Indian Journal of Agronomy
Year : 2001, Volume : 46, Issue : 2
First page : ( 327) Last page : ( 331)
Print ISSN : 0537-197X. Online ISSN : 0974-4460.

Effect of pre-emergence herbicides on weed control in soybean (Glycine max)

Kewat M.L.1, Pandey Jitendra

Division of Agronomy, Indian Agricultural Research Institute, New Delhi, 110012

¹ Present address: Department of Agronomy, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur, Madhya Pradesh 482004

Received:  May,  2000.

Abstract

A field experiment was conducted at the Indian Agricultural Research Institute, New Delhi, during the rainy seasons of 1995 and 1996, to evaluate the effect of pre-emergence herbicides on weed control in soybean [Glycine max (L.) Merr.]. All weed-control treatments reduced the weed biomass and population of all the weeds except Cyperus rotundus L. and Convolvulus arvensis L. Pre-emergence application of Metribuzin at low dose (0.5 kg/ha) lowered the weed population and weed biomass than that of pendimethalin (1.0 and 1.5 kg/ha) and it was as good as 2 hand-weedings done 20 and 40 days after sowing. But application of Metribuzin at higher dose (0.75 kg/ha) had a little phytotoxic effect on soybean seedlings. The former registered the maximum seed yield (23.42 q/ha), net monetary return (Rs 9,590/ha) and benefit: cost ratio (2.22) among all the weed-control treatments. Weed-control treatments proved more remunerative than weedy check.

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Keywords

Pendimethalin, Metribuzin, Weed control, Soybean, Economics.

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