Nondestructive detection of potato tubers internal defects: critical insight on the use of time resolved spectroscopy
Abstract: Aiming at investigating the feasibility of time¬resolved reflectance spectroscopy (TRS) for the non¬destructive detection of internal brown spot (IBS) and other defects in ‘El Beida’ potatoes, 90 tubers were measured in 8 points by TRS for the absorption coefficient at 730 nm (µa 730) and then transversally cut open for recording presence and position of internal defects and IBS severity. The µa 730 was lower in healthy tissue than in defected ones and increased with increasing IBS severity with no difference between healthy and slightly IBS tissues. Tubers having at least one out of the eight µa 730 measures ?0.04262 cm¬1 were considered “defected”. Therefore, TRS tubers classification performance were: defected, 73.5%; healthy, 45.5%; slightly IBS, 57.1%; moderate IBS, 60%; and severe IBS, 100% of the cases. Misclassification could be due
to the high variability in flesh color of ‘El Beida’ potatoes, as some healthy tubers showed L*, b* and C* color parameters very similar to that of defected ones, especially when IBS severity was slight or moderate, resulting in µa 730 values not significantly different between healthy and IBS tissues. The feasibility of TRS in detecting internal disorders in potatoes must be investigated in other susceptible cultivar to see if flesh color can represent a real problem in the detection of defects linked to browning development.
Publication year 2020
Pages 43-51
Organization Name
Author(s) from ARC
External authors (outside ARC)
    أ. د. آنا ريزولو أستاذ مساعد بمعهد البحوث الزراعية – ميلانو.
    د. مارستيلا فانولى - باحث بمعهد البحوث الزراعية – ميلانو.
    م. موريسيو جارسيا - تقنى بمعهد البحوث الزراعية – ميلانو.
    م. فابيو لافيتا تقنى بمعهد البحوث الزراعية – ميلانو
    ا.د. اليساندرو تورشيلى استاذ بقسم الفيزياء الجامعة التكنولوجيه – ميلانو ايطاليا
    ا.د. لورانزو اسبانيلى - استاذ بقسم الفيزياء الجامعة التكنولوجيه – ميلانو ايطاليا
Publication Type Journal
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