Response of dry beans to halosulfuron applied postemergence

Abstract

Soltani, N., Shropshire, C. and Sikkema, P. H. 2012. Response of dry beans to halosulfuron applied postemergence. Can. J. Plant Sci. 92: 723–728. Four field trials were conducted over a 2-yr period (2009 and 2010) at Exeter and Ridgetown, Ontario, to evaluate the tolerance of adzuki, black, cranberry, kidney, otebo, pinto, Small Red Mexican and white beans to halosulfuron applied postemergence (POST) at 35 and 70 g a.i. ha−1. All treatments including the non-treated control were maintained weed free during the growing season. Halosulfuron applied POST caused as much as 73, 7, 13, 12, 12, 11, 11 and 9% injury in adzuki, black, cranberry, kidney, otebo, pinto, Small Red Mexican (SRM) and white beans, respectively. Halosulfuron applied POST reduced adzuki bean height as much as 52 and 70% at Exeter and Ridgetown, respectively. Plant height was not affected in the other market classes of dry bean evaluated. Halosulfuron POST reduced shoot dry weight of adzuki bean 68% at both rates evaluated. Otebo and SRM bean shoot dry weight were not affected when halosulfuron was applied POST at 35 g a.i. ha−1 but otebo bean shoot dry weight was reduced 12% and SRM bean shoot dry weight was reduced 14% at 70 g a.i. ha−1. Shoot dry weight of black, cranberry, kidney, pinto and white bean was not affected with either rate of halosulfuron. Seed yield of adzuki bean was decreased 58% at 35 g a.i. ha−1 and 68% at 70 g a.i. ha−1 with halosulfuron. White bean yield was not affected with halosulfuron applied POST at 35 g a.i. ha−1 but was reduced 9% at 70 g a.i. ha−1. Seed yield of black, cranberry, kidney, otebo, pinto and SRM bean was not reduced with either rate of halosulfuron. Based on these results, there is not an adequate margin of crop safety for halosulfuron POST in adzuki bean. However, there is potential for POST application of halosulfuron in black, cranberry, kidney, otebo, pinto, SRM and white beans.

Weed Control in White Bean with Various Halosulfuron Tankmixes

“…Trifluralin, s-metolachlor, halosulfuron, and imazethapyr applied alone or in combination applied PPI caused 4% or less visible injury 1 and 4 weeks after emergence (WAE) in white bean (Table 1). This is similar to other studies that have shown up to 6% injury in white bean with halosulfuron applied alone or in tankmixes with other herbicides [9][10][11]. Silvey et al [12] also found minimal and transient injury (5%) with halosulfuron in snap bean.…”

“…Silvey et al [12] also found minimal and transient injury (5%) with halosulfuron in snap bean. In other studies, halosulfuron reduced yield of white bean as much as 9% and adzuki bean as much as 68% but had no effect on the seed yield of black, cranberry, kidney, otebo, pinto, and small red Mexican beans [9,10]. In another study halosulfuron applied postemergence reduced seed yield of white bean as much as 21% [11].…”

Sensitivity of Adzuki Bean (<i>Vigna angularis</i>) to Acifluorfen, Fomesafen, Bentazon, Imazethapyr and Halosulfuron-Methyl Applied Postemergence

“…halosulfuron-methyl applied POST in Phaseolus vulgaris have found up to 50% injury in white bean [12] but no adverse effect on seed yield of black, cranberry, kidney, otebo, pinto and small red Mexican beans [15].…”

Halosulfuron tankmixes applied preplant incorporated for weed control in white bean (Phaseolus vulgaris L.)

“…In previous studies, it has been reported that halosulfuron, applied PPI, is safe for use on most market classes of dry beans with the exception of adzuki, mung, and snap bean (Silvey et al 2006;Soltani et al 2009Soltani et al , 2013aStewart et al 2010). Halosulfuron, applied PPI, caused 58 to 70% injury in adzuki bean and reduced adzuki bean height 52 to 70% (Soltani et al 2009(Soltani et al , 2012aStewart et al 2010). Silvey et al (2006) reported that halosulfuron applied PRE, POST, and PRE follow by POST caused 4, 8, and 5% injury in snap bean and reduced snap bean yield 11, 7, and 15%, respectively.…”