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Bensulfuron and Halosulfuron Alter Clomazone Activity on Rice (Oryza sativa)

Published online by Cambridge University Press:  20 January 2017

Eric P. Webster*
Affiliation:
Department of Agronomy and Environmental Management, 104 Sturgis Hall, Louisiana State University AgCenter, Baton Rouge, LA 70803
Christopher R. Mudge
Affiliation:
Department of Agronomy and Environmental Management, 104 Sturgis Hall, Louisiana State University AgCenter, Baton Rouge, LA 70803
Wei Zhang
Affiliation:
Department of Agronomy and Environmental Management, 104 Sturgis Hall, Louisiana State University AgCenter, Baton Rouge, LA 70803
David C. Blouin
Affiliation:
Department of Experimental Statistics, 45 Agriculture Administration Building, Louisiana State University AgCenter, Baton Rouge, LA 70803
*
Corresponding author's E-mail: ewebster@agcenter.lsu.edu

Abstract

A laboratory study was conducted in 2003 at Louisiana State University in Baton Rouge, LA, to evaluate the interactive effects of bensulfuron or halosulfuron on clomazone in terms of rice foliar bleaching and chlorophyll content. Clomazone was applied alone at 0 and 1.227 μg/ml (672 g/ha) or in combination with bensulfuron at 0.0276 μg ai/ml (42 g ai/ha) or halosulfuron at 0.0345 μg ai/ml (53 g ai/ha) in a hydroponic solution. Bensulfuron and halosulfuron were also applied alone. Rice cultivars evaluated included short-grain ‘Pirogue’, medium-grain ‘Bengal’, and long-grain ‘Cocodrie’. Bensulfuron and halosulfuron, applied in a hydroponic solution, safened medium-grain Bengal, long-grain Cocodrie, and short-grain Pirogue at 21 d after treatment (DAT) from foliar bleaching caused by clomazone. Chlorophyll a and b and total chlorophyll content of all three rice cultivars decreased when treated with clomazone treatment. Only chlorophyll content of Cocodrie was increased by the addition of bensulfuron and halosulfuron compared with a single application of clomazone.

Information

Type
Research Article
Copyright
Copyright © Weed Science Society of America 

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