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Creeping Bentgrass (Agrostis stolonifera) Golf Green Tolerance to Bispyribac-Sodium Tank-Mixed with Paclobutrazol

Published online by Cambridge University Press:  20 January 2017

Justin Q. Moss ,
Xi Xiong ,
Kemin Su ,
Bishow P. Poudel  and
John B. Haguewood
Justin Q. Moss*
Affiliation:
Department of Horticulture & Landscape Architecture, Oklahoma State University, Stillwater, OK 74078
Xi Xiong
Affiliation:
Division of Plant Sciences, University of Missouri, Columbia, MO 65211
Kemin Su
Affiliation:
Department of Horticulture & Landscape Architecture, Oklahoma State University, Stillwater, OK 74078
Bishow P. Poudel
Affiliation:
Department of Horticulture & Landscape Architecture, Oklahoma State University, Stillwater, OK 74078
John B. Haguewood
Affiliation:
Division of Plant Sciences, University of Missouri, Columbia, MO 65211
*
Corresponding author's E-mail: mossjq@okstate.edu
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Abstract

Annual bluegrass is a troublesome weed in golf course putting greens. The objective of this research was to evaluate creeping bentgrass putting green tolerance to bispyribac-sodium tank-mixed with paclobutrazol in the transition zone. Field trials with four replications were conducted in Oklahoma during 2009 and 2010 and in Missouri during 2010. The results of this study suggest that tank-mixing bispyribac-sodium with paclobutrazol may discolor creeping bentgrass putting greens but will not reduce turf quality below acceptable levels. Normalized vegetative difference index readings indicated no treatment differences in turf greenness at 4 and 8 wk after initial treatment. Weekly application of bispyribac-sodium at 12.4 g ha−1 or biweekly application at 24.8 g ha−1 alone or with monthly applications of paclobutrazol at 224 g ha−1 did not cause unacceptable injury to creeping bentgrass putting greens during the spring.

Poa annua es una maleza problemática en las pistas de práctica en los campos de golf. El objetivo de esta investigación fue evaluar la tolerancia de Agrostis stolonifera a la mezcla de bispyribac-sodio con paclobutrazol en la zona de transición. Estudios de campo con cuatro repeticiones se realizaron en Oklahoma durante 2009 y 2010 y en Missouri durante 2010. Los resultados de este estudio sugieren que las mezclas de bispyribac-sodio con paclobutrazol pueden descolorar a A. stolonifera en las pistas de práctica, pero no disminuye la calidad del césped por debajo de los niveles aceptables. Las lecturas de los índices de diferencia vegetativa normalizada indicaron que no hay ninguna diferencia en el tratamiento sobre el verdor del césped a las 4 y 8 semanas después del tratamiento inicial. La aplicación semanal de bispyribac-sodio a 12.4 g ha−1 o la aplicación cada dos semanas a 24.8 g ha−1 por sí solo, o con aplicaciones mensuales de paclobutrazol a 224 g ha−1, no causaron daños inaceptables a las pistas con A. stolonifera durante la primavera.

Keywords

Bispyribac-sodium {2,6-bis[(4,6-dimethoxypyrimidin-2-yl)oxy] benzoic acid}paclobutrazoltrinexapac-ethylannual bluegrass, Poa annua L. POAANcreeping bentgrass, Agrostis stolonifera L. AGSST, ‘Penncross’Phytotoxicityturfgrassputting greenplant growth regulatorNDVI
Type
Notes
Information
Weed Technology , Volume 26 , Issue 1 , March 2012 , pp. 145 - 150
Copyright
Copyright © Weed Science Society of America 

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