Selectivity and weed control efficacy of some herbicides applied to sprinkler irrigated rice (Oryza sativa L.)
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Date
2011
Authors
Cavero Campo, JoséZaragoza Larios, Carlos
Cirujeda Ranzenberger, Alicia
Anzalone, Alvaro
Faci González, José María
Blanco Alibés, Olga
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ArticleAbstract
Sprinkler irrigation can reduce the irrigation water needed to grow rice. However, most available information on weed control with herbicides is related to flood irrigated rice because this is the main growing method. Field experiments were conducted at Zaragoza (Spain) during two years to study weed control and tolerance of sprinkler irrigated rice to several herbicides. The main weeds were Atriplex prostrata Bouchér ex DC., Cyperus rotundus L., Echinochloa crus-galli (L.) Beauv. and Sonchus oleraceus L. Rice cv Guadiamar was tolerant to preemergence (PRE) application of clomazone at 0.36 kg ha-1 and oxadiazon at 0.5 kg ha–1. PRE application of pendimethalin at 1.32 kg ha–1 combined with clomazone at 0.36 kg ha-1 decreased rice yield. Postemergence (POST) application of bentazon at 1.6 kg ha–1 + MCPA at 0.25 kg ha–1 did not injure rice but POST application of azimsulfuron at 0.025 kg ha–1 produced visual crop injury. Only treatments that controlled grassy weeds since rice was planted and by more than 80% at harvest time lead to acceptable rice yield (> 5,000 kg ha–1). Clomazone applied PRE at 0.36 kg ha–1 provided good control of grassy weeds (> 80%) and the highest rice yield, so it is recommended as a selective and efficacious PRE treatment for weed control of annual weeds in sprinkler irrigated rice. The perennial purple nutsedge was difficult to control at high plant densities (> 150 plants m–2) and the recommended herbicide is azimsulfuron applied at POST at 0.02 kg ha–1.
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Keywords
Irrigation system, Upland rice, Weed competition, Arroz no inundado, Competencia de malas hierbas, Sistema de riego
Bibliographic citation
J. Cavero, C. Zaragoza, A. Cirujeda, A. Anzalone, J.M. Faci and O. Blanco. "Selectivity and weed control efficacy of some herbicides applied to sprinkler irrigated rice (Oryza sativa L.)". Spanish Journal of Agricultural Research, Vol 9, No 2 (2011), p. 597-605
Other field subjects
Riego por aspersiónHerbicidas
Control de plagas
Arroz
Sanidad vegetal
Suelos y riegos