Safening effect of bentazon on cloransulam-methyl and halosulfuron-methyl in dry bean

Abstract

Bentazon, applied as a tankmix, has been shown to have the potential for reducing the injury from some POST herbicides. Field experiments were conducted in 2008 and 2009 at Exeter, ON and in 2009 at Ridgetown, ON to determine if the addition of bentazon reduces the injury from cloransulam-methyl or halosulfuron-methyl applied POST in black, cranberry, kidney and white beans. Bentazon added to cloransulam-methyl reduced the level of injury 0 to 6% at 17.5 g·ai·ha<sup>–1</sup> and 0 to 9% at 35 g·ai·ha<sup>–1</sup> in dry bean. Bentazon added to halosulfuron-methyl reduced the level of injury as much as 4% at 35 g·ai·ha<sup>–1</sup> and 6% at the 70 g·ai·ha<sup>–1</sup>. Bentazon added to cloransulam-methyl increased plant height as much as 3 cm. The addition of bentazon to halosulfuron-methyl had no effect on the height of various market classes of dry bean. Bentazon added to cloran-sulam-methyl generally has no effect on seed moisture content in black and white bean but decreased seed moisture content of cranberry and kidney bean as much as 4%. The addition of bentazon to halosulfuron-methyl caused no effect on seed moisture content of dry bean. Cloransulam-methyl caused a 7% to 18% reduction in dry bean yield compared to halosulfuron-methyl and 12% to 21% reduction in yield compared to bentazon. Bentazon added to cloransulam-methyl increased dry bean yield by 0.16 and 0.31 t·ha<sup>–1</sup> at Exeter (2009) and Ridgetown (2009) respectively. The addition of bentazon to halosulfuron-methyl had no effect on dry bean yield

Weed management in white beans with postemergence herbicide tankmixes

“…However, other herbicide treatments evaluated had no adverse effect on yield of white bean (Table 2). In other studies, cloransulam-methyl reduced yield of black bean 29 to 43%, cranberry bean 43% and white bean 36 to 54% (Soltani et al 2012). Similar yield reductions have been reported in dry bean cultivars in response to ALSinhibiting herbicides such as thifensulfuron, chlorimuron, and imazethapyr (Wilson and Miller 1991;Bauer et al 1995;Blackshaw and Saindon 1996;Urwin et al 1996;Sikkema et al 2004;Soltani et al 2008).…”

“…Other herbicide treatments that included bentazon (bentazon, bentazon plus fomesafen, cloransulam-methyl plus bentazon, and cloransulam-methyl plus bentazon plus fomesafen) were most effective and reduced CHEAL biomass 94 to 97%, compared with the untreated control (Table 2). In other studies, cloransulam-methyl applied at 17.5, 35, and 70 g ha (1 reduced biomass 16, 20, and 28% compared with the untreated control, respectively (Soltani et al 2012).…”

Weed control and crop selectivity of post-emergence herbicides in common beans

“…The yield of imazethapyr tank-mixed with bentazon was higher in the cultivars 'IPR Uirapuru' and 'BRS Estilo' compared to imazethapyr alone. These results differ from SOLTANI et al (2012) and SOLTANI et al (2013), which reported a 12% yield increase on the treatment with cloransulam+bentazon against cloransulam alone. Whereas, BAUER et al (1995b) reported that the treatment with imazethapyr tankmixed with bentazon assured the grain yield at the same level of the non-treated weed-free plot, opposing this experiment.…”

“…ha -1 is reported to cause crop injury of 8% at 14DAT on common beans, yet yield loss ranging from 29 to 43% (SOLTANI et al, 2013). The herbicide cloransulam has the potential to be used in common beans when tank mixed with bentazon, which promoted a safening (protects) effect on acetolactate synthase (ALS) herbicides by decreasing the rate of absorption and translocation throughout the plant; moreover, tank-mixing imazethapyr or cloransulam with bentazon, amplified the weed control spectrum (SOLTANI et al, 2012;SOLTANI et al, 2013). Diclosulam belongs to the group of the triazolopyrimidine, which is the same of the herbicide cloransulam (OLIVEIRA JR., 2011).…”

Ethoxysulfuron no controle de plantas daninhas na cultura do feijoeiro comum

“…Devido principalmente ao potencial uso do herbicida para o controle da soja tiguera, mais estudos avaliando o efeito do ethoxysulfuron sobre a cultura do feijão deveriam ser conduzidos, principalmente no que se refere a associação com outros latifolicidas já registrados para o feijoeiro. Conforme demonstrado por Soltani et al (2012b), a associação de bentazon com diferentes herbicidas inibidores da ALS, auxilia na redução da injúria proporcionada por estes últimos sobre a cultura do feijão.…”