title: Dissipation kinetics of alpha-cypermethrin and lambda-cyhalothrin residues in aboveground part of white mustard (Sinapis alba L.).
abstract: Dissipation of simultaneously applied insecticides alpha-cypermethrin and lambda-cyhalothrin was studied in a minor crop, aboveground part of white mustard (Sinapis alba L.). A validated gas chromatographic method (GC-ECD/NPD) was used to determine insecticide residues. Analytical performances were very satisfactory, with expanded uncertainties not higher than 14% (coverage factor k = 2, confidence level 95%). Dissipation of alpha-cypermethrin and lambda-cyhalothrin in white mustard followed first-order kinetics (R(2) between 0.953 and 0.995), with half-lives of 3.1-4.6 and 2.9-3.7 days respectively. Based on the results of this two-year study and the relevant residue regulation, alpha-cypermethrin and lambda-cyhalothrin treatments can be considered safe for crop protection, feeding animals and the environment.
authors.affiliation: a Regional Experimental Station, Laboratory of Pesticide for Residue Analysis, Institute of Plant Protection-National Research Institute , Rzeszów , Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Słowik-Borowiec
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D006207:Half-Life; D007306:Insecticides / Q000032:analysis / Q000493:pharmacokinetics*; D007700:Kinetics; D009570:Nitriles / Q000032:analysis / Q000493:pharmacokinetics*; D010573:Pesticide Residues / Q000032:analysis / Q000493:pharmacokinetics*; D011722:Pyrethrins / Q000032:analysis / Q000493:pharmacokinetics*; D011897:Random Allocation; D031226:Sinapis / Q000378:metabolism*
chemical_list: D007306:Insecticides; D009570:Nitriles; D010573:Pesticide Residues; D011722:Pyrethrins; C017160:cypermethrin; C037304:cyhalothrin
keywords: Dissipation; alpha-cypermethrin; lambda-cyhalothrin; pesticide residues; white mustard