Vol. 11, Issue 10 (2022)

Author(s):
RK Satyaraj Guru, Sanjay K Dwivedi and MC Bhambri

Abstract:
A field experiment was conducted during Kharif 2020 and 2021 at Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh to evaluate efficacy of different weed management practices in managing weeds in direct-seeded rice (Oryza sativa L.). The weed species Echinochloa colona, Cyperus iria and Alternanthera sessilis were found dominant among the grasses, sedges and broad leave weeds during both years. Among the integrated weed management practices, the lowest weed biomass and maximum weed control efficiency, were computed in the OD fb MW (20 DAS) fb HW (40 DAS) (T4) treatment at 60 DAS. The maximum growth parameters value were recorded under the WF (20, 40 and 60 DAS) (T13) treatment at 60 DAS. No significant difference in SPAD value was observed at 60 DAS. The highest grain yield was recorded under the WF (20, 40 and 60 DAS) (T13) treatment, which was found at par with the OD fb HW (20 and 40 DAS) (T3), OD fb MW (20 DAS) fb HW (40 DAS) (T4), MW+IHW (15 and 35 DAS) (T12) and OD fb BS (20 DAS) (T5) treatments. The maximum and minimum B:C ratio were computed under the OD fb BS (20 DAS) (T5) and weedy check (T14) treatments, respectively.