Author(s): Y. KUMAR, R. SAXENA, K. C. GUPTA, V. D. FAGARIA AND R. SINGH

Abstract: Field experiment was conducted during three consecutive kharif seasons of 2008, 2009 and 2010 at the Research Farm of Rajasthan Agricultural Research Institute, Jaipur in search of an effective and economic weed control tactics in groundnut through integration of post emergence herbicides. Pre-emergence application of pendimethalin @1kg a.i. ha-1 + 1 hand weeding + post emergence application of imazethapyr @ 50g a.i. ha-1 at 20 days after sowing produced higher pod yield (4147 kg ha-1) than other treatments. Haulm yield was highest in pendimethalin + 1 hand weeding at 45 days after sowing. Highest weed control efficiency (88.25%) was recorded with pendimethalin + one hand weeding at 45 DAS + imazethapyr @ 50g a.i. ha-1 at 20 DAS. The highest benefit:cost ratio (4.96) was obtained from the application of pendimethalin + one hand weeding at 45 DAS.

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