Md. Shariar Hossain Sazzad, Syeda Munjiba Islam, Sadikul Islam Nayon, Sabrina Saniat Ayon, Romel Ahmed, Mohammed Masum Ul Haque
{"title":"First report of Colletotrichum siamense causing leaf blight on teak (Tectona grandis) in Bangladesh","authors":"Md. Shariar Hossain Sazzad, Syeda Munjiba Islam, Sadikul Islam Nayon, Sabrina Saniat Ayon, Romel Ahmed, Mohammed Masum Ul Haque","doi":"10.1007/s13313-026-01120-2","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>Teak (<i>Tectona grandis</i> Linn. f.) is one of the most valuable and ecologically important tree species due to its high-quality timber and numerous industrial uses worldwide. During surveys conducted in February 2025, a new leaf blight disease of teak was observed in several plantations in Sylhet and the Chittagong Hill Tracts of Bangladesh. Isolates were constantly recovered from the necrotic areas of the leaves. Morphological and cultural features along with multi-gene phylogenetic analyses confirmed the identification of the pathogen as <i>Colletotrichum siamense</i>. Pathogenicity of the pathogen was confirmed on detached healthy leaves through artificial inoculations, fulfilling Koch’s postulates. To our knowledge, this is the first report of <i>C. siamense</i> causing leaf blight on <i>T. grandis</i> in Bangladesh.</p>\n </div>","PeriodicalId":8598,"journal":{"name":"Australasian Plant Pathology","volume":"55 2","pages":""},"PeriodicalIF":1.2000,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Australasian Plant Pathology","FirstCategoryId":"97","ListUrlMain":"https://link.springer.com/article/10.1007/s13313-026-01120-2","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Teak (Tectona grandis Linn. f.) is one of the most valuable and ecologically important tree species due to its high-quality timber and numerous industrial uses worldwide. During surveys conducted in February 2025, a new leaf blight disease of teak was observed in several plantations in Sylhet and the Chittagong Hill Tracts of Bangladesh. Isolates were constantly recovered from the necrotic areas of the leaves. Morphological and cultural features along with multi-gene phylogenetic analyses confirmed the identification of the pathogen as Colletotrichum siamense. Pathogenicity of the pathogen was confirmed on detached healthy leaves through artificial inoculations, fulfilling Koch’s postulates. To our knowledge, this is the first report of C. siamense causing leaf blight on T. grandis in Bangladesh.
期刊介绍：
Australasian Plant Pathology presents new and significant research in all facets of the field of plant pathology. Dedicated to a worldwide readership, the journal focuses on research in the Australasian region, including Australia, New Zealand and Papua New Guinea, as well as the Indian, Pacific regions.
Australasian Plant Pathology is the official journal of the Australasian Plant Pathology Society.
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