Effect of sowing management and herbicides on the weed dynamics of berseem (Trifolium alexandrinum)
Pushpendra Singh Yadav, ML Kewat, AK Jha, K. Sukumar V. Hemalatha, Badal Verma
Abstract
A two-year field experiment was conducted to assess the effect of different dates of sowing and chemical<br> weed control on the weed indices in berseem during the rabi seasons of 2020-2021 and 2021-2022 under<br> AICRP on Forage Crops, Department of Agronomy, College of Agriculture, Jabalpur (MP). Twenty<br> treatment combination comprising of four dates of sowing in main plots and five herbicidal control<br> treatments as sub- plot treatments were laid out in split- plot design and replicated thrice. The dominant<br> weed flora found in the experimental field was Chenopodium album, Cichorium intybus, Medicago<br> truncatula, Cyperus rotundus, Anagallis arvensis and Cuscuta reflexa. The results indicated that<br> Medicago truncatula and Cichorium intybus had highest relative density among all other weeds. The<br> early sowing of berseem on 15th October had lesser number of weeds as compared to delayed sowing i.e.<br> 30th October, 15th November and 30th November. The application of Oxyfluorfen 100 g/ha + Imazethapyr<br> 15 g/ha after first and second cutting resulted in lower weed density of most of the weeds, followed by<br> post emergence application of Oxyfluorfen 100 g ai/ha + Imazethapyr 15 g ai/ha after first cutting (55<br> DAS), Pyroxasulfone 125 g ai/ha as early post emergence (14 DAS), Pyroxasulfone 125 g ai/ha as pre<br> emergence over control treatment.