Using visible spectral-index as alternative methods for identifying levels of Ganoderma Boninese infection

Abstract

Ganoderma boninense is a major devastating disease for oil palm. The severity level identification of Ganoderma boninense on oil palm plantation is important to support the decision making on managerial activities. There have been researches conducted about the usage of unmanned aerial photograph (UAV) on oil palm plantation, nonetheless, the utilization of digital data on the visible aerial photograph has not optimally used. This study aims to obtain alternative methods to identify the severity level of Ganoderma boninense infection with visible spectral index from a visible aerial photograph (RGB). Visible aerial photograph (RGB-aerial photograph) is adopted on this research and carried out at Dusun Ulu plantation with various visible spectral-index methods. The visible spectral-index methods are the excess green index (ExG), the excess red index (ExR), the excess green minus excess red index, and the colour of vegetation extraction (CIVE). The results of four visible spectral-index methods are able to differentiate the severity level of Ganoderma boninense infection on each individual of oil palm.

An In-Depth Study of Phytopathogenic Ganoderma: Pathogenicity, Advanced Detection Techniques, Control Strategies, and Sustainable Management

“…ExG, ExR, and CIVE indices effectively assess infection levels in individual trees. This method provides an alternative approach for evaluating G. boninense infection using visible spectral indices from aerial photographs [ 249 ]. A spectroscopic analysis enables the accurate and early detection of Ganoderma disease in oil palm, with a high classification accuracy of 97%.…”

Pengembangan Biomarka Untuk Seleksi Tanaman Tahan Penyakit Busuk Pangkal Batang Pada Kelapa Sawit

“…Busuk pangkal batang atau sering disebut penyakit Ganoderma (GD) pada kelapa sawit disebabkan cendawan G. boninense (Yit Kheng Goh et al, 2020). Penyebaran penyakit ini sangat cepat pada daerah endemik di Sumatera Utara atau perkebunan kelapa sawit yang telah ditanami beberapa generasi (Purba et al, 2011;Wiratmoko et al, 2018). Penyebaran penyakit ini terjadi melalui tular tanah dimana terjadi kontak antar akar kelapa sawit, basidiospor, dan sumber inokulum di dalam tanah (Alexander et al, 2017).…”