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Abstract                 Volume:4  Issue-3  Year-2016          Original Research Articles


Online ISSN : 2347 - 3215
Issues : 12 per year
Publisher : Excellent Publishers
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Bioassay Techniques for Dose Determination of Non-Traditional Herbicides in Cowpea (Vigna unguiculata (L) Walp.)
Saikat Chongdar, Anwesh Rai*, Amit Ghosh, Koushik Patra and Pijush Kanti Mukherjee
Department of Agronomy, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar – 736165, West Bengal, India
*Corresponding author
Abstract:

Alachlor is a selective pre-emergence herbicide in legume crops. However, limited availability of these herbicides and widely availability of other (rice) herbicides (Butachlor and pretilachlor) led to need about the use of non-tradition herbicides for controlling weeds. With this view the field experiment was undertaken with the objectives to study bio-efficacy of non-traditional herbicides in cowpea and to work out selectivity index (SI) value and doses for controlling mixed weed flora through bioassay technique. Results generated through the experiment indicated that the pre-emergence application on non-traditional herbicides like butachlor @ 0.77 kg ha-1 and pretilachlor @ 0.42 kg ha -1 can be applied as pre-emergence treatment in cowpea to achieve control over the weeds. However, among these two herbicides butachlor has higher degree of selectivity than pretilachlor.

Keywords: Selectivity index (SI) value, Bioassay, Pre-emergence,Non-traditional herbicides,  cowpea
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How to cite this article:

Saikat Chongdar, Anwesh Rai, Amit Ghosh, Koushik Patra and Pijush Kanti Mukherjee. 2016. Bioassay Techniques for Dose Determination of Non-Traditional Herbicides in Cowpea (Vigna unguiculata (L) Walp.).Int.J.Curr.Res.Aca.Rev. 4(3): 178-182
doi: http://dx.doi.org/10.20546/ijcrar.2016.403.019