<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Oil palm trunks infected by <italic>Ganoderma boninense</italic> disease have been studied using density and ultrasonic characterizations. The ultrasonic characterizations have been performed using a commercial ultrasonic instrument at the frequency of 54 kHz. The measurements have been done in 3 zones: inner zone, central zone and peripheral zone. It was found that the stem density of the oil palm infected by <italic>Ganoderma boninense</italic> disease was reduced by 50% in comparison to the original healthy trunk. From this effect the velocity of the ultrasonic wave propagated through the Longitudinal, Radial, and Tangential directions is lower for the trunk infected by <italic>Ganoderma boninense</italic> disease compared to a healthy trunk. For the 10 cm thickness of samples, the ultrasonic velocity for all transit directions was in range of 260 - 750 ms-1 for the infected sample, whereas for healthy samples was in the range of 460 - 900 ms-1. These results are very useful for the detection of the area which has been affected by the disease.</abstract>

Oil palm trunks infected by Ganoderma boninense disease have been studied using density and ultrasonic characterizations. The ultrasonic characterizations have been performed using a commercial ultrasonic instrument at the frequency of 54 kHz. The measurements have been done in 3 zones: inner zone, central zone and peripheral zone. It was found that the stem density of the oil palm infected by Ganoderma boninense disease was reduced by 50% in comparison to the original healthy trunk. From this effect the velocity of the ultrasonic wave propagated through the Longitudinal, Radial, and Tangential directions is lower for the trunk infected by Ganoderma boninense disease compared to a healthy trunk. For the 10 cm thickness of samples, the ultrasonic velocity for all transit directions was in range of 260 - 750 ms-1 for the infected sample, whereas for healthy samples was in the range of 460 - 900 ms-1. These results are very useful for the detection of the area which has been affected by the disease.

Density and Ultrasonic Characterization of Oil Palm Trunk Infected by Ganoderma Boninense Disease

Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang Selangor, Malaysia

Measurement Science Review

Oil palm trunks infected by Ganoderma boninense disease have been studied using density and ultrasonic characterizations. The ultrasonic characterizations have...

Density and Ultrasonic Characterization of Oil Palm Trunk Infected by Ganoderma Boninense Disease

Published Online: Oct 29, 2011

Page range: 160 - 164

DOI: https://doi.org/10.2478/v10048-011-0026-x

Keywords
Oil palm trunk, ultrasonic testing, elasticity constant, Ganoderma boninense

This content is open access.

Density and Ultrasonic Characterization of Oil Palm Trunk Infected by Ganoderma Boninense Disease

Published Online: Oct 29, 2011

Page range: 160 - 164

DOI: https://doi.org/10.2478/v10048-011-0026-x

KeywordsOil palm trunk, ultrasonic testing, elasticity constant, Ganoderma boninense

This content is open access.

Keywords
Oil palm trunk, ultrasonic testing, elasticity constant, Ganoderma boninense