Volume 2 Issue 1

Bio-efficacy of some new herbicides for eco-safe weed management in wheat (Triticum aestivum L.)

Author(s): KIRONMAY BARUI, AMARESH KHUNTIA, SUBRATA KUMAR GHOSH, PRITAM GHOSH AND DIPALI MONDAL

Abstract: A field experiment was conducted at Kalyani to find out an effective eco-safe herbicide for controlling weeds in wheat during winter ' 2003 and 2004. Eleusine indica, Echinoch/oa co/ona and Digitaria sanguinalis among the grasses, Meli lotus alba, Chenopodium album, Vicia hirsuta and Gnapha/ium luoteoalbum among broad-leaf weeds and Cyperus rotundus among the sedge were found dominant in the experimental plot during both the year. Hand weeding twice
resulted in lowest weed density and weed biomass followed by clodinafop + 2,4 DEE. Hand weeding recorded the highest grain yield followed by clodinafop + 2,4 DEE treatment, which were 48.1% and 38.9% higher over weedy check respectively. Among the herbicidal treatments, clodinafop + 2, 4 DEE yielded maximum followed by sulfosulfuron,
isoproturon, pendimethalin respectively. All the herbicides significantly reduced the microbial population upto 15 days after application but recovered thereafter.

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