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Effect of Carrier Volume on Grain Sorghum Response to Simulated Drift of Nicosulfuron

Published online by Cambridge University Press:  20 January 2017

Mark A. Matocha  and
Curtis A. Jones
Mark A. Matocha*
Affiliation:
Texas A&M AgriLife Extension Service, College Station, TX 77843
Curtis A. Jones
Affiliation:
Texas A&M Commerce, Commerce, TX 75428
*
Corresponding author's E-mail: [email protected].
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Abstract

Research was conducted in 2010 and 2012 to determine the effect of simulated drift of nicosulfuron on growth and yield of grain sorghum. Herbicide rates represented 25, 12.5, and 6.3% of the use rate of nicosulfuron at 52 g ai ha−1. Nicosulfuron was applied in a constant carrier volume of 224 L ha−1 where herbicide concentration decreased with reduction in rate, and in carrier volumes of 56, 28, and 14 L ha−1 proportional to the 25, 12.5, and 6.3% herbicide rates, respectively. In 2010, grain sorghum injury and yield were greater when nicosulfuron was applied in constant compared to proportional carrier volume. Grain sorghum injury and plant height reduction increased with increasing nicosulfuron rate when averaged across carrier volume both years. In 2012, there was a greater reduction in grain sorghum yield from nicosulfuron applied in proportional carrier volume. These data indicate that simulated drift of nicosulfuron onto conventional grain sorghum causes significant height and yield reduction even at the lowest herbicide rate tested, and the effect of carrier volume may be influenced by seasonal rainfall.

En 2010 y 2012, se realizó una investigación para determinar el efecto de la deriva simulada de nicosulfuron sobre el crecimiento y el rendimiento del sorgo para grano. Las dosis del herbicida representaron 25, 12.5, y 6.3% de la dosis de uso 52 g ai ha−1 de nicosulfuron. Nicosulfuron fue aplicado a un volumen constante de 224 L ha−1 donde la concentración del herbicida disminuyó con la reducción de la dosis, y en volúmenes de 56, 28, y 14 L ha−1 proporcionales a los 25, 12.5, y 6.3% de dosis del herbicida, respectivamente. En 2010, el daño en el sorgo para grano y el rendimiento fueron mayores cuando nicosulfuron fue aplicado a un volumen constante que con volúmenes proporcionales. El daño en el sorgo y la reducción en la altura de planta aumentaron con el incremento de la dosis de nicosulfuron cuando se promedió a lo largo de los diferentes volúmenes de aplicación en ambos años. En 2012, hubo una mayor reducción en el rendimiento del sorgo para grano producido por nicosulfuron aplicado en volúmenes proporcionales. Estos datos indican que la deriva simulada de nicosulfuron en sorgo para grano convencional causa reducciones significativas en la altura y el rendimiento del cultivo inclusive a la dosis más baja evaluada, y el efecto del volumen de aplicación podría ser influenciado por la lluvia.

Keywords

Nicosulfurongrain sorghum, Sorghum bicolor (L.) MoenchALSspray volume
Type
Research Article
Information
Weed Technology , Volume 29 , Issue 4 , December 2015 , pp. 684 - 688
Copyright
Copyright © Weed Science Society of America 

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Footnotes

Associate Editor for this paper: Jason Bond, Mississippi State University.

References

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