Indian Journal of Agronomy
Year : 2001, Volume : 46, Issue : 1
First page : ( 23) Last page : ( 26)
Print ISSN : 0537-197X. Online ISSN : 0974-4460.

Persistence of pendimethalin in soybean (Glycine max)-wheat (Triticum aestivum) sequence following pre-emergence application to soybean

Kewat M.L.1, Pandey Jitendra, Kulshrestha G.

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:  March,  2000.

Abstract

An investigation was conducted at the Indian Agricultural Research Institute, New Delhi, during the rainy (kharif) season of 1995 and 1996 to determine the persistence of pendimethalin in soil in soybean [Glycine max (L.) Merr.]-wheat (Triticum aestivum L. emend. Fiori & Paol.) sequence following its application to soybean. In sandy-loam soil, the half-life of pendimethalin at 1.0 and 1.50 kg a.i./ha was 24 and 26 days respectively. The inital dissipation of pendimethalin was rapid and nearly 35–36% of the original value was lost in 15 days and thereafter it was gradual. Nearly 27–28% residues remained in the soil after 45 days of its application and ascertained safety to succeeding wheat crop, as the pendimethalin residues reached non-detectable level after the harvest of soybean.

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Keywords

Persistence, Pendimethalin, Dissipation, Half-life, Soybean-wheat sequece.

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