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Weed Management in Single- vs. Twin-Row Cotton (Gossypium hirsutum)

Published online by Cambridge University Press:  20 January 2017

Daniel O. Stephenson IV  and
Barry J. Brecke
Daniel O. Stephenson IV*
Affiliation:
West Florida Research and Education Center, Agronomy Department, Institute of Food and Agricultural Science, University of Florida, 5988 Highway 90, Building 4900, Milton, FL 32583
Barry J. Brecke
Affiliation:
West Florida Research and Education Center, Agronomy Department, Institute of Food and Agricultural Science, University of Florida, 5988 Highway 90, Building 4900, Milton, FL 32583
*
Corresponding author's E-mail: [email protected].
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Abstract

Research was conducted to determine the effect of planting pattern, plant density, and levels of weed management intensity on intercepted photosynthetically active radiation (IPAR), weed control, and cotton lint yield in glyphosate-resistant cotton. Twin-row planting pattern canopy IPAR was 55% 7 wk after emergence (WAE) and 76% 9 WAE compared to 48% for single-row planting pattern 7 WAE and 59% 9 WAE. Regardless of cotton density, row spacing, or weed management intensity, control of browntop millet and Florida beggarweed was at least 88% 18 WAE. Benghal dayflower, sicklepod, and smallflower morningglory control was greater in twin-rows compared to single-rows at a cotton density of 7 plants m−2. Control of Benghal dayflower and sicklepod increased when cotton density increased at low weed management intensities; however, cotton density had no effect on weed control at higher levels of weed management input. At a cotton plant density of 7 plants m−2, twin-row cotton yielded 220 kg ha−1 more than the single-row planting pattern. Data indicates twin-row cotton production is feasible and that control of various weeds was better in twin-row than single-row pattern at lower cotton density and weed management intensity.

Se efectuó un estudio para determinar en algodón resistente a glifosato, los efectos del patrón y la densidad de siembra, los niveles de intensidad del manejo de maleza en la intercepción de la radiación fotosintéticamente activa (IPAR), el control de la maleza y el rendimiento de fibra de algodón. A 7 semanas después de la emergencia (WAE), la IPAR en el dosel del patrón de doble hilera fue de 55% y en sencilla 48%. A 9 WAE, la IPAR registrada en doble hilera y sencilla fue de 76% y 59%, respectivamente. Indistintamente de la densidad del algodón, el espacio entre hileras o la intensidad del manejo de maleza, el control de Urochloa ramosa y de Desmodium tortuosum fue cuando menos de 88%, a 18 WAE. El control de Commelina benghalensis, Senna obtusifolia y Jacquemontia tamnifolia fue mayor en doble hilera comparado con hilera sencilla, a una densidad del algodón de 7 plantas m−2. El control de Commelina benghalensis y de Jacquemontia tamnifolia se incrementó cuando la densidad del algodón fue mayor a baja intensidad en el manejo de la maleza; sin embargo, la densidad del algodón no tuvo efecto en el control, cuando los niveles de manejo de la maleza fueron más altos. A una densidad de 7 plantas m−2, el algodón sembrado a doble hilera tuvo un rendimiento de 220 kg ha−1 adicional, que en el patrón de siembra de una sola hilera. Los datos indican que la producción de algodón sembrado en doble hilera es factible y que el control de varias especies de maleza fue mejor en un sistema de doble hilera que en uno de simple, en los niveles más bajos de densidad del algodón y de intensidad en el manejo de la maleza.

Keywords

GlyphosateMSMAprometrynS-metolachlorBenghal dayflower, Commelina benghalensis L. COMBEbrowntop millet, Urochloa ramosa (L.) Nguyan PANRAFlorida beggarweed, Desmodium tortuosum (Sw.) DC. DEDTOsicklepod, Senna obtusifolia (L.) Irwin and Barneby CASOBsmallflower morningglory, Jacquemontia tamnifolia (L.) Griseb. IAQTAcotton, Gossypium hirsutum L.Double-rowherbicidelight interceptionnarrow-rowplant populationweed control
Type
Weed Management—Major Crops
Information
Weed Technology , Volume 24 , Issue 3 , September 2010 , pp. 275 - 280
Copyright
Copyright © Weed Science Society of America 

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