Electrical Analysis of Oil Palm Leaves Infected by Basal Stem
Alfadhl Yahya Khaled1, Samsuzana Abd Aziz*,1, Siti Khairunniza Bejo1, Nazmi Mat
Nawi1 and Idris Abu Seman2
1Department of Biological and Agricultural Engineering, Universiti Putra Malaysia, Malaysia.
2Ganoderma and Diseases Research for Oil Palm (GANODROP) Unit, Biological Research
Division, Malaysia Palm Oil Board, Malaysia.
Basal stem rot (BSR) is a serious disease caused by Ganoderma boninense fungus, which infects oil palm plantations leading to large economic losses in palm oil production in Malaysia. In this study, electrical impedances of oil palm leaves were measured to investigate BSR disease in oil palm tree. Leaf samples from different levels of severity (healthy, mild, moderate and severe) were collected and measured using a solid test fixture (16451B, Keysight Technologies, Japan) connected to an impedance analyzer (4294A, Agilent Technologies, Japan) with frequency range from 100 kHz to 30 MHz. The classification of the disease levels was analyzed using ANOVA and Duncan’s multiple range test (DMRT). Also, the principle component analysis (PCA) was performed to illustrate the classification of the severity levels. The results demonstrated that the impedance values were highly classified by Ganoderma disease at different levels of severity (p < 0.0001). The results showed that electrical property of leaf like impedance could be used as a sensing parameter for BSR disease detection.
Keywords: BSR disease, Impedance values, Oil palm, Severity levels.
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