Abstract
Bentazone {3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one-2,2-dioxide} categorized under thiadiazine group is a selective herbicide that is widely used for weed control in cereals, onions, garlic and other related crops. Field and laboratory experiments were conducted for 5 weeks to assess some of the responses of Allium cepa (a non-target plant) to herbicide treatment. Growth, physiological, cytotoxic and genotoxic parameters were determined. The result showed that bentazone significantly decreased plant growth and protein content; while level of malondialdehyde increased by 56.25 %. Chromosomal aberration and DNA damage were also associated with bentazone treatment on A. cepa. It was concluded that bentazone herbicide could cause genotoxicity and physiological disorders in non-targeted plants.
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