Estación Experimental SIDAL, El Encanto 455 Dpto 203, Viña del Mar, Chile.
DATAChem Agrofood Group, Escuela de Ingeniería de Alimentos, Pontificia Universidad Católica de Valparaíso, Waddington 716, Valparaíso, Chile.
Food Chem. 2017 Apr 15;221:548-554. doi: 10.1016/j.foodchem.2016.11.140. Epub 2016 Nov 28.
The aim of this study was to evaluate the effect of pesticide formulations and fruit growth stages on the Pre-harvest Interval Period (PHI). Results showed that pesticide formulations did not affect the initial deposit and dissipation rate. However, the fruit growth stage at the application time showed a significant effect on the above-mentioned parameters. Fruit diameter increases in one millimeter pesticide dissipation rates were reduced in -0.033mgkgday (R=0.87; p<0.001) for grapes and -0.014mgkgday (R=0.85; p<0.001) for apples. The relation between solar radiation, air humidity and temperature, and pesticide dissipation rates were dependent on fruit type. PHI could change according to the application time, because of the initial amount of pesticide deposit in the fruits and change in the dissipation rates. Because Maximum Residue Level are becoming more restrictive, it is more important to consider the fruit growth stage effects on pesticide when performing dissipation studies to define PHI.
本研究旨在评估农药剂型和果实生长阶段对采收前间隔期（PHI）的影响。结果表明，农药剂型并不影响初始沉积量和消解速率。然而，施药时的果实生长阶段对上述参数有显著影响。在葡萄中，果实直径每增加 1 毫米，农药消解速率降低 0.033mgkgday（R=0.87；p<0.001），在苹果中降低 0.014mgkgday（R=0.85；p<0.001）。太阳辐射、空气湿度和温度与农药消解速率之间的关系取决于果实类型。由于果实中农药初始沉积量的变化以及消解速率的变化，施药时间可能会改变 PHI。由于最大残留限量变得更加严格，在进行消解研究以定义 PHI 时，考虑农药对果实生长阶段的影响更为重要。
