Residue kinetics of neonicotinoids and abamectin in pistachio nuts under field conditions: model selection, effects of multiple sprayings, and risk assessment

التفاصيل البيبلوغرافية
العنوان: Residue kinetics of neonicotinoids and abamectin in pistachio nuts under field conditions: model selection, effects of multiple sprayings, and risk assessment
المؤلفون: Ebrahim Tavakoli, Ehssan Torabi, Mohammad Homayoonzadeh, Khalil Talebi Jahromi, Ali Olyaie Torshiz
المصدر: Environmental science and pollution research international. 29(2)
سنة النشر: 2021
مصطلحات موضوعية: Residue (complex analysis), Insecticides, Maximum Residue Limit, Ivermectin, Health, Toxicology and Mutagenesis, Pesticide Residues, General Medicine, Pesticide, Thiacloprid, Pollution, Risk Assessment, Toxicology, chemistry.chemical_compound, Kinetics, Neonicotinoids, chemistry, Imidacloprid, Pistacia, Abamectin, Environmental Chemistry, Humans, Nuts, Orchard, Thiamethoxam, Mathematics
الوصف: Pistachio is an economically valuable crop, and Iran is among the biggest producers, exporters, and consumers of this product in the world. During the growing season, pistachios are subjected to multiple sprayings with various pesticides, which result in the accumulation of their residues in nuts. These residues have raised concerns regarding consumers' health. In this research, uptake and dissipation kinetics of insecticides imidacloprid (IMI), thiacloprid (THI), thiamethoxam (THX), and abamectin (ABA) were investigated in pistachio nuts. Field experiments were conducted in a pistachio orchard. Pistachio trees were sprayed with the recommended dose of each insecticide formulation and water as the control. Samplings were performed for up to 49 days. Based on the results, pesticides uptake and dissipation kinetics were best fitted to first-order exponential growth (FOEG) and single first-order kinetic (SFOK) models, respectively. Variations in pesticides uptake/dissipation rates were mostly related to their water solubility, pKa, and log Kow. THX showed a higher uptake rate (0.16 ± 0.04) compared to IMI (0.10 ± 0.01) and THI (0.06 ± 0.01). The fastest dissipation rates were observed for IMI (0.04 ± 0.002 day-1) and THX (0.03 ± 0.001 day-1), while the slowest belonged to THI (0.02 ± 0.003 day-1). ABA residues were below the quantification limit (LOQ) throughout the experiment. Based on FOEG and SFOK model predictions, multiple sprayings with THI and THX resulted in final concentrations exceeding the maximum residue limit (MRL). Hazard quotients for all pesticides were
تدمد: 1614-7499
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cff354f1cda3b2109fe34479e384dd4
https://pubmed.ncbi.nlm.nih.gov/34370195
Rights: CLOSED
رقم الانضمام: edsair.doi.dedup.....1cff354f1cda3b2109fe34479e384dd4
قاعدة البيانات: OpenAIRE