Effect of different herbicide on ricebean (Vigna umbellata) under Terai region of West Bengal

Abstract

A field experiment was conducted during the post - kharif season of 2013 at Instructional Farm of U.B.K.V, Pundibari, Cooch Beahar, W.B. to study the “Integrated weed management practices in Ricebean (Vigna umbellata) under rainfed condition’’ with the following objectives: i) to identify the efficiency of Pendimethalin & Butachlor as pre-emergence, Quizalofop-p-ethyl as post-emergence herbicide in ricebean under Terai Agro - Climatic situation (ii) to assess the performance of pre -emergence application of herbicide as compared to the standard hand weeding/ hoeing in controlling weeds of ricebean and (iii) work out the economics of various treatments for ricebean cultivation. The field experiment was carried out in Randomized block design, having eleven (11) treatments with three replications. Finally, it may be concluded that highest weed control efficiency was recorded under hand weeding twice (T7) followed by pre-emergence application of Pendimethalin along with one hand weeding at 30 DAS (T5). Hand weeding (once) at 20 DAS & wheel hoeing once at 30 DAS (T9) and Pre- emergence applications of Butachlor @ 1kg a.i / ha with one hand weeding at 30 DAS (T2). Hand weeding once at 30 DAS (T6), Wheel hoeing twice at 20 & 30 DAS (T8), Pendimethalin (Stomp- extra 38.7% E.C) as Pre-emergence @ 1.0 kg a.i/ ha (T4) and Post-emergence application of Quizalofop-p- ethyl (Turga super) @ 60 g ha-1 at 20 DAS ( T3).