Johnson, Eric, M.Sc., P.Ag.

Weed Biologist


Contact Information:

PO Box 10
Scott, Saskatchewan S0K 4A0
Telephone: 306-247-2011 ext. 23
Fax: 306-247-2022
Email: eric.johnson@agr.gc.ca

Areas of Expertise:

  • Pesticide Minor Use Research Trials
  • Chemical and Cultural Weed Management
  • Physical Weed Control

Current Projects:

  • Provide knowledge of weed biology, population dynamics, and community ecology as the basis for the development of integrated control strategies with reduced impact on the environment
  • Develop long term best management practices for weed control in cropping systems with limited environmental impact
  • Develop reduced risk technologies to provide improved weed management in agro-ecosystems
  • Pesticide Minor Use

Affiliations:

  • Second Vice-President, Canadian Weed Science Society
  • P.Ag., Saskatchewan Institute of Agrologists

Research Publications:

The links below lead to abstracts with access to full text.

2016

2015

2014

2013

2012

2011

2010

  • Johnson, E.N. and Holm, F.A. (2010). "Pre-emergence Mechanical Weed Control in Field Pea (Pisum sativum L.).", Canadian Journal of Plant Science, 90(1), pp. 133-138. doi : 10.4141/CJPS09049
  • Johnson, E.N., Gan, Y.T., May, W.E., Balasubramanian, P.M., Vera, C.L., Friesen, K., and Hermann, A. (2010). "Production of Selected Special Crops on the Canadian Great Plains.", in Malhi, S.S., Gan, Y., Schoenau, J.J., Lemke, R.L. and Liebig, M.A. (eds.) - Recent Trends in Soil Science and Agronomy Research in the Northern Great Plains of North America, Research Signpost, Trivandrum, India, Chapter 10.
  • Smith, E.G., Favret, M.L., Clayton, G.W., Blackshaw, R.E., Brandt, S.A., Johnson, E.N., Harker, K.N., O'Donovan, J.T., Kutcher, H.R., and Vera, C.L. (2010). "The profitability of seeding the F2 generation of hybrid canola.", Agronomy Journal, 102(2), pp. 598-605. doi : 10.2134/agronj2009.0101
  • Vera, C.L., Malhi, S.S., Phelps, S.M., May, W.E., and Johnson, E.N. (2010). "N, P, and S fertilization effects on industrial hemp in Saskatchewan.", Canadian Journal of Plant Science, 90(2), pp. 179-184. doi : 10.4141/CJPS09101

2009

Other Science Related Publications:

2015

  • Harker, K.N., O'Donovan, J.T., Blackshaw, R.E., Johnson, E.N., Pageau, D., Shirtliffe, S.J., Gulden, R.H., Rowsell, J., Hall, L.M., and Willenborg, C.J. (2015). "Cultural techniques for integrated wild oat management.", Canadian Weed Science Society Meeting, Edmonton, AB, Canada, November 23-26, 2015, Oral presentation. (Abstract)
  • Harker, K.N., O'Donovan, J.T., Turkington, T.K., Blackshaw, R.E., Lupwayi, N.Z., Smith, E.G., Johnson, E.N., Kutcher, H.R., Willenborg, C.J., Gan, Y.T., Dosdall, L.M., Hall, L.M., Peng, G., Irvine, R.B., and Mohr, R.M. (2015). "Sustainable canola production increases with cropping system diversity.", 14th International Rapeseed Congress, Saskatoon, SK, Canada, July 5-9, 2015. (Poster)
  • Mierau, A., Willenborg, C.J., Gulden, R.H., May, W.E., Weber, J., and Johnson, E.N. (2015). "Evaluating a two-pass herbicide system for managing glyphosate-resistant canola in glyphosate-resistant soybean crops.", Canadian Weed Science Society Conference, Edmonton, Alberta, Canada, November 25, 2015.
  • O'Donovan, J.T., Grant, C.A., Blackshaw, R.E., Harker, K.N., Johnson, E.N., Gan, Y.T., May, W.E., Turkington, T.K., Lupwayi, N.Z., Khakbazan, M., and Smith, E.G. (2015). "Legumes in rotation affect hybrid canola and malting barley.", 14th International Rapeseed Congress, Saskatoon, SK, Canada, July 5-9, 2015, Keynote Theme D oral presentation.
  • O'Donovan, J.T., Turkington, T.K., Harker, K.N., Oatway, L., Grant, C.A., Beres, B.L., Johnson, E.N., May, W.E., Izydorczyk, M.S., MacLeod, A., Anbessa, Y., and Vera, C.L. (2015). "Malting barley cultivar responses to increasing nitrogen rates in western Canada.", ASA-CSSA-SSSA International Annual Meeting: Synergy in Science. Partnering for Solutions, Minneapolis, MN, USA, November 15-18, 2015. (Poster)
  • Turkington, T.K., O'Donovan, J.T., Harker, K.N., Xi, K., Blackshaw, R.E., Johnson, E.N., Peng, G., Kutcher, H.R., May, W.E., Lafond, G.P., Mohr, R.M., and Irvine, R.B. (2015). "The impact of fungicide and herbicide timing on foliar disease severity, and barley productivity and quality.", XVIII International Plant Protection Congress (IPPC), Free University Berlin, Henry Ford Building, Berlin, Germany, August 24-27, 2015, ID: P HERBI 7. (Poster)

2014

  • Beckie, H.J., Gulden, R.H., Shaikh, N., Johnson, E.N., Willenborg, C.J., Brenzil, C.A., Shirriff, S.W., Lozinski, C., and Ford, G. (2014). "Glyphosate-resistant kochia in Saskatchewan and Manitoba.", 68th Annual Meeting of the Canadian Weed Science Society - Société canadienne de malherbologie, Montreal, QC, Canada, November 17-20, 2014. (Abstract)
  • Beckie, H.J., Johnson, E.N., Leeson, J.Y., Shirriff, S.W., and Kapiniak, A. (2014). "Evolution of acetyl-CoA carboxylase (ACC)-inhibitor resistance in wild oat (Avena fatua) in a long-term alternative cropping systems study.", 2014 Weed Science Society of America (WSSA) and the Canadian Weed Science Society (CWSS) Annual Meeting, Vancouver, B.C., Canada, February 3-6, 2014. (Abstract)
  • Blackshaw, R.E., Harker, K.N., O'Donovan, J.T., Johnson, E.N., Gan, Y.T., and Peng, G. (2014). "How frequently can oilseed rape be grown in sustainable cropping systems.", 13th Congress of European Society of Agronomy, Debrecen, Hungary, August 25-29, 2014, Available online at http://www.esa2014.hu/news/post-conference-updates-8.html, pp. 331-332. (Poster)
  • Fernando, W.G.D., Peng, G., Kirkham, C.L., Lange, R., Kutcher, H.R., McLaren, D.L., Johnson, E.N., and Turkington, T.K. (2014). "Blackleg and clubroot of canola - should we be concerned?", Crop Talk, Prince Albert, SK, Canada, March 21, 2014, Presentation.
  • Harker, K.N., O'Donovan, J.T., Turkington, T.K., Baron, V.S., Blackshaw, R.E., Hall, L.M., Johnson, E.N., Willenborg, C.J., Shirtliffe, S.J., Gulden, R.H., Kobler, J.F., and Pageau, D. (2014). "Delaying herbicide resistance with integrated wild oat (Avena fatua) management.", 2014 Weed Science Society of America (WSSA) and the Canadian Weed Science Society (CWSS) Annual Meeting, Vancouver, B.C., Canada, February 3-6, 2014. (Abstract)
  • Johnson, E.N., Leeson, J.Y., Lemke, R.L., Olfert, O.O., and Moulin, A.P. (2014). "Effect of Cropping Diversity and Input System on Weed Populations in an 18-Year Cropping System Study.", 10th European Weed Research WRS Workshop on Physical and Cultural Weed Control, Alnarp, Sweden, March 16-19, 2014. (Abstract)
  • O'Donovan, J.T., Blackshaw, R.E., Grant, C.A., Harker, K.N., Johnson, E.N., Gan, Y.T., Lafond, G.P., May, W.E., and Turkington, T.K. (2014). "Legume crops grown in rotation enhance canola and barley productivity in western Canada.", 13th Congress of European Society of Agronomy, Debrecen, Hungary, August 25-29, 2014, pp. 357-358.
  • O'Donovan, J.T., Edney, M.J., MacLeod, A., Turkington, T.K., Grant, C.A., Harker, K.N., Johnson, E.N., Lafond, G.P., May, W.E., Beres, B.L., Kabeta, Y., and Juskiw, P.E. (2014). "Response of new malting barley cultivars to increasing nitrogen rates in western Canada.", 13th Congress of European Society of Agronomy, Debrecen, Hungary, August 25-29, 2014, pp. 141-142. (Poster)
  • O'Donovan, J.T., Grant, C.A., Blackshaw, R.E., Harker, K.N., Johnson, E.N., Gan, Y.T., May, W.E., Lafond, G.P., Turkington, T.K., Lupwayi, N.Z., Khakbazan, M., and Smith, E.G. (2014). "Rotational Effects of Legumes and Non-Legumes on Hybrid Canola, and Malting Barley.", American Society of Agronomy Annual Meeting 2014, Long Beach, CA, USA, November 3-5, 2014.
  • Peng, G., Fernando, W.G.D., Kirkham, C.L., Lange, R., Kutcher, H.R., McLaren, D.L., Johnson, E.N., and Turkington, T.K. (2014). "Emerging disease issues with canola disease production - clubroot and blackleg.", Canola Discovery Forum, Saskatoon, SK, Canada, October 22-23, 2014.
  • Peng, G., Fernando, W.G.D., Kirkham, C.L., Lange, R., Kutcher, H.R., McLaren, D.L., Johnson, E.N., and Turkington, T.K. (2014). "Managing blackleg of canola in western Canada - "new" strategies against an old disease.", 11th Conference of the European Foundation for Plant Pathology, Cracow, Poland, September 8-13, 2014.
  • Séguin-Swartz, G.T., Beckie, H.J., Warwick, S.I., Roslinsky, V., Nettleton, J.A., Johnson, E.N., and Falk, K.C. (2014). "Pollen-mediated gene flow between glyphosate-resistant Brassica napus canola and B. juncea and B. carinata mustard crops under large-scale field conditions in Saskatchewan.", 2014 WSSA/CWSS Annual Meeting, Vancouver, B.C., Canada, February 3-6, 2014. (Abstract)

2013

  • Johnson, E.N. (2013). "Carinata agronomy and production research in Saskatchewan.", Carinata Day Producer Meeting, Swift Current, SK, Canada, March 26, 2013. (Presentation)
  • Johnson, E.N. (2013). "Mustard weed control: Are we making progress?", Saskatchewan Mustard Development Commission Annual Meeting, Saskatoon, SK, Canada, January 9, 2013. (Presentation)
  • Johnson, E.N. (2013). "Weed management.", published in Carinata: A Guide to Best Management Practices., 14 pages.
  • McAllister, T.A., He, M.L., McKinnon, J.J., Nair, J., Johnson, E.N., and Cheng, B.F. (2013). "Canola juncea - new meal in town.", Saskatchewan Beef and Forage Symposium, Saskatoon, SK, Canada, January 24, 2013. (Presentation)
  • O'Donovan, J.T., Grant, C.A., Blackshaw, R.E., Harker, K.N., Turkington, T.K., Johnson, E.N., Lafond, G.P., May, W.E., Gan, Y.T., Edney, M., and Juskiw, P.E. (2013). "Effect of legume crops grown two years prior to barley on malting barley yield and quality.", ASA/CSSA/SSSA International annual meeting: Water, Food, Energy and Innovation for a Sustainable World, Tampa, Florida, USA, November 3-6, 2013.
  • O'Donovan, J.T., Turkington, T.K., Edney, M., Juskiw, P.E., May, W.E., Grant, C.A., Smith, E.G., Harker, K.N., Johnson, E.N., Beres, B.L., Kadeta, Y., and Chapman, B. (2013). "Relative responses of malting barley varieties to increasing nitrogen rates.", 16th Australian Barley Technical Symposium, Melbourne, Australia, September 8-11, 2013, pp. 58.
  • O'Donovan, J.T., Turkington, T.K., Edney, M., Smith, E.G., Harker, K.N., Beres, B.L., Clayton, G.W., Brandt, S.A., Johnson, E.N., Lafond, G.P., May, W.E., Grant, C.A., McKenzie, R., Juskiw, P.E., Kadeta, Y., Stonehouse, K., and Chapman, B. (2013). "Varietal and agronomic impacts on malting barley yield and quality.", FarmTech 2013, Westin Hotel, Edmonton, AB, Canada, January 29-31, 2013.
  • Peng, G., Fernando, W.G.D., Kirkham, C.L., Lange, R., Kutcher, H.R., McLaren, D.L., Johnson, E.N., and Turkington, T.K. (2013). "Managing blackleg of canola - potential new tools.", Soils and Crops Workshop 2013, Prairieland Park, Saskatoon, SK, Canada, March 5-6, 2013.
  • Szmigielski, A.M., Schoenau, J.J., and Johnson, E.N. (2013). "Bioactivity and dissipation of pyroxasulfone herbicide in Saskatchewan soils.", 66th Annual Meeting of the Western Society of Weed Science, Catamaran Resort, San Diego, CA, USA, March 11-14, 2013. (Poster)

2012

  • Beaudoin, N., Sansoulet, J.B., Pattey, E., Grant, C.A., Blackshaw, R.E., Harker, K.N., Johnson, E.N., O'Donovan, J.T., and Gervois, S. (2012). "Adaptation de STICS à la culture de canola au Canada à partir du module colza en vue de simuler les émissions de N2O par ModuloSTICS.", IXe Séminaire du modèle de culture STICS, Sainte-Montaine, France, October 16-19, 2012. (Poster)
  • Johnson, E.N. (2012). "Efficacy of fall and spring applications of pyroxasulfone.", 9th Canadian Pulse Research Workshop, Niagara Falls Marriott Gateway, Niagara Falls, ON, Canada, November 6-12, 2012, pp. 57. (Poster)
  • Johnson, E.N. (Ed.) (2012). "Managing Herbicide-Resistant Weeds in Pulses.", PulsePoint, 12(1), pp. 8-9.
  • Johnson, E.N., Beckie, H.J., Hall, L.M., Laturnus, B.D., Willenborg, C.J., Sapsford, K.L., Schoenau, G.J., and Smizigielski, A.M. (2012). "The potential for Group 15 herbicides in managing herbicide resistant weeds in pulses.", 9th Canadian Pulse Research Workshop, Niagara Falls Marriott Gateway, Niagara Falls, ON, Canada, November 6-12, 2012, pp. 30.
  • Johnson, E.N., Beckie, H.J., Hall, L.M., Schoenau, J.J., Willenborg, C.J., Sapsford, K.L., and Vandenberg, A. (2012). "Minor Use and New Herbicides.", FarmTech 2012, Edmonton, AB, Canada, January 24-26, 2012. (Presentation)
  • Johnson, E.N., Beckie, H.J., Hall, L.M., Schoenau, J.J., Willenborg, C.J., Sapsford, K.L., and Vandenberg, A. (2012). "Progress in Managing Herbicide Resistant Weeds in Pulse Crops.", Pulse Days 2012, Saskatoon, SK, Canada, January 10, 2012. (Presentation)
  • Johnson, E.N., Beckie, H.J., Hall, L.M., Schoenau, J.J., Willenborg, C.J., Sapsford, K.L., and Vandenberg, A. (2012). "Progress in managing herbicide resistant weeds in pulses.", Pulse Science Cluster Scientific Meeting 2011, Radisson Hotel, Saskatoon, SK, Canada, November 17-18, 2011. (Abstract)
  • Johnson, E.N., Beckie, H.J., Willenborg, C.J., Sapsford, K.L., Vandenberg, A., Schoenau, J.J., Hall, L.M., and Laturnus, B.D. (2012). "Progress in managing herbicide resistance in pulse crops.", Pulse Science Cluster Scientific Meeting 2012, Niagara Falls Marriott Gateway, Niagara Falls, ON, Canada, November 5, 2012. (Presentation)
  • Johnson, E.N., Beckie, H.J., Willenborg, C.J., and Sapsford, K.L. (2012). "Progress in managing herbicide resistant weed in lentil.", 65th Annual Meeting of the Western Society of Weed Science, Peppermill Resort, Reno, NV, USA, March 12-15, 2012. (Abstract)
  • Johnson, E.N., Falk, K.C., and Cote, J. (2012). "Opportunities for Ethiopian Mustard.", Western Canadian Crop Production Show 2012, Saskatoon, SK, Canada, January 9, 2012. (Poster)
  • Johnson, E.N., Hall, L.M., Laturnus, B.D., Beckie, H.J., Sapsford, K.L., and Willenborg, C.J. (2012). "Pyroxasulfone application timing and efficacy on cleavers (Galium aparine) and wild oats (Avena fatua).", Canadian Weed Science Society 66th Annual Meeting, Fairmont Hotel, Winnipeg, MB, Canada, November 12-15, 2012, pp. 18. (Abstract)
  • Johnson, E.N., Sapsford, K.L., Willenborg, C.J., Hall, L.M., Topinka, A.K., Juras, L.T., Degenhardt, R.F., Hamman, W.M., and Nybo, B.X. (2012). "Broadleaf herbicide tolerance in Brassica carinata.", 2012 Western Society of Weed Science Annual Meeting, Reno, NV, USA, March 12-14, 2012. (Poster)
  • Laturnus, B.D., Hall, L.M., Johnson, E.N., Beckie, H.J., Sapsford, K.L., Willenborg, C.J., and Raatz, L.L. (2012). "Pyroxasulfone and sulfentrazone efficacy on cleavers (Galium aparine) and wild oats (Avena fatua).", Pulse Science Cluster Scientific Meeting 2012, Niagara Falls Marriott Gateway, Niagara Falls, ON, Canada, November 5, 2012. (Presentation)
  • Pajic, V., Holm, F.A., Sapsford, K.L., Johnson, E.N., and Vandenberg, A. (2012). "Developing sulfentrazone and fluthiacet-methyl tolerance in lentil.", 9th Canadian Pulse Research Workshop, Niagara Falls Marriott Gateway, Niagara Falls, ON, Canada, November 6-12, 2012, pp. 41. (Poster)
  • Peng, G., Fernando, W.G.D., Kirkham, C.L., Lange, R., Kutcher, H.R., McLaren, D.L., Johnson, E.N., and Turkington, T.K. (2012). "Mitigating the risk of blackleg disease of canola using fungicide strategies.", Soils and Crops Workshop 2012, Universtiy of Saskatchewan, Saskatoon, SK, Canada, March 13-14, 2012, [CD], 7 pages.
  • Sapsford, K.L., Johnson, E.N., and Vandenberg, A. (2012). "Searching for improved lentil tolerance to ppo inhibitor herbicides.", 2012 Western Society of Weed Science Annual Meeting, Reno, NV, USA, March 12-14, 2012. (Abstract)
  • Sapsford, K.L., Willenborg, C.J., Johnson, E.N., and Beckie, H.J. (2012). "Group 2 (ALS) resistant cleavers (Galium aparine / Galium spurium) control in field peas (Pisum sp.).", 9th Canadian Pulse Research Workshop, Niagara Falls Marriott Gateway, Niagara Falls, ON, Canada, November 6-12, 2012, pp. 57. (Poster)

2011

  • Beckie, H.J., Warwick, S.I., Johnson, E.N., and Falk, K.C. (2011). "Gene flow between canola and mustard in Saskatchewan, Canada.", Canadian Weed Science Society 65th Annual Meeting, Marriott Gateway on the Falls, Niagara Falls, ON, Canada, November 21-24, 2011, pp. 58. (Poster)
  • Blackshaw, R.E., Hao, X., Clayton, G.W., Harker, K.N., O'Donovan, J.T., Johnson, E.N., and Vera, C.L. (2011). "Canola response to polymer-coated urea versus urea in a four-year zero-tillage cropping system on the Canadian prairies.", 13th International Rapeseed Congress, Prague, Czech Republic, June 5-9, 2011, pp. 61-64.
  • Fedoruk, L.K., Shirtliffe, S.J., and Johnson, E.N. (2011). "Utilizing the Critical Period of Weed Control Concept to Optimize Herbicide Timing in Lentil.", 51st Meeting Weed Science Society of America, Hilton Portland & Executive Tower Hotel, Portland, OR, USA, February 7-10, 2011. (Presentation)
  • Harker, K.N., Brandt, S.A., O'Donovan, J.T., Blackshaw, R.E., Johnson, E.N., and Kutcher, H.R. (2011). "The Impact of Two Years of Wild Oat Management After Four Years of Low Crop Inputs in Barley and Canola.", 51st Meeting Weed Science Society of America, Hilton Portland & Executive Tower Hotel, Portland, OR, USA, February 7-10, 2011, pp. 62. (Presentation)
  • Harker, K.N., Turkington, T.K., O'Donovan, J.T., Kutcher, H.R., and Johnson, E.N. (2011). "Barley Herbicide and Fungicide Tank-Mixtures?", Canadian Weed Science Society 65th Annual Meeting, Marriott Gateway on the Falls, Niagara Falls, ON, Canada, November 21-24, 2011, pp. 46. (Abstract)
  • Harker, K.N., Turkington, T.K., O'Donovan, J.T., Kutcher, H.R., and Johnson, E.N. (2011). "Barley Herbicide and Fungicide Tank-Mixtures?", Canadian Weed Science Society 65th Annual Meeting, Marriott Gateway on the Falls, Niagara Falls, ON, Canada, November 24, 2011. (Presentation)
  • Isidro, J., Singh, A.K., Wang, H., DePauw, R.M., Pozniak, C.J., Knox, R.E., Cuthbert, R.D., Beres, B.L., and Johnson, E.N. (2011). "Effects of plant density on durum crop production.", 1st Canadian Wheat Symposium, Winnipeg, MB, Canada, November 30-December 2, 2011.
  • Johnson, E.N. (2011). "Breeders excited with performance of new mustard.", Western Producer(Sept. 15).
  • Johnson, E.N. (2011). "Breeders excited with performance of new mustard.", SaskMustard, Mustard Field Day, Swift Current, SK, Canada, July 12, 2011. (Presentation)
  • Johnson, E.N. (2011). "Controlling Weeds in Pulses in 2011.", PulsePoint, 11(1), pp. 3-4.
  • Johnson, E.N., Beckie, H.J., Hall, L.M., Schoenau, J.J., Willenborg, C.J., Sapsford, K.L., and Vandenberg, A. (2011). "Progress in managing herbicide resistant weeds in pulses.", Canadian Weed Science Society 65th Annual Meeting, Marriott Gateway on the Falls, Niagara Falls, ON, Canada, November 21-24, 2011.
  • Johnson, E.N., Beckie, H.J., Hall, L.M., Schoenau, J.J., Willenborg, C.J., and Sapsford, K.L. (2011). "Progress in Managing Herbicide Resistant Weeds in Pulse Crops.", Canadian Weed Science Society 65th Annual Meeting, Marriott Gateway on the Falls, Niagara Falls, ON, Canada, November 21-24, 2011, pp. 48-49. (Abstract)
  • Johnson, E.N., Beckie, H.J., Holm, F.A., Sapsford, K.L., and Vandenberg, A. (2011). "Weed control challenges in pulses in 2011.", Pulse Days 2011, Saskatoon, SK, Canada, January 11, 2011. (Presentation)
  • Johnson, E.N., Brandt, S.A., Hall, L.M., and Smith, E.G. (2011). "Agronomic challenges and opportunities for second generation crops with novel traits and new crops.", in Beckie, H.J. and Hall , L.M. (eds.) - Topics in Canadian Weed Science, Vol. 8. New Crops and Crops with Second-Generation Traits: Weed Management Challenges, Canadian Weed Science Society – Société canadienne de malherbologie, Pinawa, MB, pp. 31-48.
  • Johnson, E.N., Falk, K.C., and Ramsey, S. (2011). "Oilseeds of the future.", Crop Production Show, Saskatoon, SK, Canada, January 10, 2011. (Poster)
  • Légère, A., Beckie, H.J., Hrynewich, B.L., Lozinski, C., Johnson, E.N., Warwick, S.I., and Stevenson, C. (2011). "Kochia with ALS (AHAS) Mutations: More on the Manitoba Conundrum.", 51st Meeting Weed Science Society of America, Hilton Portland & Executive Tower Hotel, Portland, OR, USA, February 7-10, 2011. (Presentation)
  • O'Donovan, J.T., Blackshaw, R.E., Grant, C.A., Harker, K.N., Lafond, G.P., Johnson, E.N., Gan, Y.T., May, W.E., Turkington, T.K., and Lupwayi, N.Z. (2011). "Legume Crops to Improve Soil Fertility for Enhanced Canola Production.", 2011 ASA-CSSA-SSSA International Annual Meeting: Fundamental for life: soil, crop and environmental sciences, San Antonio, TX, USA, October 16-19, 2011. (Poster)
  • Sapsford, K.L., Johnson, E.N., and Vandenberg, A. (2011). "Searching for improved lentil tolerance to PPO Inhibitor (Group 14) herbicides.", Canadian Weed Science Society 65th Annual Meeting, Marriott Gateway on the Falls, Niagara Falls, ON, Canada, November 21-24, 2011, pp. 48. (Abstract)
  • Turkington, T.K., Kutcher, H.R., Xi, K., Harker, K.N., O'Donovan, J.T., and Johnson, E.N. (2011). "The impact of fungicide and herbicide timing on barley leaf disease severity, weed management and crop productivity.", The Western Producer, 101(6), pp. S180. (Abstract)

2010

  • Bailey, K.L., Boyetchko, S.M., Peng, G., Hynes, R.K., Erlandson, M.A., and Johnson, E.N. (2010). "Development of biopesticides for weeds, insects, and diseases.", Manitoba Weed Supervisors Association meeting, Russell, MB, Canada, April 9, 2010. (Presentation)
  • Bailey, K.L., Boyetchko, S.M., Peng, G., Hynes, R.K., Erlandson, M.A., and Johnson, E.N. (2010). "Development of biopesticides for weeds, insects, and diseases.", Saskatchewan Alfalfa Seed Producers Association (SASPA): 2010 Saskatchewan Alfalfa Seed Producers Conference, Radisson Hotel, Saskatoon, SK, Canada, January 15-16, 2010.
  • Blackshaw, R.E., Brandt, S.A., Johnson, E.N., Harker, K.N., O'Donovan, J.T., Turkington, T.K., and Kutcher, H.R. (2010). "Which crop inputs have the greatest impact on canola yield?", 2010 ASA-CSSA-SSSA International Annual Meeting, Long Beach Convention Center, Long Beach, CA, USA, October 31-November 4, 2010. (Abstract)
  • Blackshaw, R.E., Harker, K.N., O'Donovan, J.T., Johnson, E.N., Kutcher, H.R., and Hao, X. (2010). "ESN effects on canola establishment, weed competition and canola yield in a four-year study.", 2010 ASA-CSSA-SSSA International Annual Meeting, Long Beach Convention Center, Long Beach, CA, USA, October 31-November 4, 2010.
  • Johnson, E.N. (2010). "Developing Agronomic Packages for New Crops and 2nd Generation Crops with Novel Traits: Constraints and Opportunities.", Canadian Weed Science Society 64th Annual Meeting, Delta Regina, Regina, SK, Canada, November 15-18, 2010.

2009

  • Bailey, K.L., Derby, J.-A., and Johnson, E.N. (2009). "Can the bioherbicide Phoma macrostoma control agricultural weeds?", Canadian Weed Science Society 63rd Annual Meeting, Delta Prince Edward, Charlottetown, PEI, Canada, November 24-26, 2009.
  • Bailey, K.L., Derby, J.-A., and Johnson, E.N. (2009). "Can the bioherbicide Phoma macrostoma control agricultural weeds?", Field Days 2009: Organic Research Update, University of Saskatchewan, Saskatoon, SK, Canada, October 27, 2009.
  • Bailey, K.L., Derby, J.-A., and Johnson, E.N. (2009). "Can the bioherbicide Phoma macrostoma control agricultural weeds?", University of Saskatchewan Research Update, University of Saskatchewan, Saskatoon, SK, Canada, December 16, 2009. (Presentation)
  • Barker, B., Johnson, E.N., and Blackshaw, R.E. (2009). "An innovative approach to innovative chemistry.", Top Crop Manager (Western edition), 2009(November), pp. 48-49.
  • Beckie, H.J., Johnson, E.N., Blackshaw, R.E., and Gan, Y.T. (2009). "Weed suppression by canola and mustard cultivars.", 8th European Weed Research Society (EWRS) Workshop on Physical and Cultural Weed Control, Zaragoza, Spain, March 9-11, 2009, pp. 2. (Abstract)
  • Brandt, S.A., Harker, N., O'Donovan, J.T., Kutcher, H.R., Clayton, G.W., Lupwayi, N.Z., Turkington, T.K., Kapiniak, A., and Johnson, E.N. (2009). "The role of inputs in a canola-barley rotation: results of a 4-year study.", - 2008 Canola Trials: Studies conducted under the AAFC-Prairie Canola Agronomic Research (PCAR) Agreement, Agriculture and Agri-Food Canada (AAFC)/Agriculture et Agroalimentaire Canada (AAC), pp. 91-142.
  • Frick, B.L., Harker, N., Johnson, E.N., Shirtliffe, S.J., Bailey, K.L., Leeson, J.Y., Wolf, T.M., and Nelson, A. (2009). "Organic Weed Management: A prairie research fly-by.", Organic Cereals Research Symposium, Banff Centre, Banff, AB, Canada, February 22-23, 2009.
  • Harker, K.N., Brandt, S.A., Johnson, E.N., O'Donovan, J.T., Blackshaw, R.E., Turkington, T.K., and Kutcher, H.R. (2009). "Input reduction impacts on weeds and crops in barley (Hordeum vulgare) and canola (Brassica napus).", 49th Annual Meeting of the Weed Science Society of America (WSSA), Hilton in the Walt Disney World Resort, Orlando, FL, USA, February 9-13, 2009, Abstract #507, pp. 1. (Abstract)
  • Harker, K.N., Brandt, S.A., O'Donovan, J.T., Blackshaw, R.E., Johnson, E.N., Turkington, T.K., Kutcher, H.R., and Clayton, G.W. (2009). "Wild oat populations after four years in a low-input barley-canola rotation.", Canadian Weed Science Society 63rd Annual Meeting, Delta Prince Edward, Charlottetown, PEI, Canada, November 24-26, 2009.
  • Johnson, E.N., Blackshaw, R.E., Holm, F.A., and Sapsford, K.L. (2009). "Broad-spectrum weed control in pulse crops with saflufenacil and sulfentrazone.", Canadian Weed Science Society 63rd Annual Meeting, Delta Prince Edward, Charlottetown, PEI, Canada, November 24-26, 2009, pp. 1. (Poster)
  • Sapsford, K.L., Holm, F.A., Johnson, E.N., and Beckie, H.J. (2009). "Control of group 2 (ALS) resistant kochia (Kochia scoparia) in spring wheat (Triticum aestivum).", Canadian Weed Science Society 63rd Annual Meeting, Delta Prince Edward, Charlottetown, PEI, Canada, November 24-26, 2009. (Abstract)
  • Sapsford, K.L., Holm, F.A., Johnson, E.N., and Beckie, H.J. (2009). "Control of group 2 (ALS) resistant kochia (Kochia scoparia) in spring wheat (Triticum aestivum).", Pesticide Resistance Workshop: Understanding pesticides, mechanisms of resistance and how to deal with resistance, University of Saskatchewan, Saskatoon, SK, Canada, February 25, 2009. (Workshop)
  • Sapsford, K.L., Holm, F.A., Johnson, E.N., and Beckie, H.J. (2009). "Control of group 2 (ALS) resistant kochia (Kochia scoparia) in spring wheat (Triticum aestivum).", Soils and Crops Workshop 2009, Western College of Veterinary Medicine, Saskatoon, SK, Canada, February 25-26, 2009. (Workshop)
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