EFFECT OF HERBICIDES AND THEIR COMBINATION ON GROWTH, YIELD AND ECONOMICS OF SUMMER GREENGRAMA. Hari, C.K. Bharathan, M. Kaur, G.E. Jolly, S.D. Singh1 and M.SinghAbstract A field study regarding the effect and efficacy of herbicides and their combinations on weed and crop growth, crop yield and crop economics of summer green gram was conducted at Lovely Professional University, Phagwara, Punjab during summer season of 2021-22 in sandy loam soil. Least weed count was recorded with regularly hand weeded (weed free) plot followed by the treatment which was weeded at 20 days and 40 days after sowing (DAS). Under herbicidal treatments, pendimethalin (stomp) 1 kg a.i. ha-1 along with hand weeding (HW) @ 20th day resulted in lowest weed density also imazethapyr (pursuit) 75 g a.i. ha-1 in combination with quizalofop (turga super) 50 g a.i. ha-1 showed statistically similar results. Regular hand weeding (weed free) showed the maximum plant height (66.71cm), which was comparable with pendimethalin (stomp) 1 kg a.i. ha-1 + hand weeding (HW) @ 20thday (64.37cm) and imazethapyr (pursuit) 75 g a.i. ha-1 + quizalofop-ethyl (turga super) 50 g a.i. ha-1 (63.67cm). Highest seed yield was obtained under regular hand weeding (weed free) (1.18 t/ha) this result was on par with hand weeding (HW) @ 20th and 40th day after sowing(DAS) (1.17 t/ha) which was also comparable to pendimethalin (stomp)1 kg a.i ha-1 + hand weeding @ 20 days after sowing (1.12 t/ha) and imazethapyr (pursuit) 75 g a.i ha-1 + quizalofop-ethyl (turga super) 50 g a.i ha-1 (1.10 t/ha). Highest Benefit cost ratio (1.58) obtained with the application of imazethapyr (pursuit) 75 g a.i ha-1 along with quizalofop-ethyl (turga super) 50 g a.i ha-1. |