TY - JOUR ID - 71789 TI - Residues and Dissipation Kinetics of Two Imidacloprid Nanoformulations on Bean (Phaseolus vulgaris L.) under Field Conditions JO - Pollution JA - POLL LA - en SN - 2383-451X AU - Memarizadeh, N. AU - Ghadamyari, M. AU - Talebi, K. AU - Torabi, E. AU - Adeli, M. AU - Jalalipour, R. AD - Department of Pesticides Researches, Iranian Research Institute of Plant Protection, Tehran, Iran AD - Department of Plant Protection, University of Guilan, Rasht, Iran AD - Department of Plant Protection, University of Tehran, Karaj, Iran AD - Department of Chemistry, University of Lorestan, Khoramabad, Iran Institute of Chemistry and Biochemistry, Freie Universitat Berlin, Berlin, Germany Y1 - 2019 PY - 2019 VL - 5 IS - 4 SP - 871 EP - 878 KW - Pesticide nanoformulation KW - imidacloprid KW - dissipation kinetics KW - Pre-harvest interval DO - 10.22059/poll.2019.275929.582 N2 - The current study investigates the dissipation kinetics of two imidacloprid (IMI) nanoformulations (entitled: Nano-IMI and Nano-IMI/TiO2) on common bean (Phaseolus vulgaris) seeds under field conditions and compares them with 35% Suspension Concentrate (SC) commercial formulation. To do so, it sprays P. vulgaris plants at 30 and 60 g/ha within green bean stage, sampling them during the 14-day period after the treatment. Following extraction and quantification of IMI residues, dissipation data have been fitted to simple-first order kinetic model (SFOK) and to first-order double-exponential decay (FODED) models, with 50% and 90% dissipation times (DT50 and DT90, respectively) assessed along the pre-harvest interval (PHI). With the exception of Nano-IMI at 60 g/ha, other decline curves are best fitted to the FODED model. In general, dissipation is faster for Nano-IMI (at 30 g/ha: DT50 = 1.09 days, DT90 = 4.30 days, PHI = 1.23 days; at 60 g/ha: DT50 = 1.29 days, DT90 = 4.29 days, PHI = 2.95 days) and Nano-IMI/TiO2 (at 30 g/ha: DT50 = 1.15 days, DT90 = 4.40 days, PHI = 1.08 days; at 60 g/ha: DT50 = 0.86 days, DT90 = 4.92 days, PHI = 3.02 days), compared to 35% SC (at 30 g/ha: DT50 = 1.58, DT90 = 6.45, PHI = 1.93; at 60 g/ha: DT50 = 1.58 days, DT90 = 14.50 days, PHI = 5.37 days). These results suggest the suitability of Nano-IMI and Nano-IMI/TiO2 application at both rates in terms of their residues on P. vulgaris seeds. UR - https://jpoll.ut.ac.ir/article_71789.html L1 - https://jpoll.ut.ac.ir/article_71789_2cd09eaf479558832871f82f237c70a3.pdf ER -