Using penoxsulam ALS inhibitor as a broad-spectrum herbicide in Chilean rice

The continuously-flooded rice production system in Chile has selected highly competitive aquatic weeds selection capable ofreducing paddy yields by 25 to 50%. Penoxsulam is a broad-spectrum triazolopyrimidine (ALS inhibitor) commercially introduced in Chile in 2006, where Alisma plantago aquatica ha...

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Autores principales:	Kogan,Marcelo, Gómez,Patricio, Fischer,Albert, Alister,Claudio
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2011
Materias:	Penoxsulam bensulfuron metsulfuron MCPA bentazon triclopyr Cyperus difformis Schoenoplectus mucronatus Alisma plantago-aquatica Echinochloa crus-galli herbicide-resistance
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100008
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spelling	oai:scielo:S0718-162020110001000082011-08-18Using penoxsulam ALS inhibitor as a broad-spectrum herbicide in Chilean riceKogan,MarceloGómez,PatricioFischer,AlbertAlister,Claudio Penoxsulam bensulfuron metsulfuron MCPA bentazon triclopyr Cyperus difformis Schoenoplectus mucronatus Alisma plantago-aquatica Echinochloa crus-galli herbicide-resistance The continuously-flooded rice production system in Chile has selected highly competitive aquatic weeds selection capable ofreducing paddy yields by 25 to 50%. Penoxsulam is a broad-spectrum triazolopyrimidine (ALS inhibitor) commercially introduced in Chile in 2006, where Alisma plantago aquatica hads already evolved resistance to sulfonylurea herbicides (SU). Several field trials with water seeded rice were conducted during 2003 and 2004 in Chile to determine efficacy, timing of application, spectrum of control, and control of SU-resistant A. plantago aquatica with the herbicide penoxsulam, either in single applications or in sequence with other herbicides. Penoxsulam was applied a) 12 days after seeding (DAS) into the water (IW), b) in postemergence after draining the water from field (ADW) at 35 DAS or c) IW followed by ADW applications of MCPA, cyhalofop, bentazon, or triclopyr. Penoxsulam was tested at 20, 30, and 40 g a.i. ha-1. Comparisons were made with recommended rates of other IW treatments (metsulfuron, bensulfuron and cyclosulfomuron) and sequential applications of molinate (IW) followed by ADW applications of MCPA, cyhalofop, bentazon, or triclopyr. One IW penoxsulam application was sufficient to achieve broad-spectrum control: Echinochloa spp. (100% control), A.plantago-aquatica (80 to 100%), Schoenoplectus mucronatus (50 to 80%), and Cyperus difformis (80 to 100%). Rice yields in penoxsulam-treated plots were 30 to 56% higher than in the untreated controls. Yields with penoxsulam IW (all rates) were similar (P>0.05) to those obtained using molinate (IW) followed by ADW applications of bentazon or MCPA. Although penoxsulam is an ALS inhibitor, it controlled A. plantago-aquatica resistant to metsulfuron and bensulfuron.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.38 n.1 20112011-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100008en10.4067/S0718-16202011000100008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Penoxsulam bensulfuron metsulfuron MCPA bentazon triclopyr Cyperus difformis Schoenoplectus mucronatus Alisma plantago-aquatica Echinochloa crus-galli herbicide-resistance
spellingShingle	Penoxsulam bensulfuron metsulfuron MCPA bentazon triclopyr Cyperus difformis Schoenoplectus mucronatus Alisma plantago-aquatica Echinochloa crus-galli herbicide-resistance Kogan,Marcelo Gómez,Patricio Fischer,Albert Alister,Claudio Using penoxsulam ALS inhibitor as a broad-spectrum herbicide in Chilean rice
description	The continuously-flooded rice production system in Chile has selected highly competitive aquatic weeds selection capable ofreducing paddy yields by 25 to 50%. Penoxsulam is a broad-spectrum triazolopyrimidine (ALS inhibitor) commercially introduced in Chile in 2006, where Alisma plantago aquatica hads already evolved resistance to sulfonylurea herbicides (SU). Several field trials with water seeded rice were conducted during 2003 and 2004 in Chile to determine efficacy, timing of application, spectrum of control, and control of SU-resistant A. plantago aquatica with the herbicide penoxsulam, either in single applications or in sequence with other herbicides. Penoxsulam was applied a) 12 days after seeding (DAS) into the water (IW), b) in postemergence after draining the water from field (ADW) at 35 DAS or c) IW followed by ADW applications of MCPA, cyhalofop, bentazon, or triclopyr. Penoxsulam was tested at 20, 30, and 40 g a.i. ha-1. Comparisons were made with recommended rates of other IW treatments (metsulfuron, bensulfuron and cyclosulfomuron) and sequential applications of molinate (IW) followed by ADW applications of MCPA, cyhalofop, bentazon, or triclopyr. One IW penoxsulam application was sufficient to achieve broad-spectrum control: Echinochloa spp. (100% control), A.plantago-aquatica (80 to 100%), Schoenoplectus mucronatus (50 to 80%), and Cyperus difformis (80 to 100%). Rice yields in penoxsulam-treated plots were 30 to 56% higher than in the untreated controls. Yields with penoxsulam IW (all rates) were similar (P>0.05) to those obtained using molinate (IW) followed by ADW applications of bentazon or MCPA. Although penoxsulam is an ALS inhibitor, it controlled A. plantago-aquatica resistant to metsulfuron and bensulfuron.
author	Kogan,Marcelo Gómez,Patricio Fischer,Albert Alister,Claudio
author_facet	Kogan,Marcelo Gómez,Patricio Fischer,Albert Alister,Claudio
author_sort	Kogan,Marcelo
title	Using penoxsulam ALS inhibitor as a broad-spectrum herbicide in Chilean rice
title_short	Using penoxsulam ALS inhibitor as a broad-spectrum herbicide in Chilean rice
title_full	Using penoxsulam ALS inhibitor as a broad-spectrum herbicide in Chilean rice
title_fullStr	Using penoxsulam ALS inhibitor as a broad-spectrum herbicide in Chilean rice
title_full_unstemmed	Using penoxsulam ALS inhibitor as a broad-spectrum herbicide in Chilean rice
title_sort	using penoxsulam als inhibitor as a broad-spectrum herbicide in chilean rice
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100008
work_keys_str_mv	AT koganmarcelo usingpenoxsulamalsinhibitorasabroadspectrumherbicideinchileanrice AT gomezpatricio usingpenoxsulamalsinhibitorasabroadspectrumherbicideinchileanrice AT fischeralbert usingpenoxsulamalsinhibitorasabroadspectrumherbicideinchileanrice AT alisterclaudio usingpenoxsulamalsinhibitorasabroadspectrumherbicideinchileanrice
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Using penoxsulam ALS inhibitor as a broad-spectrum herbicide in Chilean rice

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