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Related Experiment Video

Updated: Jun 20, 2026

Fruit Volatile Analysis Using an Electronic Nose
11:02

Fruit Volatile Analysis Using an Electronic Nose

Published on: March 30, 2012

Finding Hidden Huanglongbing using an Electronic Nose.

Anthoni Sulthan Harahap, Siti Subandiyah, Iman Rahman

    Pakistan Journal of Biological Sciences : PJBS
    |June 19, 2026
    PubMed
    Summary
    This summary is machine-generated.

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    An electronic nose (e-nose) system effectively detects Huanglongbing (HLB) in citrus leaves using Volatile Organic Compound (VOC) analysis. This rapid screening tool aids in early disease management by identifying infected plants for further testing.

    Area of Science:

    • Plant Pathology
    • Analytical Chemistry
    • Sensor Technology

    Background:

    • Huanglongbing (HLB) is a devastating citrus disease globally.
    • Asymptomatic infection phases challenge timely HLB detection and control.
    • Early detection is crucial for effective citrus crop management.

    Purpose of the Study:

    • To develop and assess a compact electronic nose (e-nose) system for early HLB detection.
    • To analyze Volatile Organic Compounds (VOCs) from citrus leaves for infection markers.
    • To evaluate the e-nose system under field-like conditions for Candidatus Liberibacter asiaticus detection.

    Main Methods:

    • Collected 454 citrus leaf samples, confirming infection via PCR.
    • Utilized a metal-oxide semiconductor (MOS) sensor array for VOC analysis.
    Keywords:
    Huanglongbingasymptomaticelectronic nosehyperparameter tuningplant disease detection

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  • Applied machine learning algorithms for signal processing and classification.

    • Main Results:

    • Achieved 84.57% accuracy in distinguishing infected from healthy leaves using the Extra Trees algorithm.
    • Validated VOC profiles with headspace gas chromatography-mass spectrometry (HS-GC/MS).
    • Demonstrated successful discrimination under field-like conditions.

    Conclusions:

    • The e-nose shows potential as a rapid, in-field screening tool for HLB.
    • This technology can prioritize samples for laboratory confirmation.
    • Supports enhanced management strategies for citrus Huanglongbing.