Quee, Dan David2026-10-192023-09-30Quee, D. D., Tarawallie, M. D., Saffa, M. D., Sillah, A., & Sundufu, A. J. (2023). Orange-fleshed potato cultivars’ responsiveness to herbicides and weed species interruption in Njala, Moyamba District, Southern Sierra Leone. World Journal of Advanced Research and Reviews, 19(3), 1421–1427. https://doi.org/10.30574/wjarr.2023.19.3.143510.30574/wjarr.2023.19.3.1435https://doi.org/10.30574/wjarr.2023.19.3.1435https://dspace.njala.edu.sl/handle/20.500.144402/1301The 2019 and 2020 field experiments were established to evaluate pre-emergence herbicides and weed interruption on orange-fleshed potato cultivars’ productivity. The experiment was executed at the Crop Protection Department trial site, Njala University Campus using a strip-plot design in three replications. Results indicated that Button (Diodia scandens) and Rushfoil (Croton hirtus) broadleaved weed species arose as the utmost predominant weed types that showed 58.52% and 25.68% relative density, respectively. Notwithstanding, Mathuthu orange-fleshed cultivar exhibited maximum weed competitive ability (5.14). The application of Prometraine (5 L ha-1) and hand weeding at 4 weeks after planting, revealed maximum herbicide efficiency index (20.65), yield (7.04 t ha-1), net field benefit (SLL 2,564.64), total variable cost (SLL 2,300.00) as well as profitability (113.48%). Therefore, application of Prometraine (5 L ha-1) and supplementary hand weeding at 4 weeks after planting may be acknowledged to farmers as an efficient and cost-effective weed management strategy in orange-fleshed potato cultivars’ productivity.enCC BY-NC-SApre-emergence herbicidesArticle