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- Title
Dissipation of chlorantraniliprole, chlorpyrifos-methyl and indoxacarb-insecticides used to control codling moth ( Cydia Pomonella L.) and leafrollers ( Tortricidae) in apples for production of baby food.
- Authors
Szpyrka, Ewa; Matyaszek, Aneta; Słowik-Borowiec, Magdalena
- Abstract
Dissipations of three insecticides: chlorantraniliprole, chlorpyrifos-methyl and indoxacarb in apples were studied following their foliar application on apples intended for production of baby food. The apples were sprayed with formulations for control of codling moth ( Cydia Pomonella L.) and leafrollers ( Tortricidae). Six experiments were conducted; each insecticide was applied individually on dessert apples. A validated gas chromatography-based method with simultaneous electron capture and nitrogen-phosphorus detection (GC-ECD/NPD) was used for the residue analysis. The analytical performance of the method was satisfactory, with expanded uncertainties ≤36% (a coverage factor, k = 2, and a confidence level of 95%). The dissipations of insecticides were studied in pseudo-first-order kinetic models (for which the coefficient of determination, R , ranged between 0.9188 and 0.9897). Residues of studied insecticides were below their maximum residue limits of 0.5 mg/kg at an early stage of growth of the fruit. The half-lives of chlorantraniliprole, chlorpyrifos-methyl and indoxacarb were 16-17, 4-6 and 20-24 days, respectively. The initial residue levels declined gradually and reached the level of 0.01 mg/kg in 1 month for chlorpyrifos-methyl, 2 months for chlorantraniliprole and 2.5 months for indoxacarb. To obtain the insecticide residue levels below 0.01 mg/kg, which is the default MRL for food intended for infants and young children, the application of the studied insecticides should be carried out at recommended doses not later then: 1 month before harvest for chlorpyrifos-methyl, 2 months for chlorantraniliprole and 2.5 months for indoxacarb.
- Subjects
APPLE disease &; pest prevention; INSECT pest control; CHLORANTRANILIPROLE; CHLORPYRIFOS-methyl; INSECTICIDE application; CODLING moth; LEAFROLLERS
- Publication
Environmental Science & Pollution Research, 2017, Vol 24, Issue 13, p12128
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-017-8821-z