Bentazon, (3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-l-2,2-dioxide) a new experimental herbicide, was studied under the effects of sterile and non-sterile conditions, 12 hours light: 12 hours dark and totally dark conditions, and agitated and non-agitated conditions in aquatic sediment. The effects of the different levels of BOD/COD values on the decomposition of Bentazon were studied. Photoperiod, sterility, and BOD/COD levels appeared to have no influence in the breakdown of Bentazon. Agitation-time interaction appeared to be the only factor that influenced the more rapid degradation of Bentazon. Bentazon was the major 14C-residue found in the water; it was followed by an unknown. The third major metabolite was 2-amino-N-isopropyl benzamide, followed by anthranilic acid and N-isopropylsulfamoyl anthranilic acid at minor amounts. Only Bentazon was found in the soil. The ratio of radioactivity in the soil vs. the water was 1:1 in the agitated tanks and 1:3 in the non-agitated tanks. After 128 days, the concentration of Bentazon in the water decreased to an average of 50% in the agitated tanks and an average of 80% in the non-agitated tanks.
College and Department
Plant and Wildlife Sciences
BYU ScholarsArchive Citation
Gutierrez, David Cortez, "Metabolism of 3-isopropyl-4H-2,1,3-benzothiadiazin-4-(3H)-one-2,2-dioxide (bentazon) in agitated and non-agitated sediment" (1974). Theses and Dissertations. 7940.
Herbicides; Biodegradation; Pesticides; Environmental aspects; Bentazon