitiveness of agricultural production, this research program supports the Agro-Ecosystem Resilience sector science strategy through the development of new means to address management challenges from current and emerging plant pathogens.  

Professional activities / interests

  • Pulse crop pathology (field pea, dry bean)

  • Oilseed pathology (soybean, canola)

  • Crop production systems

  • Integrated pest management

  • Sustainable agriculture

Education and awards

Ph.D. University of Manitoba. Winnipeg, MB

Post Doctoral Fellowship. Agriculture and Agri-Food Canada. Beaverlodge, AB

Achievements in Plant Disease Management Award. Pulse Crop Research Team. 2016. Canadian Phytopathological Society.

Gold Harvest Award for Innovation, Collaboration and Service Excellence. 2017. Clubroot Risk Mitigation Initiative Team.

 

Key publications

  1. Khakbazan, M., Mohr, R.M., Huang, J., Xie, R., Volkmar, K.M., Tomasiewicz, D.J., Moulin, A.P., Derksen, D.A., Irvine, B.R., McLaren, D.L., Nelson, A. (2019). Effects of crop rotation on energy use efficiency of irrigated potato with cereals, canola, and alfalfa over a 14-year period in Manitoba, Canada, 195 http://dx.doi.org/10.1016/j.still.2019.104357

    2019 - View publication details

  2. Chatterton, S., Harding, M.W., Bowness, R., Mclaren, D.L., Banniza, S., Gossen, B.D. (2019). Importance and causal agents of root rot on field pea and lentil on the Canadian prairies, 2014–2017, 41(1), 98-114. http://dx.doi.org/10.1080/07060661.2018.1547792

    2019 - View publication details

  3. Chang, K.F., Hwang, S.F., Conner, R.L., Ahmed, H.U., Zhou, Q., Fu, H., Turnbull, G.D., Nyandoro, R., Strelkov, S.E., McLaren, D.L., Gossen, B.D. (2019). Effects of fusarium avenaceum and rhizoctonia solani on the growth of soybean in saline soils1, 99(2), 128-137. http://dx.doi.org/10.1139/cjps-2017-0371

    2019 - View publication details

  4. Khakbazan, M., Mohr, R.M., Huang, J., Campbell, E., Volkmar, K.M., Tomasiewicz, D.J., Moulin, A.P., Derksen, D.A., Irvine, B.R., McLaren, D.L., Nelson, A. (2018). Economic and Risk Effects of Rotation Based on a 14-Year Irrigated Potato Production Study in Manitoba, 95(3), 258-271. http://dx.doi.org/10.1007/s12230-017-9627-8

    2018 - View publication details

  5. Gossen, B.D., Chatterton, S., and McLaren, D.L. 2017. Distribution of root rot on pea and lentil crops on the Canadian prairies, 2016. Phytopathology 107 (S5): 105.

    2017 - View publication details

  6. Esmaeili Taheri, A., Chatterton, S., Foroud, N.A., Gossen, B.D., McLaren, D.L. (2017). Identification and community dynamics of fungi associated with root, crown, and foot rot of field pea in western Canada, 147(3), 489-500. http://dx.doi.org/10.1007/s10658-016-1017-4

    2017 - View publication details

  7. Esmaeili Taheri, A., Chatterton, S., Gossen, B.D., McLaren, D.L. (2017). Degenerate ITS7 primer enhances oomycete community coverage and PCR sensitivity to Aphanomyces species, economically important plant pathogens, 63(9), 769-779. http://dx.doi.org/10.1139/cjm-2017-0100

    2017 - View publication details

  8. Esmaeili Taheri, A., Chatterton, S., Gossen, B.D., McLaren, D.L. (2017). Metagenomic analysis of oomycete communities from the rhizosphere of field pea on the Canadian prairies, 63(9), 758-768. http://dx.doi.org/10.1139/cjm-2017-0099

    2017 - View publication details

  9. Esmaeili Taheri, A., Chatterton, S., Foroud, N. A., Gossen, B. D., and McLaren, D. L. 2016. Identity and host specificity of root rot pathogens of pea, wheat and canola colonizing standing pea stubble from the Canadian Prairies. Can. J. Plant Pathol. 38: 264.

    2016 - View publication details

  10. Henriquez, M.A., McLaren, D.L., Conner, R.L., Hwang, S.F., Chang, K.F., Strelkov, S.E., Gossen, B.D., Yu, K., Xue, A., Marchand, G., Henderson, T.L., Kerley, T.J., and Penner, W.C. 2016. Phytophthora stem and root rot of soybean in Manitoba: Isolation and race characterization. Poster AP17, Proc. 10th Can Pulse Res. Workshop, Winnipeg, MB, Oct. 27 28, 2016. p. 52.

    2016 - View publication details

  11. McLaren, D.L., Platford, R.G., Kubinec, A.M., Lindquist, N., Davies, H., Bisht, V., Bajracharya, P., Bargen, E., Brackenreed, A., Buss, T., Chomokovski, D., Farooq, A., Hausermann, D.J., Henderson, T.L., Jersak, S., Kaskiw, E., Kaskiw, L., Kristjanson, I., Lange, D., McCracken, M., Mitchell, L., McLennan, D., Picard, R., and Pradhan, M. (2016). "Survey of canola diseases in Manitoba in 2015.", Canadian Plant Disease Survey, 96.

    2016 - View publication details

  12. Gossen, B.D., Chatterton, S., Foroud, N., Esmaeili Taheri, A., and McLaren, D.L. 2016. Metagenomic analysis of oomycete communities in rhizosphere soil from field pea on the Canadian prairies using Illumina Miseq. Phytopathology 106 (S4): 160.

    2016 - View publication details

  13. Gossen, B.D., Conner, R.L., Chang, K.F., Pasche, J., McLaren, D.L., Henriquez, M.A., Chatterton, S., and Hwang, S.F. 2016. Identifying and managing root rot of pulses on the northern Great Plains. Plant Dis. 100: 1965-1978.

    2016 - View publication details

  14. McLaren, D.L., Henriquez, M.A., Kim, Y.M., Conner, R.L., Hwang, S.F., Chang, K.F., Mohr, R.M., and Strelkov, S.E. (2016). "Getting to the root of the problem: root diseases in Manitoba crops.", Manitoba Ag Days, Brandon, MB, Canada, January 21, 2016.

    2016 - View publication details

  15. Gossen, B.D., Conner, R.L., Chang, K.F., Pasche, J., McLaren, D.L., Henriquez, M.A., Chatterton, S., and Hwang, S.F. 2016. Identifying and managing root rot of pulses on the northern Great Plains. Plant Dis. 100: 1965 1978.

    2016 - View publication details

  16. Esmaeili Taheri, A., Chatterton, S., Foroud, N.A., Gossen, B.D., and McLaren, D.L. 2016. Modified ITS7 primer enhances oomycete richness detection and the amplification of economically important taxa. Mycol. Soc. Amer., August 7 11, Berkley, CA.

    2016 - View publication details

  17. Gossen, B.D., Chatterton, S., Conner, R.L., Chang, K.F., Pasche, J.S., McLaren, D.L., and Hwang, S.F. 2016. Root rot: An ongoing challenge to pulse production on the Prairies. Proc. 10th Can Pulse Res. Workshop, Winnipeg, MB, Oct. 27 28, 2016. p. 23.

    2016 - View publication details

  18. A. Esmaeili Taheri, S. Chatterton, N.A. Foroud, B.D. Gossen and D.L. McLaren. Metagenomic analysis of oomycete communities in rhizosphere soil from field pea on the Canadian prairies using Illumina Miseq. Annual Meeting of the American Phytopathology Society, Tampa FL, USA, July 30 – August 3, 2016. (poster presentation)

    2016 - View publication details

  19. Bing, D.J., Beauchesne, D., McLaren, D., Vera, C. (2016). AAC Radius field pea, 97(1), 196-198. http://dx.doi.org/10.1139/cjps-2016-0174

    2016 - View publication details

  20. Grant, C.A., O'Donovan, J.T., Blackshaw, R.E., Harker, K.N., Johnson, E.N., Gan, Y., Lafond, G.P., May, W.E., Turkington, T.K., Lupwayi, N.Z., McLaren, D.L., Zebarth, B., Khakbazan, M., St. Luce, M., Ramnarine, R. (2016). Residual effects of preceding crops and nitrogen fertilizer on yield and crop and soil N dynamics of spring wheat and canola in varying environments on the Canadian prairies, 192 86-102. http://dx.doi.org/10.1016/j.fcr.2016.04.019

    2016 - View publication details

Research facility

2701 Grand Valley Road, P.O. Box 1000A
Brandon, MB R7A 5Y3
Canada

Affiliations

Canadian Phytopathological Society, Member

Registrar's List of Experts for Seed and Variety Development and Evaluation in Canada, Member

Manitoba Clubroot Action Team, Member

Section Editor, Canadian Plant Disease Survey - Oilseeds, Pulses, Forages and Special Crops.

 

Language

English