title: Dissipation and residues of fluroxypyr-meptyl in rice and environment.
abstract: A simple and reliable analytical method for analysis of fluroxypyr-meptyl residue in rice, soil and water was investigated. The residue levels and dissipation rates of fluroxypyr-meptyl (34% AS) were determined by GC-MSD in selected ion monitoring mode. In the supervised field trials, the half-life of fluroxypyr- meptyl in rice plant was in the range 1.25-4.13 days. The half-lives of fluroxypyr-meptyl in soil and water were 2.29 and 1.73 days, respectively. In order to assess the dissipation of fluroxypyr-meptyl in the environment, a laboratory simulated experiment was carried out in soil and water. The terminal residues of fluroxypyr-meptyl in rice plant, husked rice, rice hull and soil samples were undetectable at harvest. It showed that fluroxypyr-meptyl may be safe to use according to the recommended dosage suggested by the corporation.
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.forename: Pengyue
authors.initials: P
authors.lastname: Zhao
authors.forename: Canping
authors.initials: C
authors.lastname: Pan
mesh_terms: D000085:Acetates / Q000032:analysis / Q000378:metabolism; D004785:Environmental Pollutants / Q000032:analysis* / Q000378:metabolism; D005618:Fresh Water / Q000737:chemistry; D006016:Glycolates / Q000032:analysis* / Q000378:metabolism; D006540:Herbicides / Q000032:analysis* / Q000378:metabolism; D012275:Oryza / Q000737:chemistry* / Q000378:metabolism; D010573:Pesticide Residues / Q000032:analysis* / Q000378:metabolism; D011725:Pyridines / Q000032:analysis / Q000378:metabolism; D012987:Soil / Q000737:chemistry
chemical_list: D000085:Acetates; D004785:Environmental Pollutants; D006016:Glycolates; D006540:Herbicides; D010573:Pesticide Residues; D011725:Pyridines; D012987:Soil; C078450:fluroxypyr methylheptyl ester; C416382:4,5-amino-3,5-dichloro-6-fluoro-2-pyridinyloxyacetic acid