Bispyribac sodium is a selective, orally active, systemic and post-emergence herbicide. Bispyribac sodium reduces SOD levels and inhibits ALS activity. Bispyribac sodium blocks the biosynthesis of branched-chain amino acids, resulting in growth retardation, chlorosis and necrosis of weeds. Bispyribac sodium exerts herbicidal activity against grass, sedge and broadleaf weeds in rice fields. Bispyribac sodium is hepatotoxic and genotoxic[1][2][3][4].