Sulfentrazone plus a Low Rate of Halosulfuron for Weed Control in White Bean Phaseolus vulgaris L.Report as inadecuate




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Halosulfuron was recently registered as the second soil-applied herbicide for broadleaf weed control in Ontario dry beans, but does not provide an alternative mode of action. Sulfentrazone is used to control broadleaf weeds in soybean and other pulse crops, and its registration for Ontario dry beans would provide a different mode of action for broadleaf weed control. Five field studies were conducted over two years 2014, 2015 to determine if the spectrum of broadleaf weed control is improved by adding a half-rate of halosulfuron to sulfentrazone PRE, and to determine the tolerance of white bean to sulfentrazone 140 or 210 g ai ha-1, s-metolachlor 1050 g ai ha-1, and halosulfuron 17.5 g ai ha-1 applied alone and in combination. Crop injury was assessed at 2 and 4 weeks after crop emergence. Weed control was assessed at 4 and 8 weeks after herbicide application WAA, and weed density and biomass were determined at 8 WAA. Seed moisture and yield were determined at harvest. Halosulfuron added to sulfentrazone improved the control of Ambrosia artemisiifolia and Sinapis arvensis. Sulfentrazone + s-metolachlor + halosulfuron caused up to 23% crop injury. Therefore, this study concludes that sulfentrazone + s-metolachlor + halosulfuron provides broad spectrum weed control, but is too injurious to white bean for registration in Ontario.

KEYWORDS

Biomass, Density, Injury, Height, Navy Bean, Phaseolus vulgariss L.

Cite this paper

Taziar, A. , Soltani, N. , Shropshire, C. , Robinson, D. , Long, M. , Gillard, C. and Sikkema, P. 2017 Sulfentrazone plus a Low Rate of Halosulfuron for Weed Control in White Bean Phaseolus vulgaris L

Agricultural Sciences, 8, 227-238. doi: 10.4236-as.2017.83016.





Author: Allison N. Taziar1, Nader Soltani1, Christy Shropshire1, Darren E. Robinson1, Mitch Long2, Chris L. Gillard1, Peter H. Sikkema1

Source: http://www.scirp.org/



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