This study aim to determine changes in weed composition, the most effective dose of herbicide, phytotoxicity levels, and yields of lowland rice due to the application of methyl metsulfurone herbicide. This research was carried out from March to August 2020 in Seridalam, Tanjung Raja, Ogan Ilir, South Sumatra. The study used a randomized block design with treatment P1 = methyl metsulfuron herbic…