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

Nicola Cinosi, Silvia Portarena (), Leen Almadi, Annalisa Berrettini, Mariela Torres, Pierluigi Pierantozzi, Fabiola Villa, Andrea Galletti, Franco Famiani and Daniela Farinelli ()
Additional contact information
Nicola Cinosi: Department of Agricultural, Food and Environmental Sciences (DSA3), University of Perugia, Via Borgo XX Giugno 74, 06121 Perugia, Italy
Silvia Portarena: Institute of Research on Terrestrial Ecosystems (IRET), National Research Council (CNR), Via Marconi 2, 05010 Porano, Italy
Leen Almadi: Department of Agricultural, Food and Environmental Sciences (DSA3), University of Perugia, Via Borgo XX Giugno 74, 06121 Perugia, Italy
Annalisa Berrettini: Department of Agricultural, Food and Environmental Sciences (DSA3), University of Perugia, Via Borgo XX Giugno 74, 06121 Perugia, Italy
Mariela Torres: Instituto Nacional de Tecnología Agropecuaria (INTA), Ing. Marcos Zalazar (Calle 11) y Vidart. Villa Aberastain, Pocito, San Juan 5427, Argentina
Pierluigi Pierantozzi: Instituto Nacional de Tecnología Agropecuaria (INTA), Ing. Marcos Zalazar (Calle 11) y Vidart. Villa Aberastain, Pocito, San Juan 5427, Argentina
Fabiola Villa: Centro de Ciências Agrárias, Universidade Estadual do Oeste do Paraná (UNIOESTE), Marechal Cândido Rondon, Rua Pernambuco 1777, Paraná State, Brazil
Andrea Galletti: Sinteleia srl, Via di Corticella, 35, 40128 Bologna, Italy
Franco Famiani: Department of Agricultural, Food and Environmental Sciences (DSA3), University of Perugia, Via Borgo XX Giugno 74, 06121 Perugia, Italy
Daniela Farinelli: Department of Agricultural, Food and Environmental Sciences (DSA3), University of Perugia, Via Borgo XX Giugno 74, 06121 Perugia, Italy

Agriculture, 2023, vol. 13, issue 1, 1-13

Abstract: A new non-destructive index of absorbance difference (I AD ), calculated with different wavelengths as references, near the chlorophyll absorbance peak or that for anthocyanin, has been used to determine the fruit ripening of several fruit species using portable devices such as Standard DA-Meter ® and Kiwi-Meter ® . In this study, for the first time, the application of the I AD was evaluated on single, intact olives of the Leccino cultivar, as a single non-destructive maturity index to follow ripening in the field, directly on the tree. The I AD determined by both devices was found to be useful for monitoring the olive ripening, however, better performance was achieved with the Kiwi-Meter ® . In fact, the I AD determined by this device was more effective at measuring all the studied olive ripening parameters in the calibration and validation datasets with acceptable accuracy. Specifically, better performance of the I DA by Kiwi-Meter ® was observed in estimation of the color index (R 2 = 0.817, DRMSEC = 0.404 and RPIQ = 3.863 for calibration and R 2 = 0.752, DRMSECV = 0.574 and RPIQ = 3.244 for validation), confirming its potential for evaluating the degree of olive ripeness. This novel index has significant applicative possibilities, since it would allow rapid, on-site screening of the best harvesting time to improve the olive production in terms of both yield and quality.

Keywords: Olea europea L.; index of absorbance difference; Leccino cv.; color index; pulp firmness; oil content (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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