Picture of Steve Shirtliffe

Steve Shirtliffe Professor

3D04 - Agriculture Building

Research Area(s)

  • Field crop agronomy
  • Weed ecology


Plant Sciences


Ph.D (University of Manitoba); M.Sc. (University of Manitoba); B.Sc. (University of Manitoba)

Selected Recent Publications

Haile, T. A., & Shirtliffe, S. J. 2014. Effect of harvest timing on dormancy induction in canola seeds. Weed Sci. Accepted.

Duddu, H.S.N. and Shirtliffe, S.J. 2014. Variation of seed dormancy and germination ecology of cowcockle (Vaccaria hispanica [P. Mill.] Rauschert). Weed Sci. Accepted.

Benaragama, D., Rossnagel, B. G., & Shirtliffe, S. J. 2014. Breeding for competitive and high yielding crop cultivars. Crop Science, In-press.

Haile, T. A., Gulden, R., & Shirtliffe, S. J. 2014. On-farm seed loss does not differ between windrowed and direct-harvested canola. Can. J. of Plant Sci. In-press.

Haile, T. A., Holzapfel, C. B. & Shirtliffe, S. J. 2014. Canola genotypes and harvest methods affect seedbank addition. Agron. J. 106:236–242.

Shirtliffe, S.J. and D. Benaragama. 2014. Sometimes you need a big hammer: Evaluating and appraising non-herbicidal weed control methods in an integrated weed management system. In Managing Energy, Nutrients, and Pests in Organic Field Crops. CRC Press.  Ralph Martin and R. Macrae Eds. pp. 150-168.

Benaragama, D., & Shirtliffe, S. J. 2013. Integrating cultural and mechanical methods for additive weed control in organic systems. Agron. J., 105, 1728-1734.

A. Légère, S.J. Shirtliffe, A. Vanase, R.H. Gulden. 2013. Extreme Grain-Based Cropping Systems:  When Herbicide-Free Weed Management Meets Conservation Tillage in Northern Climates. Weed Tech. 27: 204-211.

S.J. Shirtliffe and E. N. Johnson. 2012. Progress Towards No-till Organic Weed Control in Western Canada. Renew. Agric. Food Sys. 27: 60-67. (invited)

L. K. Fedoruk and S. J. Shirtliffe, 2011.  Herbicide Choice and Timing for Weed Control in Imidazolinone-Tolerant Lentil. Weed Technology25:620-625.

L. K. Fedoruk, E. N. Johnson, and S. J. Shirtliffe, 2011.  The Critical Period of Weed Control for Lentil in Western Canada. Weed Science59:517-526.

E. G. Lamb, S. J. Shirtliffe and W. E. May, 2011. Structural Equation Modeling in the Plant Sciences: An Example using Yield Components in Oat. Canadian Journal Plant Science91: 603-619.

J. M. Spies, T.D. Warkentin and S.J. Shirtliffe, 2011. Variation in Field Pea Cultivars for Basal Branching and Weed Competition. Weed Science59: 218-223.

N.J. Seerey, Shirtliffe, S. J. and Hucl, P., 2011. Seeds from Unthreshed Wheat (Triticum aestivum L.) Spikes have Reduced Field Emergence Compared with Threshed Seed Regardless of Cultivar.  Canadian Journal Plant Science91: 583-585.

E.N. Johnson, A.G. Thomas, J.Y. Leeson, S.J. Shirtliffe, and S.A. Brandt, 2011.  Mechanical Weed Control in Pulse and Cereal crops:  Is there a Fit in Large-Scale Western Canadian Agriculture? Pages 45-58 in Cloutier, D.C. and M.L. Leblanc, eds. Physical Weed Control: Progress and Challenges. Topics in Canadian Weed Science, Volume 6. Pinawa, Manitoba.

J.M. Baird, Walley, F. L., and S. J. Shirtliffe, 2010. Arbuscular Mycorrhizal Fungi Colonization and Phosphorus Nutrition in Organic Field Pea and Lentil.  Mycorrhizae20:541–549.

J.D. Knight, Buhler, R., Leeson, J. Y., and S. J. Shirtliffe, 2010. Classification and fertility status of organically managed fields across Saskatchewan, Canada. Canadian Journal Soil Science90: 667-678.

N.J. Seerey and Shirtliffe, S. J., 2010.  Commercial Generations of Brassica napus cause Greater Yield Loss in Triticum aestivum, than Volunteer B. napus Generations. Canadian Journal Plant Science, 90: 777-783.

J.M. Spies, Warkentin, T, and  Shirtliffe, S. J., 2010. Basal Branching in Field Pea Cultivars and Yield-Density Relationships.  Canadian Journal Plant Science90: 679-690.

Selected Awards

ASA Professor of the Year, 2008


AGRIC 111 Agricultural Science
PLSC 234 Weed Control in Organic Agriculture
PLSC 301 Principles of Agronomy
PLSC 340 Weed Biology
PLSC 401 Sustainable Crop Production
PLSC 898 Plant Population Biology