{"title":"First Report of Meloidogyne javanica Infecting Rain Tree (Samanea saman) in Thailand","authors":"Natthidech Beesa, Awitsara Phochaeng, Chatchadaporn Ungkao, Pheeraphat Sangnoom, Kansiree Jindapunnapat, Anongnuch Sasnarukkit, Buncha Chinnasri","doi":"10.1111/jph.70371","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>Rain tree (<i>Samanea saman</i>) is a widely planted ornamental and shade tree in Thailand. In February 2025, root galls were observed on a mature rain tree at Kasetsart University, Bangkok, Thailand, although no visible above ground symptoms were present. The causal agent was identified as <i>Meloidogyne javanica</i> based on perineal pattern morphology, species-specific SCAR-PCR, and sequence analysis of the 18S rRNA region. Pathogenicity was confirmed by inoculating 500 second-stage juveniles (J2s) onto 45-day-old rain tree seedlings. Inoculated plants developed root galls, egg masses and eggs, whereas non-inoculated controls remained symptomless. <i>M. javanica</i> was re-isolated from inoculated plants, fulfilling Koch's postulates. This is the first report of <i>M. javanica</i> infecting rain tree in Thailand.</p>\n </div>","PeriodicalId":16843,"journal":{"name":"Journal of Phytopathology","volume":"174 4","pages":""},"PeriodicalIF":1.2000,"publicationDate":"2026-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Phytopathology","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jph.70371","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Rain tree (Samanea saman) is a widely planted ornamental and shade tree in Thailand. In February 2025, root galls were observed on a mature rain tree at Kasetsart University, Bangkok, Thailand, although no visible above ground symptoms were present. The causal agent was identified as Meloidogyne javanica based on perineal pattern morphology, species-specific SCAR-PCR, and sequence analysis of the 18S rRNA region. Pathogenicity was confirmed by inoculating 500 second-stage juveniles (J2s) onto 45-day-old rain tree seedlings. Inoculated plants developed root galls, egg masses and eggs, whereas non-inoculated controls remained symptomless. M. javanica was re-isolated from inoculated plants, fulfilling Koch's postulates. This is the first report of M. javanica infecting rain tree in Thailand.
期刊介绍：
Journal of Phytopathology publishes original and review articles on all scientific aspects of applied phytopathology in agricultural and horticultural crops. Preference is given to contributions improving our understanding of the biotic and abiotic determinants of plant diseases, including epidemics and damage potential, as a basis for innovative disease management, modelling and forecasting. This includes practical aspects and the development of methods for disease diagnosis as well as infection bioassays.
Studies at the population, organism, physiological, biochemical and molecular genetic level are welcome. The journal scope comprises the pathology and epidemiology of plant diseases caused by microbial pathogens, viruses and nematodes.
Accepted papers should advance our conceptual knowledge of plant diseases, rather than presenting descriptive or screening data unrelated to phytopathological mechanisms or functions. Results from unrepeated experimental conditions or data with no or inappropriate statistical processing will not be considered. Authors are encouraged to look at past issues to ensure adherence to the standards of the journal.
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