First report of Neopestalotiopsis terricola causing leaf spot disease on Rhododendron fortunei in China

IF 2.5 2区农林科学 Q1 AGRONOMY

Crop Protection Pub Date : 2025-07-16 DOI:10.1016/j.cropro.2025.107340

Xiaoli Li , Yingling Huang , Qijiang Wei , Jianjun Lin , Lijuan Peng , Haixia Ding

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引用次数: 0

Abstract

Rhododendron fortunei is a rare species unique to China, known for its vibrant flower colors and beautiful shapes, possessing extremely high ornamental value. In May 2023, leaf spot disease symptoms were seen on R. fortunei in a 1.2 acre planting area in the Baili Azalea Forest Area in Guizhou province, China. Approximately 10–20% of the leaves in the planting area were observed to be affected by this disease. The symptoms were characterized by numerous black conidiomata on grayish-white lesions. Leaf spot was a common disease that has a major impact on the growth and ornamental value of Rhododendron. In this study, leaves gathered with characteristic symptoms were subjected to the single-spore isolation technique in order to identify the pathogen. According to morphological and phylogenetic analysis (ITS, tub2, tef1-α), N. terricola has been recognized as the pathogen associated with leaf spot disease in R. fortunei. Pathogenicity tests revealed that the pathogen could infect healthy R. fortunei, causing the previously described symptoms, and being re-isolated from inoculation plants. To our knowledge, N. terricola was found for the first time on R. fortunei. This study provided valuable insights into identifying the pathogens of plant leaf spot diseases.

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引起杜鹃花叶斑病的陆地新拟多毛孢在国内首次报道

杜鹃花是中国特有的珍稀物种，以其鲜艳的花朵和美丽的形状而闻名，具有极高的观赏价值。2023年5月，在贵州省百里杜鹃花林区1.2亩种植面积上发现了叶斑病症状。据观察，种植区域约有10-20%的叶片受此病影响。症状表现为灰白色病灶上有大量黑色分生瘤。叶斑病是影响杜鹃花生长和观赏价值的一种常见病害。本研究采用单孢子分离技术对采集到的具有特征性症状的叶片进行病原菌鉴定。根据形态和系统发育分析（ITS, tub2, tef1-α），土旋乳杆菌被认为是与叶斑病相关的病原菌。致病性试验表明，该病原菌可感染健康的福尔图尼，引起上述症状，并可从接种植株中重新分离。据我们所知，赤藓属是首次在福尔图尼岛上发现的。本研究为植物叶斑病病原菌的鉴定提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Crop Protection 农林科学-农艺学

CiteScore

6.10

自引率

3.60%

发文量

200

审稿时长

29 days

期刊介绍： The Editors of Crop Protection especially welcome papers describing an interdisciplinary approach showing how different control strategies can be integrated into practical pest management programs, covering high and low input agricultural systems worldwide. Crop Protection particularly emphasizes the practical aspects of control in the field and for protected crops, and includes work which may lead in the near future to more effective control. The journal does not duplicate the many existing excellent biological science journals, which deal mainly with the more fundamental aspects of plant pathology, applied zoology and weed science. Crop Protection covers all practical aspects of pest, disease and weed control, including the following topics: -Abiotic damage- Agronomic control methods- Assessment of pest and disease damage- Molecular methods for the detection and assessment of pests and diseases- Biological control- Biorational pesticides- Control of animal pests of world crops- Control of diseases of crop plants caused by microorganisms- Control of weeds and integrated management- Economic considerations- Effects of plant growth regulators- Environmental benefits of reduced pesticide use- Environmental effects of pesticides- Epidemiology of pests and diseases in relation to control- GM Crops, and genetic engineering applications- Importance and control of postharvest crop losses- Integrated control- Interrelationships and compatibility among different control strategies- Invasive species as they relate to implications for crop protection- Pesticide application methods- Pest management- Phytobiomes for pest and disease control- Resistance management- Sampling and monitoring schemes for diseases, nematodes, pests and weeds.