Alessandro D. Mota, Giuliano Rossi, Guilherme Cunha de Castro, Tiago A. Ortega, Jarbas C. de Castro N.
Proceedings Volume Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVIII, 90031U (2014) https://doi.org/10.1117/12.2051361
In this work, the development of a portable fluorescence spectroscopy platform for Huanglongbing (HLB) citrus disease in situ detection is presented. The equipment consists of an excitation blue LED light source, a commercial miniature spectrometer and embedded software. Measurements of healthy, HLB-symptomatic and HLB-asymptomatic citrus leafs were performed. Leafs were excited with the blue LED and their fluorescence spectra collected. Embedded electronics and software were responsible for the spectrum processing and classification via partial least squares regression. Global success rates above 80% and 100% distinction of healthy and HLB-symptomatic leafs were obtained.
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