During the mechanical handling, the major causes of fresh fruit’s pulp tissues damage are the impact of fruit with working surfaces and/or between themselves. Because of the natural variability of the fruit physical proprieties and the multiple factors involved in the process, recent studies shows that the impact damage susceptibility of an apple population can be statistically described by the damage probability, and the correlation between this and the impact level can be correctly expressed through a logistic function. With the data obtained in our experiments done on a 36 Jonathan apple population, subjected to controlled impacts using the pendulum method, was tested the logistic function. It was determined that the impact damage probability can be correctly described by the logistic type function and the most adequate physical propriety for the impact level can be considered Eci. For X = Eci, was found C = –2.429; m = 9.939 and a correlation coefficient R2 = 0.976.The relation is useful not only for prediction of the maximum threshold impact level X for an admissible damage probability (5% or max. 10% in accordance with E.U. standards), but for the anticipation of the damage probability in case of a known value for the impact level X.
