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

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dc.contributor.authorKogan, Marcelo
dc.contributor.authorGomez, Patricio
dc.contributor.authorFischer, Albert
dc.contributor.authorAlister, Claudio
dc.date.accessioned2025-01-21T00:03:29Z
dc.date.available2025-01-21T00:03:29Z
dc.date.issued2011
dc.description.abstractM. Kogan, P. Gomez, A. Fischer, and C. Alister. 2011. Using penoxsulam ALS inhibitor as a broad-spectrum herbicide in Chilean rice. Cien. Inv. Agr. 38(1): 83-93. The continuously-flooded rice production system in Chile has selected highly competitive aquatic weeds selection capable of reducing paddy yields by 25 to 50%. Penoxsulam is abroad-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 aquatic(a 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 (I W), b) in postemergence after draining the water from field (ADW) at 35 DAS ore) 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.
dc.fuente.origenWOS
dc.identifier.issn0718-1620
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95466
dc.identifier.wosidWOS:000289380400008
dc.issue.numero1
dc.language.isoen
dc.pagina.final93
dc.pagina.inicio83
dc.revistaCiencia e investigacion agraria
dc.rightsacceso restringido
dc.subjectPenoxsulam
dc.subjectbensulfuron
dc.subjectmetsulfuron
dc.subjectMCPA
dc.subjectbentazon
dc.subjecttriclopyr
dc.subjectCyperus difformis
dc.subjectSchoenoplectus mucronatus
dc.subjectAlisma plantago-aquatica
dc.subjectEchinochloa crux-galli
dc.subjectherbicide-resistance
dc.subject.ods02 Zero Hunger
dc.subject.ods13 Climate Action
dc.subject.odspa02 Hambre cero
dc.subject.odspa13 Acción por el clima
dc.titleUsing penoxsulam ALS inhibitor as a broad-spectrum herbicide in Chilean rice
dc.typeartículo
dc.volumen38
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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