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1 December 2014 Nutsedge (Cyperus spp.) Control in Bell Pepper ( Capsicum annuum) Using Fallow-Period Weed Management and Fumigation for Two Years
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Abstract

Integrated management programs are becoming increasingly necessary for nutsedge control in the absence of methyl bromide. In 2012, field studies were established and maintained for a period of 2 yr at two locations to evaluate the additive effect of fallow programs and preplant fumigants for nutsedge control in bell pepper. The study included eight fallow programs consisting of eight combinations of glyphosate (G) and cultivation (C), and two fumigants; 1,3-dichloropropene chloropicrin, dimethyl-disulfide chloropicrin, and a nontreated check. All fallow programs provided greater late-season control of nutsedge compared to the nontreated, with the greatest control of nutsedge observed with glyphosate fb (followed by) glyphosate (GG) and glyphosate fb cultivation fb glyphosate (GCG) fallow programs. Fumigation provided additional nutsedge control in single-input fallow programs. Increased marketable yield was observed in 2012 with the application of either fumigant compared to a nonfumigated control. Furthermore, increased marketable yield was observed with more intensive fallow programs in 2013. Nutsedge control in bell pepper was significantly increased when a fallow program was used in combination with other weed-management practices.

Nomenclature: 1,3-dichloropropene; chloropicrin; dimethyl-disulfide; glyphosate; purple nutsedge, Cyperus rotundus L.; yellow nutsedge, Cyperus esculentus L.; bell pepper, Capsicum annuum L.

Los programas de manejo integrado se están convirtiendo en una necesidad para el control de Cyperus spp. en ausencia de methyl bromide. En 2012, se establecieron estudios de campo en dos localidades y se mantuvieron por un período de 2 años para evaluar el efecto aditivo de programas de barbecho y fumigantes pre-siembra para el control de Cyperus spp. en pimentón. El estudio incluyó ocho programas de barbecho consistiendo de ocho combinaciones de glyphosate (G) y cultivación (C), y dos fumigantes: 1,3-dichloropropene chloropicrin, dimethyl-disulfide chloropicrin, y un testigo no-tratado. Todos lo programas de barbecho brindaron mayor control al final de la temporada de crecimiento al compararse con el testigo no-tratado, observándose el mayor control de Cyperus spp. en los programas de barbecho con glyphosate fb (seguido de) glyphosate (GG) y glyphosate fb cultivación fb glyphosate (GCG). La fumigación brindó un control adicional de Cyperus spp. en sistemas de barbecho con un solo insumo. En 2012, se observó un aumento en el rendimiento comercializable con la aplicación de cualquiera de los fumigantes al compararse con el testigo no-fumigado. Adicionalmente, se observó un incremento en el rendimiento comercializable con programas de barbecho más intensivos en 2013. El control de Cyperus spp. en pimentón fue significativamente incrementado cuando se usó un programa de barbecho en combinación con otras prácticas de manejo de malezas.

M. Ryan Miller, Peter J. Dittmar, Gary E. Vallad, and Jason A. Ferrell "Nutsedge (Cyperus spp.) Control in Bell Pepper ( Capsicum annuum) Using Fallow-Period Weed Management and Fumigation for Two Years," Weed Technology 28(4), 653-659, (1 December 2014). https://doi.org/10.1614/WT-D-14-00027.1
Received: 21 March 2014; Accepted: 1 July 2014; Published: 1 December 2014
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