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18 May 2018 Response of dry bean to Group 15 herbicides applied preplant incorporated
Nader Soltani, Christy Shropshire, Peter H. Sikkema
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Abstract

A study consisting of four field experiments was conducted over a 2-yr period (2016, 2017) near Exeter and Ridgetown, ON, to compare the tolerance of adzuki, kidney, small red, and white beans to four Group 15 herbicides including pethoxamid (1200 and 2400 g a.i. ha-1), S-metolachlor (1600 and 3200 g a.i. ha-1), dimethenamid-P (693 and 1386 g a.i. ha-1), and pyroxasulfone (100 and 200 g a.i. ha-1) applied preplant incorporated (PPI). At 1 wk after emergence (WAE), pethoxamid, S-metolachlor, dimethenamid-P, and pyroxasulfone caused as much as 22%, 17%, 38%, and 15% adzuki bean injury, respectively. The injury decreased with time; at 8 WAE, pethoxamid, S-metolachlor, dimethenamid-P, and pyroxasulfone applied PPI caused as much as 3%, 4%, 12%, and 7% adzuki bean injury, respectively. The injury was lower in other market classes of dry bean. At 1, 2, and 4 WAE, pethoxamid, S-metolachlor, dimethenamid-P, and pyroxasulfone caused as much as 4%, 2%, 4%, and 14% injury in kidney bean, 3%, 2%, 4%, and 12% injury in small red bean, and 5%, 3%, 6%, and 13% injury in white bean, respectively. However, the injury at 8 WAE was 5% or less in kidney, small red, and white beans with all Group 15 herbicides evaluated. Based on this research, pyroxasulfone was the most injurious to dry beans, it reduced plant height as much as 15% and seed yield as much as 17%. The Group 15 herbicides evaluated were more injurious to adzuki bean than kidney, small red, or white beans.

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Nader Soltani, Christy Shropshire, and Peter H. Sikkema "Response of dry bean to Group 15 herbicides applied preplant incorporated," Canadian Journal of Plant Science 98(5), 1168-1175, (18 May 2018). https://doi.org/10.1139/cjps-2018-0020
Received: 25 January 2018; Accepted: 26 April 2018; Published: 18 May 2018
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KEYWORDS
dry bean
pethoxamid
Phaseolus vulgaris
Pyroxasulfone
S-metolachlor
Vigna angularis
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