Performance of Different Herbicides in Dry-Seeded Rice in Bangladesh. (6th February 2014)

• Record Type: Journal Article
• Authors: Ahmed, Sharif; Chauhan, Bhagirath Singh
• Other Names: Ma W. Academic Editor.; Mian R. M. Academic Editor.; Miao Y. Academic Editor.; Takamizo T. Academic Editor.
• Is Part Of: TheScientificWorldjournal. Volume 2014(2014)
• Publication Date: 2014-02-06
• Subjects: Science -- Periodicals; Technology -- Periodicals; Medicine -- Periodicals; 505
• DOI: 10.1155/2014/729418
• Languages: English
• ISSNs: 2356-6140

Abstract

Abstract : A field study was conducted in the boro season of 2011-12 and aman season of 2012 at Jessore, Bangladesh, to evaluate the performance of sequential applications of preemergence herbicides (oxadiargyl 80 g ai ha −1, pendimethalin 850 g ai ha −1, acetachlor + bensulfuranmethyl 240 g ai ha −1, and pyrazosulfuron 15 g ai ha −1 ) followed by a postemergence herbicide (ethoxysulfuron 18 g ai ha −1 ) in dry-seeded rice. All evaluated herbicides reduced weed density and biomass by a significant amount. Among herbicides, pendimethalin, oxadiargyl, and acetachlor + bensulfuranmethyl performed very well against grasses; pyrazosulfuron, on the other hand, was not effective. The best herbicide for broadleaf weed control was oxadiargyl (65–85% control); pendimethalin and acetachlor + bensulfuraonmethyl were not effective for this purpose. The best combination for weed control was oxadiargyl followed by ethoxysulfuron in the boro season and oxadiargyl followed by a one-time hand weeding in the aman season. Compared with the partial weedy plots (hand weeded once), oxadiargyl followed by ethoxysulfuron (4.13 t ha −1 ) provided a 62% higher yield in the boro season while oxadiargyl followed by a one-time hand weeding (4.08 t ha −1 ) provided a 37% higher yield in the aman season.