Identification, pathogenicity, and fungicide sensitivity of Eutiarosporella dactylidis associated with leaf blight on maize in China

文献类型： 外文期刊

第一作者： Guo, Cheng

作者： Guo, Cheng;Li, Jiping;Xu, Shengjun;Wang, Chunming;Guo, Zhijie;Zhou, Tianwang;Hong, Liu;Zhang, Xiaojie;Wang, Baobao;Yang, Zhihuan;Wang, Xiaoming;Duan, Canxing

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关键词： maize leaf blight; morphology; molecular phylogeny; Eutiarosporella dactylidis; fungicide sensitivity

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.8； 五年影响因子：4.8 ）

ISSN： 2095-3119

年卷期： 2024 年 23 卷 3 期

页码：

收录情况： SCI

摘要： Maize ( Zea mays L.) is an economically vital grain crop that is cultivated worldwide. In 2011, a maize foliar disease was detected in Lingtai and Lintao counties in Gansu Province, China. The characteristic signs and symptoms of this disease include irregular chlorotic lesions on the tips and edges of infected leaves and black punctate fruiting bodies in dead leaf tissues. Given favourable environmental conditions, this disease spread to areas surrounding Gansu. In this study, infected leaves were collected from Gansu and Ningxia Hui Autonomous Region between 2018 and 2020 to identify the disease-causing pathogen. Based on morphological features, pathogenicity tests, and multilocus phylogenetic analysis involving internal transcribed spacer (ITS), 18S small subunit rDNA (SSU), 28S large subunit rDNA (LSU), translation elongation factor 1-alpha ( TEF ), and beta-tubulin ( TUB ) sequences, Eutiarosporella dactylidis was identified as the causative pathogen of this newly discovered leaf blight. Furthermore, an in vitro bioassay was conducted on representative strains using six fungicides, and both fludioxonil and carbendazim were found to significantly inhibit the mycelial growth of E. dactylidis . The results of this study provide a reference for the detection and management of Eutiarosporella leaf blight.

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