Effect of sequential application of herbicides on the growth and yield of greengram (Vigna radiata L.)

Abstract

To study the effect of sequential application of herbicides on weed infestation, growth, yield attributes, and quality of greengram var. PDM-139 (Samrat), a n experiment was conducted in Random Block design using twelve treatments viz., Oxyfluorfen 23.5%EC 125 g; Pendimethalin 30% EC 1000g, Imazethapyr 10% EC 100 g, Oxyfluorfen 23.5%EC 125 g and fb Quizalofop -p-ethyl 5% EC 50 g, Pendimethalin 30% EC 1000g and fb Quizalofop-p -ethyl 5% EC 50g, Imazethapyr 10% EC 100 g and fb Quizalofop-p-ethyl 5% EC 50g, Oxyfluorfen 23.5%EC 125 g and fb H W at 40 DAS, Pendimethalin 30% EC 1000g and fb HW at 40 DAS, Imazethapyr 10% EC 100 g and fb HW at 40 DAS, and Propaquizofop 10% EC 100 ml per hectare, Hand weeding at 20 and 40 DAS and weedy check . Different weed infestation, growth, yield attributes, and quality of green gram were recorded at 60 DAS. The highest dry weight of total weeds was recorded under the weedy check treatment and The plant height was significantly more (20.5 cm) and test weight (20.73) was highest with the hand weeding followed by treatment imazethapyr 10% EC at 1000 g ha-1 followed by HW at 40 DAS and among the different weed control treatments influenced the net returns and the benefit-cost ratio was maximum with an application of imazethapyr 10% EC at 1000 g ha-1 It can be concluded that the application of Imazethapyr 10 % EC fb hand weeding at 40 DAS proved superior with respect to grain yield and economics of the green gram.