Dissipation kinetics of alpha-cypermethrin and lambda-cyhalothrin residues in aboveground part of white mustard (Sinapis alba L.) |
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Authors: | Magdalena Słowik-Borowiec |
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Affiliation: | Regional Experimental Station, Laboratory of Pesticide for Residue Analysis, Institute of Plant Protection–National Research Institute, Rzeszów, Poland |
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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 (R2 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. |
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Keywords: | Dissipation pesticide residues alpha-cypermethrin lambda-cyhalothrin white mustard |
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