1AINP on Pesticide Residues,
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*Address for correspondence Rajib Karmakar, AINP on Pesticide Residues, Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Directorate of Research, Research Complex Building, Kalyani, Nadia, West Bengal, India. Email: Rajibc183@rediffmail.com
The dissipation kinetics of propaquizafop [2-isopropylideneamino-oxyethyl (R)-2-{4-(6-chloroquinoxalin-2-yloxy) phenoxy} propionate] was studied in water at three different pH (4.0, 7.0 and 9.2) along with two doses (1 and 2 μg ml−1) under laboratory condition. The water samples at regular intervals were collected, extracted and analyzed upto 90 days. The initial deposits of propaquizafop at different pH ranged from 0.31μg ml−1 to 0.90 μg ml−1 and 0. 48 μg ml−1 to 1.78 μg ml−1 respectively for lower and higher dose. The half-life of propaquizafop varied from 1.66 days to 75.25 days and dissipation was found to be dependent on pH irrespective of doses.
Propaquizafop, residue, dissipation, pH, water
