Use of Portable Devices and an Innovative and Non-Destructive Index for In-Field Monitoring of Olive Fruit Ripeness

A new non-destructive index of absorbance difference (IAD), calculated with different wavelengths as references, near the chlorophyll peak or that for anthocyanin, has been used to determine fruit ripening several species using portable devices such Standard DA-Meter® and Kiwi-Meter®. In this study, first time, application IAD was evaluated on single, intact olives Leccino cultivar, a single maturity follow in field, directly tree. The determined by both found be useful monitoring olive ripening, however, better performance achieved fact, device more effective at measuring all studied parameters calibration validation datasets acceptable accuracy. Specifically, IDA Kiwi-Meter® observed estimation color (R2 = 0.817, DRMSEC 0.404 RPIQ 3.863 R2 0.752, DRMSECV 0.574 3.244 validation), confirming its potential evaluating degree ripeness. This novel significant applicative possibilities, since it would allow rapid, on-site screening best harvesting time improve production terms yield quality.