Efficacy of herbicides on weeds and yield of greengram

Gupta, Varsha; Sharma, Sandeepna; Sasode, Deep Singh; Joshi, Ekta; Kasana, B.S.; Joshi, Neeshu

Efficacy of herbicides on weeds and yield of greengram

2019

The field experiments were conducted during Kharif 2016 and 2017 at Research Farm, College of Agriculture, RVSKVV, Gwalior (M.P.) to study the effective herbicide/combination of herbicides to control the problematic weeds in greengram (Vigna radiata). The experiments were laid out with ten treatments, viz. quizalofop-p-ethyl 50, 75 and 100 g/ha PoE, fenoxaprop-p-ethyl 100 g/ha PoE, pendimethalin 1000 g/ha pre-emergence (PE), pendimethalin + imazethapyr (RM) 750 and 1000 g/ha PE, imazethapyr + imazamox (RM) 80 g/ha PoE, two hand weeding at 20 and 40 DAS and weedy check in a randomized block design. The combination of imazethapyr + imazamox (RM) 80 g/ha applied as postemergence was found to be very efficient in controlling the dominant grassy as well as broad-leaved weeds and produced maximum seed yield (993 kg/ha), and was at par with two hand weedings at 20 and 40 DAS (983 kg/ha) and combination of pendimethalin + imazethapyr 750 g/ha and 1000 g/ha PE (844 and 758 kg/ha, respectively). Application of imazethapyr + imazamox (RM) 80 g/ha PoE resulted in the highest B:C ratio (3.03), and net returns, fb pendimethalin + imazethapyr 750 g/ha PE and two hand weeding at 20 and 40 DAS.

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