An experimental trail was conducted at Bihar Agricultural College, Sabour,
Bhagalpur during 2021-22 to find the bio-efficacy of pre and post-emergency of herbicides
under rainfed conditions in north Bihar (India). The significantly higher chickpea seed yield
(1.74 t ha -l ) and net return (₹ 72564 ha -l ) were recorded with application of topramezone @
25 g ha -l at 25 DAS over unweeded check (0.98 t ha -l ₹ 33558 ha -l ) respectively and remained
at par with pendimethalin @ 1000 g ha -l as PE fb 1 hand weeding (HW) 30 DAS (1.73 t ha -l ,
₹ 69826 ha -l ), oxyfluorfen @ 100 g ha -l as PE fb 1 HW at 30 DAS (1.67 t ha -l , ₹ 67439 ha -l ),
topramezone @ 20 g ha -l at 25 DAS (1.66 t ha -l , ₹ 69306 ha -l ) and pendimethalin @ 1000 g
ha -l as PE fb quizalofop-ethyl @ 50 g ha -l at 25 DAS (1.58 t ha -l , ₹ 64859 ha -l ) respectively
whereas maximum plant height (21.70 cm) dry matter accumulation (42.24 g m -2 ) and no of
pods plant -l (25.16) were recorded with application of pendimethalin @ 1000 g ha -l as PE fb
1 HW at 30 DAS and seed index of chickpea was recorded non-significant.