Limited occurrence of resistant radish (Raphanus sativus) to AHAS-inhibiting herbicides in Argentina

 

Autores
Pandolfo, Claudio Ezequiel; Presotto, Alejandro Daniel; Poverene, Maria Monica; Cantamutto, Miguel Angel
Tipo de recurso
artículo
Estado
Versión publicada
Año de publicación
2013
País
Argentina
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio
CONICET Digital (CONICET)
Descripción
ABSTRACT - Radish has developed feral and weedy biotypes, which is a concern for agriculture around the world. In Argentina, it is one of the most widespread and troublesome crop weeds. In Brazil, this species has developed herbicide-resistance to acetohydroxyacid synthase (AHAS) inhibiting herbicides. The objective of this study was to record the presence of herbicide-resistant weedy radish plants in Argentina. In spring 2008, we found a small population of radish at the end of the flowering stage in an imidazolinone-tolerant canola field treated with imazethapyr. Screening and dose-response tests were conducted to two successive generations. They proved the biotype resistant status, and showed extensive survival (between 50 and 80% of control) to the application of a double dose of four AHAS-inhibiting herbicides from two different chemical families (imidazolinones and sulfonylureas). Dose-response assays exhibited very high resistance for imazethapyr (LD50 = 2452.5 g a.i. ha-1, GR50 = 2926.9 g a.i. ha-1) and intermediate for metsulfuron (LD50 = 3.0 g a.i. ha-1, GR50 = 43.2 g a.i. ha-1). The acquisition of cross-resistance to different herbicide families would confer an adaptive and invasive advantage in agricultural environments to this biotype. Due to the herbicide rotation conducted in the field, the dispersion of this biotype was restricted. This is the first report of resistance in weedy radish in Argentina.
Idioma
inglés
OAI Identifier
oai:ri.conicet.gov.ar:11336/1949
Enlace del recurso
http://hdl.handle.net/11336/1949
Nivel de acceso
Acceso abierto
Materia
HERBICIDE - RESITENCE
IMAZETHAPYR
METSULFURON
DOSE - RESPONSE
Horticultura, Viticultura
Agricultura, Silvicultura y Pesca
CIENCIAS AGRÍCOLAS