Effect of weed management practices on weed dynamics in clusterbean [Cyamopsis tetragonoloba (L.) Taub]

Abstract

A field experiment was conducted to find out the effect of weed management practices on weed dynamics in clusterbean [Cyamopsis tetragonoloba (L.) Taub]. The experiment was carried out during kharif season of 2018 and ten treatment combination of different herbicides were replicated thrice in RBD. Results revealed that the early post-emergence application of imazethapyr + imazamox 50 g/ha + HW at 35 DAS was found the most effective treatment which recorded lowest density of narrow and broad leaved weeds and minimum weed dry matter at all growth stages. This treatment also recorded significantly higher seed yield (1180 kg/ha) with higher weed control efficiency (92.8%) and lowest weed competition index (4.6%). This practice of weed management was statistically at par with weed free season long plots and another treatment of application of imazethapyr 40 g/ha at 20 DAS + HW at 35 DAS.