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Rhizopus stolonifer Detection by sensing the Tomato Peduncle Scar

Authors :
Federico Hahn
Source :
Biosystems Engineering. 95:171-179
Publication Year :
2006
Publisher :
Elsevier BV, 2006.

Abstract

Eighty per cent of the total tomato postharvest losses in pre-packaged and loose tomato fruits in Mexico were caused by Alternaria rot and Rhizopus rot. A sensor was developed to detect Rhizopus stolonifer infected tomatoes using three relative humidity sensors. Green and red mature tomatoes were inoculated with R. stolonifer conidia on a wound and stored for 5 days. A small extractor sucked moist air from the tomato peduncle scar through a measuring cavity. The relative humidity of air exiting from the peduncle scar was differentiated from the ambient air relative humidity and amplified in order to obtain a value which could predict infected tomatoes. A compression surface applied a controlled pressure to green and red infected tomatoes which were detected with accuracies of 91 and 89%, respectively. Peduncle scar measurements are more useful as infected tomatoes can be monitored non-dependent on its maturity stage and within all the fruit.

Details

ISSN :
15375110
Volume :
95
Database :
OpenAIRE
Journal :
Biosystems Engineering
Accession number :
edsair.doi...........16049dd628a87c6b04f4f578dd70853b
Full Text :
https://doi.org/10.1016/j.biosystemseng.2006.06.010