Modeling Fruit Growth of ‘Triunfo’ Pear Grown in North Espírito Santo State

The objective of this study was to obtain mathematical models to estimate non-destructively the fruit mass of pear cv. 'Triunfo'. To this end, 128 fruits from all developmental stages collected at three different times were used. Fruits were measured for maximum length (L), maximum width (W) and observed mass (OM). For the adjustment, with a sample of 100 fruits, the models first degree linear, quadratic and power were tested, in which the OM was used as the dependent variable in function of L and W. From a sample of 28 fruits, separated for this purpose the equations were validated. Thus, it indicates an equation of the quadratic model represented by EM = 36.020218 - 3.067232(W) + 0.082568(W)2 using from the measurement of the largest fruit width (W), as the most accurate to estimate the fruit mass of pear cv. 'Triunfo'.