Francois Tardif

Francois Tardif
Professor

Email: 

Phone: 

(519) 824-4120 x53395

Fax: 

(519) 763-8933

Education: 

B.Sc.A, Laval University;
M.Sc. Laval University;
Ph.D. Laval University

Location: 

Room: 

320 CRSC

My main interest is currently in the understanding of herbicide resistance in weeds. This includes topics such as:

•Characterization of new cases
•Development of diagnostic tools
•Understanding the effect of resistance mutations on fitness
•Developing management programs

Courses: 

Selected Publications: 

Moretti, M.L., C.R. Van Horn, R. Robertson, K. Segobye, S.C. Weller, B.G. Young, W.G. Johnson, R. Douglas Sammons, D. Wang, X. Ge, A. d' Avignon, T.A. Gaines, P. Westra, A.C. Green, T. Jeffery, M.A. Lespérance, F.J. Tardif, P.H. Sikkema, J.C. Hall, M.D. McLean, M.B. Lawton and B. Schulz. (2017). Glyphosate resistance in Ambrosia trifida: Part 2. Rapid response physiology and non-target-site resistance. Pest Management Science. DOI: 10.1002/ps.4569.

Van Horn, C.R., M.L. Moretti, R.R. Robertson, K. Segobye, S.C. Weller, B.G. Young, W.G. Johnson, B. Schulz, A.C. Green, T. Jeffery, M.A. Lespérance, F.J. Tardif, P.H. Sikkema, J.C. Hall, M.D. McLean, M.B. Lawton, R.D. Sammons, D. Wang, P. Westra and T.A. Gaines. (2017). Glyphosate resistance in Ambrosia trifida: Part 1. Novel rapid cell death response to glyphosate. Pest Management Science. DOI: 10.1002/ps.4567.

Belfry, K.D., M.J. Cowbrough, F.J. Tardif and P.H. Sikkema. (2016). Weed management options for conventional soybean. Canadian Journal of Plant Science. 96 (5). DOI: 10.1139/cjps-2015-0353.  

Ditschun, S., N. Soltani, D.E. Robinson, F.J. Tardif, A.C. Kaastra and P.H. Sikkema. (2016). Control of glyphosate-resistant giant ragweed (Ambrosia trifida L.) with isoxaflutole and metribuzin tankmix. American Journal of Plant Sciences. 7: 916-927.

Ditschun, S., N. Soltani, D.E. Robinson, F.J. Tardif, A.C. Kaastra and P.H. Sikkema. (2016). Control of glyphosate-resistant Canada fleabane [Conyza canadensis (L.) Cronq.] with isoxaflutole and metribuzin tank mix. Canadian Journal of Plant Science. 96: 72-80.

Dumont, M., J. Letarte and F.J. Tardif. (2016). Identification of a psbA mutation (valine219 to isoleucine) in Amaranthus powellii (S. Wats.) conferring resistance to linuron. Weed Science. 64: 6-11.

Robinson, M.A., J. Letarte, M.J. Cowbrough, P.H. Sikkema and F.J. Tardif. (2015). Winter wheat (Triticum aestivum L.) response to herbicides as affected by application timing and temperature. Canadian Journal of Plant Science. 95 (2): 325-333. DOI: 10.4141/cjps-2014-109.

Robinson, M.A., J. Letarte, M.J. Cowbrough, P.H. Sikkema and F.J. Tardif. (2014). Response of underseeded red clover (Trifolium pratense L.) to winter wheat (Triticum aestivum L.) herbicides as affected by application timing. Agricultural Sciences. 5: 1351-1360. DOI: 10.4236/as.2014.513145.

Mahoney, K.J., F.J. Tardif, D.E. Robinson, R.E. Nurse and P.H. Sikkema. (2014). Tolerance of soybean (Glycine max L.) to protoporphyrinogen oxidase inhibitors and very long chain fatty acid synthesis inhibitors applied preemergence. American Journal of Plant Sciences. 5: 1117-1124.

Follings, J., N. Soltani, D. Robinson, F. Tardif, M. Lawton and P. Sikkema. (2013). Distribution of glyphosate and cloransulam-methyl resistant giant ragweed (Ambrosia trifida L.) populations in southern Ontario. Agricultural Sciences. 4: 570-576. DOI: 10.4236/as.2013.410077.

Byker, H. P., N. Soltani, D.E. Robinson, F.J. Tardif, M.B. Lawton and P.H. Sikkema. (2013). Glyphosate resistant Canada fleabane (Conyza canadensis (L). Cronq.): dose response to glyphosate and control with postemergence herbicides in soybean (Glycine max. (L). Merr.) in Ontario. Canadian Journal of Plant Science. 93: 1187-1193.

Follings, J., N. Soltani, D.E. Robinson, F.J. Tardif, M.B. Lawton and P.H. Sikkema. (2013). Glyphosate resistant giant ragweed (Ambrosia trifida L.): 2,4-D dose response and control with postemergence herbicides in soybean. American Journal of Plant Science. 4: 1790-1798.

Byker, H.P., N. Soltani, D.E. Robinson, F.J. Tardif, M.B. Lawton and P.H. Sikkema. (2013). Occurrence of glyphosate and cloransulam resistant Canada fleabane (Conyza canadensis L. Cronq.) in Ontario. Canadian Journal of Plant Science. 93: 851-855.

Byker, H.P., N. Soltani, D.E. Robinson, F.J. Tardif, M.B. Lawton and P.H. Sikkema. (2013). Control of glyphosate-resistant horseweed (Conyza canadensis) with dicamba applied preplant and postemergence in dicamba-resistant soybean. Weed Technology. 27: 492-496.

Byker, H.P., N. Soltani, D.E. Robinson, F.J. Tardif, M.B. Lawton and P.H. Sikkema. (2013). Control of glyphosate resistant Canada fleabane [Conyza canadensis (L.) Cronq.] with preplant herbicide tankmixes in soybean [Glycine max. (L). Merr.]. Canadian Journal of Plant Science. 93: 659-667.

Follings, J., N. Soltani, D.E. Robinson, F.J. Tardif, M.B. Lawton and P.H. Sikkema. (2013). Control of glyphosate resistant giant ragweed in soybean with preplant herbicides. Agricultural Sciences. 4: 195-205.

Robinson, M.A., M.J. Cowbrough, P.H. Sikkema and F.J. Tardif. (2013). Winter wheat (Triticum aestivum L.) tolerance to mixtures of herbicides and fungicides applied at different timings. Canadian Journal of Plant Science. 93: 491-501.

Vink, J.P., N. Soltani, D.E. Robinson, F.J. Tardif, M.B. Lawton and P.H. Sikkema. (2012). Glyphosateresistant giant ragweed (Ambrosia trifida) control in dicamba-tolerant soybean. Weed Technology. 26: 422-428. DOI: 10.1614/WT-D-11-00184.

Vink, J.P., N. Soltani, D.E. Robinson, F.J. Tardif, M.B. Lawton and P.H. Sikkema. (2012). Glyphosateresistant giant ragweed (Ambrosia trifida L.) control with preplant herbicides in soybean (Glycine max L.). Canadian Journal of Plant Science. 92: 913-922. DOI: 10.4141/cjps2012-025.

Vink, J.P., N. Soltani, D.E. Robinson, F.J. Tardif, M.B. Lawton and P.H. Sikkema. (2012). Glyphosateresistant giant ragweed (Ambrosia trifida L.) in Ontario: Dose response and control with postemergence herbicides. American Journal of Plant Science. 3: 608-617.

Vink, J.P., N. Soltani, D.E. Robinson, F.J. Tardif, M.B. Lawton and P.H. Sikkema. (2012). Occurrence and distribution of glyphosate-resistant giant ragweed (Ambrosia trifida L.) in southwestern Ontario. Canadian Journal of Plant Science. 92: 533-539.

Beckie, H.J. and F.J. Tardif. (2012). Herbicide cross resistance in weeds. Crop Protection. 35: 15-28.

Ashigh, J. and F.J. Tardif. (2011). Water and temperature stress impact fitness of acetohydroxyacid synthase-inhibiting herbicide-resistant populations of eastern black nightshade (Solanum ptychanthum). Weed Science. 9: 341-348.

Soltani, N., H.R. Mashhadi, M.B. Mesgaran, M. Cowbrough, F.J. Tardif, K. Chandler, R.E. Nurse, C.J. Swanton and P.S. Sikkema. (2011). The effect of residual corn herbicides on injury and yield of soybean seeded in the same season. Canadian Journal of Plant Science. 91: 571-576.

Wilson, G.C., N. Soltani, F.J. Tardif, C.J. Swanton and P.H. Sikkema. (2010). Control of volunteer cereals with post-emergence herbicides in maize (Zea mays L.). Crop Protection. 29: 1389-1395.

Wilson, G.C., N. Soltani, C.J. Swanton, F.J. Tardif, D.E. Robinson and P.H. Sikkema. (2010). Volunteer wheat (Triticum aestivum L.) competition in corn (Zea mays L.). Canadian Journal of Plant Science. 90: 919- 924.

Nurse, R. E., A.S. Hamill, C.J. Swanton, F.J. Tardif and P.H. Sikkema. (2010). Weed control and yield response to mesotrione in maize (Zea mays). Crop Protection. 29: 652-657.

Gulden, R.H., P.H. Sikkema, A.S. Hamill, F. Tardif and C.J. Swanton. (2009). Conventional vs. glyphosate resistant cropping systems in Ontario: weed control, diversity, and yield. Weed Science. 57: 665-672.

Ashigh, J., C.A.L. Corbett, P.J. Smith, J. Laplante and F.J. Tardif. (2009). Characterization and diagnostic tests of resistance to acetohydroxyacid synthase inhibitors due to an Asp376Glu substitution in Amaranthus powellii. Pesticide Biochemistry and Physiology. DOI: 10.1016/j.pestbp.2009.06.002.

Ashigh, J, and F.J. Tardif. (2009). An amino acid substitution at position 205 of acetohydroxyacid synthase reduces fitness under optimal light in resistant populations of Solanum ptychanthum. Weed Research. DOI: 10.1111/j.1365-3180.2009.00717x.

Laplante, J., I. Rajcan and F.J. Tardif. (2009). Multiple allelic forms of acetohydroxyacid synthase are responsible for herbicide resistance in Setaria viridis. Theoretical and Applied Genetics. DOI: 10.1007/s00122-009-1067-5.

Kaastra, A.C., C.J. Swanton, F.J. Tardif and P.H. Sikkema. (2008). Two-way performance interactions among HPPD- and ALS-inhibiting herbicides. Weed Science. 56: 841-851.

Corbett, C.A.L and F.J. Tardif. (2008). Detection of resistance to acetohydroxyacid synthase inhibitors in Amaranthus sp. using DNA polymorphisms. Pesticide Biochemistry and Physiology. 92: 48-55.

Elford, E.M.A., F.J. Tardif, D. Robinson and E.M. Lyons. (2008). The effect of perennial ryegrass overseeding on weed suppression and sward composition. Weed Technology. 22: 231-239.

Ashigh, J., I. Rajcan and F.J. Tardif. (2008). Genetics of resistance to acetohydroxyacid synthase inhibitors in populations of eastern black nightshade (Solanum ptychanthum) from Ontario. Weed Science. 56: 210-215.

Ashigh, J. and F.J. Tardif. (2007). An Ala205Val substitution in acetohydroxyacid synthase of Eastern black nightshade (Solanum ptychanthum) reduces sensitivity to herbicides and feedback inhibition. Weed Science. 55: 558-565.

Beckie, H. J., L.M. Hall, F.J. Tardif and G. Séguin-Swartz. (2007). Acetolactate synthase inhibitor-resistant stinkweed (Thlaspi arvense L.) in Alberta. Canadian Journal of Plant Science. (In press).

Ashigh, J. and F.J. Tardif. (2007). An Ala205Val substitution in acetohydroxyacid synthase of Eastern black nightshade (Solanum ptychanthum) reduces sensitivity to herbicides and feedback inhibition. Weed Science. (In press).