Non-Invasive Assessment of the Internal Condition of Urban Trees Infested by Two Cerambycid Beetles, Aromia bungii and Massicus raddei, Using Sonic Tomography

Author:

Lee Byeong-jong1,Son Seulki1ORCID,Jung Jong-kook12ORCID,Park Yonghwan3

Affiliation:

1. Department of Forest Environment Protection, Kangwon National University, Chuncheon 24341, Republic of Korea

2. Institute of Forest Science, Kangwon National University, Chuncheon 24341, Republic of Korea

3. Department of Forest Disaster & Environment, National Institute of Forest Science, Seoul 02455, Republic of Korea

Abstract

The introduction of wood-boring insects to non-native areas can pose a significant threat to global forest ecosystems. Aromia bungii and Massicus raddei, native to Asia including Korea but potentially important in urban forestry worldwide, are severe trunk borers that have recently infested host trees in urban landscapes of Korea. The signs of external injury can help identify cerambycid-infested trees. However, assessing the internal condition of trees without causing damage is challenging, which hinders the management of infested trees that are still alive. This study evaluated the potential use of sonic tomography to assess injury characteristics in the woody parts of trees, such as Prunus × yedoensis and Quercus palustris infested by A. bungii and M. raddei, respectively. Among the 45 investigated trees, the number of holes on external parts was recorded by visual examination. Sonic tomography images revealed decayed areas, allowing for a comparison of internal damage between infested and non-infested trees. The internal status of trees infested by the two cerambycid beetles differed from that of healthy trees. While some healthy trees exhibited minimal internal damage, those that were not infested by beetles showed decayed areas, potentially caused by non-biological factors such as frozen cracks. In conclusion, sonic tomography equipment can potentially be used for non-invasive assessment of internal injuries caused by wood-boring insects in urban trees.

Funder

National Research Foundation of Korea

Kangwon National University

Publisher

MDPI AG

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