Pesticide Residues and Environmental Pollution Department, Central Agricultural Pesticide Laboratory, Agricultural Research Center , Giza, Egypt.
Chemistry Department, Faculty of Science, Benha University , Benha, Egypt.
Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2020 Jun;37(6):973-982. doi: 10.1080/19440049.2020.1736342. Epub 2020 Mar 18.
Picoxystrobin is a synthetic strobilurin fungicide widely used in Egypt to control downy and powdery mildews, a risk that is significant also in cultivating strawberries. In the ccurrent work, the safety to consumers from the use of picoxystrobin in strawberries along with its residue behaviour was studied. Supervised field trials were conducted to investigate the residue dynamics and terminal residues of picoxystrobin in strawberries under Egyptian conditions for several agricultural practices including worst-case scenarios. For the measurement of residues in fruit, a QuEChERS-based protocol coupled with LC-MS/MS was employed and successfully validated at 0.001 mg kg. A decline of picoxystrobin residues in fruit fitted a first-order decay process with a calculated t of 5.4 days with a significant degradation (79%) after 14 days. A consumer risk assessment was performed employing both FAO/WHO and EFSA approaches, in which no significant health risks after consumption of strawberries were identified.
啶氧菌酯是一种广泛应用于埃及防治霜霉病和白粉病的合成啶酰菌胺杀菌剂，这种杀菌剂在草莓种植中也存在风险。在本研究中，评估了啶氧菌酯在草莓中的使用对消费者的安全性及其残留行为。在埃及的几种农业实践条件下进行了田间试验，包括最坏情况下的残留动态和啶氧菌酯在草莓中的最终残留情况。为了测量水果中的残留量，采用了基于 QuEChERS 的方法，并结合 LC-MS/MS 进行检测，该方法在 0.001mg/kg 时得到了成功验证。啶氧菌酯在水果中的残留量呈一级降解过程，半衰期为 5.4 天，14 天后降解率显著（79%）。采用 FAO/WHO 和 EFSA 方法进行了消费者风险评估，结果表明，草莓食用后不存在显著的健康风险。
