Dissipation of Imidacloprid in Greenhouse Cucumbers at Single and Double Dosages Spraying
عنوان مقاله: Dissipation of Imidacloprid in Greenhouse Cucumbers at Single and Double Dosages Spraying
شناسه ملی مقاله: JR_JASTMO-14-3_010
منتشر شده در در سال 1391
شناسه ملی مقاله: JR_JASTMO-14-3_010
منتشر شده در در سال 1391
مشخصات نویسندگان مقاله:
N. Hassanzadeh - Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Islamic Republic of Iran.
A. Esmaili Sari - Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Islamic Republic of Iran.
N. Bahramifar - Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Islamic Republic of Iran.
خلاصه مقاله:
N. Hassanzadeh - Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Islamic Republic of Iran.
A. Esmaili Sari - Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Islamic Republic of Iran.
N. Bahramifar - Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Islamic Republic of Iran.
In this study, residues of imidacloprid (Confidor) were measured in greenhouse cucumbers in Mazandaran Province, Iran. Confidor ۲۰۰ SL was applied at the recommended rate (۳۰.۰ g ai ha-۱) and its double (۶۰.۰ g ai ha-۱). Samples were collected at ۱ h to ۲۱ days after application and analyzed to determine the content and dissipation rate of Imidacloprid. . Analysis was carried out by the QuEChERS method using HPLC-UV. The average initial deposits of imidacloprid on the cucumber fruits were found to be ۱.۹۳ and ۳.۶۵ mg kg-۱ at the single and double dosages, respectively. Results showed that Imidacloprid was rapidly dissipated in cucumbers following a first order reaction kinetics at both application rates. The amount of dissipation in ۲۱ days was ۹۴.۴۸% and ۹۹.۱۸% for, respectively, the single and double dosages. Residues of imidacloprid dissipated below the maximum residue limit (MRL) of ۱ mg kg_۱ in ۳ days. Half-life (T۱/۲) for degradation of imidacloprid in cucumber was observed to be ۳.۴۰ and ۲.۷۰ days at the single and double dosages, respectively. A waiting period of ۳ days is suggested for safe consumption of cucumber. Also, results showed that the dissipation was dependent on the initial application dose and followed a first order rate kinetics.
کلمات کلیدی: Cucumber, Imidacloprid residue, Pre-harvest interval (PHI), QuECHERS method
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1827030/