Tarigan, MarthinWingfield, Michael J.Jami, FahimehMarpaung, Yosep MANDurán, AlvaroPham, Nam Q.2024-04-192024Marthin Tarigan, Michael J Wingfield, Fahimeh Jami, Yosep MAN Marpaung, Alvaro Durán & Nam Q Pham (2024) Pathogenicity of Chrysoporthe deuterocubensis on eucalypts in Indonesia, Southern Forests: a Journal of Forest Science, 86:1, 42-52, DOI: 10.2989/20702620.2023.2279054.2070-2620 (print)2070-2639 (online)10.2989/20702620.2023.2279054http://hdl.handle.net/2263/95681Several economically important pathogens, including species of Chrysoporthe, pose a threat to the rapidly expanding eucalypt plantation industry in Southeast Asia. During 2019 disease surveys in Riau and Kalimantan (Indonesia), cankers were observed on eucalypt trees and a collection of fungal isolates was obtained from them. The aim of this study was to confirm the identity of the isolates and to evaluate their relative pathogenicity on different eucalypt clones. Using the DNA sequence data based on the internal transcribed spacer (ITS) region of the ribosomal DNA and two regions of the β-tubulin gene (TUB1 and TUB2), 31 fungal isolates were identified as C. deuterocubensis. Pathogenicity trials showed that C. deuterocubensis isolates differed in their pathogenicity and that different eucalypt genotypes differed in their susceptibility to the pathogen. These results will provide valuable information to reduce the threat of stem canker to future eucalypt plantation development.en© 2023 NISC (Pty) Ltd. This is an electronic version of an article published in Southern Forests, vol. 86, no.1 , pp. 42-52, 2023. doi : 10.2989/20702620.2023.2279054. Southern Forests is available online at : http://www.tandfonline.comloi/tsfs20.CryphonectriaceaeFungal pathogensPlanted forestStem cankersSusceptibilitySDG-15: Life on landIndonesiaChrysoporthe deuterocubensisPathogenicityEucalyptsInternal transcribed spacer (ITS)Postprint Article