Fecha/hora: 07/06/2024 02:03:13

Biblioteca(s): 	INIA Tacuarembó; INIA Treinta y Tres.	
Tipo de la producción científica: 	Artículos en Revistas Indexadas Internacionales	
Circulación/Nivel: 	Internacional - --	
Fecha corriente: 	22/11/2019	
Fecha de la última actualización: 	28/11/2019	
Autoria: 	MARCHESI, C.; SALDAIN, N.E.	
Afiliación: 	CLAUDIA ELIZABETH MARCHESI GYERMAN, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; NÉSTOR ELIO SALDAIN CROCCE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	First report of herbicide-resistant Echinochloa crus-galli in Uruguayan rice fields.	
Año de publicación: 	2019	
Fuente/Imprenta: 	Agronomy, v. 9, no.12, p. 790, 2019. OPEN ACCESS.	
DOI: 	10.3390/agronomy9120790	
Idioma: 	Inglés	
Notas: 	Article history: Received: 19 October 2019; Accepted: 20 November 2019; Published: 22 November 2019.	
Contenido: 	Abstract: Echinochloa crus-galli is the main weed in direct dry-seeded rice systems worldwide and is the target of most herbicide applications. Numerous cases of E. crus-galli biotypes with resistance to herbicides have been reported in dierent regions of the world; however, to date, no cases have been reported in Uruguay. The purpose of this research is to assess the presence of herbicide-resistant E. crus-galli in the rice fields of Uruguay. More than 40 E. crus-galli biotypes were sampled from eastern to northern regions in dierent years and assessed following the Herbicide Resistance Action Committee (HRAC) protocols of confirmation, using the herbicides propanil, quinclorac, clomazone, bispyribac?sodium, penoxsulam, imazapyr + imazapic, profoxidim and cyhalofop. Herbicides rates included 0, 0.125, 0.25, 0.50, 1, 2, 4 and 8 times the label rate. Most E. crus-galli biotypes (35) resulted as resistant to quinclorac. Furthermore, resistance was confirmed to propanil in at least seven biotypes, 12 to imazapyr + imazapic, and three to penoxsulam. Five biotypes showed multiple resistance to propanil and quinclorac, and one biotype was resistant to quinclorac, penoxsulam and imazapyr + imazapic. No biotype showed confirmed resistance to clomazone, bispyribac-sodium, cyhalofop or profoxidim?herbicides that ensure satisfactory control. The presence of E. crus-galli herbicide resistant-biotypes reduces herbicide options, threatening rice production in Uruguay. In this context, a redesign of the productive systems would represent an opportunity to complement the chemical control, integrating larger-scale cultural and management practices.	
Palabras-Clave: 	BARNYARDGRASS; IMAZAPIR + IMAZAPIC; PENOXSULAM; PROPANIL; QUINCLORAC; RICE (ORYZA SATIVA L.).	
Categoría del tema: 	F01 Cultivo	
URL: 	http://www.ainfo.inia.uy/digital/bitstream/item/13815/1/Marchesi-2019.pdf	
Registro original: 	INIA Tacuarembó (TBO)	
Ejemplares: 	TBO - (103087-1) - INI - AP - DD -  -  -  - DIS
TT - (102934-1) - PXI - AP - DD - PP/Agronomy/2019/Marchesi -  - Mar2019 - DIS