AS  Vol.6 No.11 , November 2015
Responses of Winter Wheat to Herbicide-Fungicide Tankmixes
Abstract: Tankmixing herbicides with fungicides could improve production efficiency and reduce application costs. A total of six field trials were conducted from 2012 to 2014 in Ontario to study the tolerance of winter wheat to herbicide (fenoxaprop-p-ethyl/mefenpyr, prosulfuron + bromoxynil and fluroxypyr + MCPA ester) plus fungicide tankmixes (pyraclostrobin/metconazole, tri-floxystrobin/propiconazole, azoxystrobin/propiconazole and picoxystrobin) applied alone and as a tankmix. At 1 WAT, fenoxaprop-p-ethyl/mefenpyr applied alone or in tankmix with tri-floxystrobin/propiconazole or azoxystrobin/propiconazole fungicides caused minimal visible injury (up to 1.3%) in winter wheat but caused no significant injury when applied as a tankmix with pyraclostrobin/metconazole or picoxystrobin fungicides. There was no effect on visible injury in winter wheat with other herbicide and fungicide tankmixes. Fenoxaprop-p-ethyl/mefenpyr applied alone with no fungicide reduced winter wheat height 3% but had no adverse effect on height when tankmixed with fungicides evaluated. Prosulfuron + bromoxynil or fluroxypyr + MCPA ester herbicides applied alone with no fungicide or tankmixed with pyraclostrobin/metconazole, tri-floxystrobin/propiconazole, azoxystrobin/propiconazole and picoxystrobin fungicides had no adverse effect on winter wheat height. There was no adverse effect of herbicide plus fungicide treatments on winter wheat yield. Co-application of fenoxaprop-p-ethyl/mefenpyr, prosulfuron + bromoxynil and fluroxypyr + MCPA ester herbicides with pyraclostrobin/metconazole, tri-floxystrobin/pro- piconazole, azoxystrobin/propiconazole and picoxystrobin fungicides could provide winter wheat growers with a single-pass treatment for the control of weeds and diseases.
Cite this paper: Nader, S. , Shropshire, C. and Sikkema, P. (2015) Responses of Winter Wheat to Herbicide-Fungicide Tankmixes. Agricultural Sciences, 6, 1352-1356. doi: 10.4236/as.2015.611129.

[1]   Agriculture and Agri-Food Canada (2010) Crop Profile for Winter Wheat in Canada. Pesticide Risk Reduction Program, Pest Management Center, Ottawa.

[2]   Swanton, C.J. (2004) Ontario Field Crops Research and Services Committee Annual Report. Ontario Ministry of Agriculture and Food, Toronto, 26.

[3]   Alberta Wheat Commission (2013) Winter Wheat Production Manual. Alberta Wheat Commission, Calgary.

[4]   Ontario Ministry of Agriculture, Food, and Rural Affairs (OMAFRA) (2014) Guide to Weed Control. Publication 75, Ontario Ministry of Agriculture, Food, and Rural Affairs, Toronto.

[5]   Jordan, D.L., Culpepper, A.S., Grichar, W.J., Tredaway-Ducar, J., Brecke, B.J. and York, A.C. (2003) Weed Control with Combinations of Selected Fungicides and Herbicides Applied Postemergence to Peanut (Arachis hypogaea L.). Peanut Science, 30, 1-8.

[6]   Lancaster, S.H., Jordan, D.L., Brandenburg, R.L., Royal, B., Shew, B., Bailey, J., Curtis, V., York, A.C., Wilcut, J.W., Beam, J., Prostko, E., Culpepper, A.S., Grey, T., Johnson III, C., Kemerait, R., Brecke, B., McDonald, G., Tredaway-Ducar, J., College, B. and Wall, B. (2005) Tank Mixing Chemicals Applied to Peanut Crops: Are the Chemicals Compatible? Extension Bulletin No. AGW653, North Carolina Cooperative Extension Service, NC, 11 p.

[7]   Lancaster, S.H., Jordan, D.L., Spears, J.F., York, A.C., Wilcut, J.W., Monks, D.W., Batts, R.B. and Brandenburg, R.L. (2005) Sicklepod (Senna obtusifolia) Control and Seed Production after 2, 4-DB Applied Alone and with Fungicides or Insecticides. Weed Technology, 19, 451-455.

[8]   Statistical Analysis Systems (SAS) (2008) The SAS System for Windows, Release 9.2. Statistical Analysis Systems Institute, Cary.

[9]   Grichar, J.W. and Prostko, E.P. (2009) Effect of Glyphosate and Fungicide Combinations on Weed Control in Soybeans. Crop Protection, 28, 619-622.

[10]   Soltani, N., Shropshire, C. and Sikkema, P.H. (2012) Co-Application of Glyphosate Plus an Insecticide or Fungicide in Glyphosate-Resistant Soybean. Canadian Journal of Plant Science, 92, 297-302.