Persistence of Pretilachlor in Water at Different pH Levels

A laboratory experiment was conducted to study the persistence of pretilachlor (new formulation Rifit) in water at acidic, neutral and alkaline pH by incubating for 60 days in beakers. The degradation pattern of pretilachlor in the water samples indicated that, irrespective of pH, pretilachlor residues were detected upto 15 days after application and were below detectable limit on 30th day. The half -life of pretitachlor in different pH water varied from 3.05 to 3.30 days and there was not much difference in half- life due to increase or decrease in pH of irrigation water.