Vol. 8 No. 2
Bio-efficacy and phytotoxicity of new molecule herbicides for weed management in soybean
Author(s): S. BERA, D. PAL AND R. K. GHOSH
Abstract: Field experiment was conducted with 12 treatments replicated thrice following Randomized Block Design during consecutive two kharif seasons of 2008 and 2009. Weed flora in soybean consisted of Echinochloa colonum, Eleusine indica, Dactyloctanium aegyptium, Digitaria sanguinalis, Cyperus rotundus, Euphorbia hirta, Digera arvensis, Physalis minima, Phylanthus niruri, Alternanthera philoxeroides, and Amaranthus viridis. All weed control treatments significantly decreased population of grass, sedge and broadleaf weeds and their dry weight\'s over untreated control. No phytotoxic symptoms such as epinasty/hyponasty, leaf yellowing, necrosis, stunting growth, wilting etc. were exhibited. Considering the Net Production Value (NPV) it can be concluded that the treatment UPH-203 @ 100.0 g ha-1+Na-Acifluorfen 10%SL@ 206.2 g ha-1 was the best among all the treatments used in this experiment. Though twice hand weeding treatment recorded highest yield but it failed to obtain most profitable result in respect to NPV due to higher cost of cultivation particularly labour wages.
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