Plant-Back Intervals of Imicyafos Based on Its Soil Dissipation and Plant Uptake for Rotational Cultivation of Lettuce and Spinach in Greenhouse

The plant-back intervals (PBIs) of imicyafos were investigated for rotational cultivation lettuce and spinach in greenhouses. Imicyafos dissipation soil its plant uptake evaluated by liquid chromatography-tandem mass spectrometry. Bioconcentration ratios (BCRs) calculated comparing the residues plants to initial residue soil. BCRs used calculate acceptable (SARs) transferable at Positive List System (PLS) level. number days, PBIs reaching SARs obtained from equation In soil, followed first order kinetics (R2 = 0.975) with a half-life 40.8 days. ranged 0.041 0.469 edible leaf parts 0.006 0.134 those spinach. 0.021 0.244 0.075 1.667 mg kg?1 estimated be 213.9 357.3 days 100.8 283.6 This study suggests least minimum 1-year interval after final application as management method that complies PLS