Leaf spot disease on Viburnum odoratissimum caused by Corynespora cassiicola and Colletotrichum species in China

IF 2.5 2区农林科学 Q1 AGRONOMY

Crop Protection Pub Date : 2026-01-01 Epub Date: 2025-10-21 DOI:10.1016/j.cropro.2025.107450

Feng Lin , Xiaojie Peng , Kai Cai , Haonan Wang , Lifeng Zhou , Xudong Zhou

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Abstract

Viburnum odoratissimum Ker-Gawler is widely cultivated for ornamental purpose and phytochemical potential. Severe leaf spot disease of the plant was observed in Hangzhou, Zhejiang, China. The objective of the study was to determine the disease causal agents and to test their chemical susceptibility. The leaves with typical leaf spot symptoms were sampled, and a total number of 71 fungal isolates obtained. The isolates were assigned to two morphological groups, and multi-loci of selective isolates of each group were sequenced. Phylogenetic analysis disclosed that they reside in the genera of Colletotrichum (C. gloeosporioides, C. fructicola, and C. karstii) and Corynespora (Corynespora cassiicola). The study represents the new host records of C. fructicola and C. karstii. The pathogenicity test showed that Corynespora cassiicola was most pathogenic to V. odoratissimum plants than three Colletotrichum species. The susceptibility to fungicides test disclosed that both Corynespora cassiicola and C. fructicola are sensitive to QoIs fungicides such as pyraclostrobin, trifloxystrobin, and picoxystrobin, and pyraclostrobin demonstrated the most inhibitory activity. We thus propose to apply QoIs fungicides for V. odoratissimum leaf disease management. The study provides the knowledge on the pathogenic fungal species causing leaf spot disease on V. odoratissimum in China and the information on disease chemical control.

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由桃蚜和炭疽菌引起的多味豆荚叶斑病

由于观赏用途和植物化学潜力，在我国被广泛种植。在中国浙江杭州发现了严重的叶斑病。本研究的目的是确定致病因子并测试其化学敏感性。对具有典型叶斑病症状的叶片进行取样，共分离得到71株真菌。将分离株分为两个形态类群，并对每一类群的选择性分离株进行多位点测序。系统发育分析表明，它们属于炭疽菌属（C. gloeosporioides， C. fructicola和C. karstii）和炭疽菌属（Corynespora cassiicola）。本研究代表了果孢霉（C. fructicola）和卡氏霉（C. karstii）的新寄主记录。致病性试验结果表明，桃核孢子菌对臭草的致病性强于3种炭疽菌。对杀菌剂的敏感性试验表明，桃核孢子菌和果核孢子菌对pyraclostrobin、trifloxystrobin和picoxystrobin等qis杀菌剂均敏感，其中pyraclostrobin的抑制活性最强。因此，我们建议将qoi杀菌剂应用于臭草叶病管理。该研究为了解中国多臭叶斑病的病原真菌种类和病害化学防治提供了依据。

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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.