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Identification, Pathogenicity, and Fungicide Sensitivity of Colletotrichum Species Associated with Anthracnose on Italian Ryegrass in Southwestern China.
Xu, Lingling; Xu, Zhiting; Liu, Jiaqi; Cui, Huawei; Long, Jiahui; Xue, Longhai; Li, Chunjie.
Afiliação
  • Xu L; Lanzhou University, State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Center for Grassland Microbiome; Engineering Research Center of Grassland Industry, Ministry of Education; Gansu Tech Innovation Center of Western China Grassland Industry; College of Pastoral Agriculture
  • Xu Z; Chinese Academy of Forestry, Grassland Research Center of National Forestry and Grassland Administration, Haidian District, Beijing, China; xulingling95@163.com.
  • Liu J; Lanzhou University, State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Center for Grassland Microbiome; Engineering Research Center of Grassland Industry, Ministry of Education; Gansu Tech Innovation Center of Western China Grassland Industry; College of Pastoral Agriculture
  • Cui H; Lanzhou University, State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Center for Grassland Microbiome; Engineering Research Center of Grassland Industry, Ministry of Education; Gansu Tech Innovation Center of Western China Grassland Industry; College of Pastoral Agriculture
  • Long J; Chinese Academy of Forestry, Grassland Research Center of National Forestry and Grassland Administration, Beijing, China; liujq20@lzu.edu.cn.
  • Xue L; Lanzhou University, State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Center for Grassland Microbiome; Engineering Research Center of Grassland Industry, Ministry of Education; Gansu Tech Innovation Center of Western China Grassland Industry; College of Pastoral Agriculture
  • Li C; Lanzhou University, State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Center for Grassland Microbiome; Engineering Research Center of Grassland Industry, Ministry of Education; Gansu Tech Innovation Center of Western China Grassland Industry; College of Pastoral Agriculture
Plant Dis ; 2024 Jul 25.
Article em En | MEDLINE | ID: mdl-39051995
ABSTRACT
Italian ryegrass (Lolium multiflorum L.) is widely cultivated as an important forage worldwide because of its high nutritional value and good palatability. Anthracnose caused by Colletotrichum species was a common and new emerging disease of Italian ryegrass. In this study, 88 Colletotrichum isolates were collected from diseased leaves of Italian ryegrass planting regions in Sichuan, Chongqing and Guizhou provinces of southwestern China between 2019 and 2022. By pure culture technique, 15 representative single-spore isolates were obtained for further study. Multi-locus phylogenetic analysis coupled with morphological features showed that these isolates were finally identified as six new record species C. cereale of the C. graminicola species complex, C. fioriniae and C. nymphaeae of the C. acutatum species complex, C. boninense and C. citricola of the C. boninense species complex, and C. nageiae. Pathogenicity tests indicated that all species could induce anthracnose symptoms; of these, C. cereale was more invasive than other species, followed by C. fioriniae, C. nageiae, C. citricola and C. boninense; C. nymphaeae was weakest pathogenic to Italian ryegrass plants (P ≤ 0.05). Fungicide sensitivity assays showed that iprodione, propineb and oxime·tebuconazole had strong inhibitory effect on the mycelial growth of six Colletotrichum species; in addition, azoxystrobin and fludioxonil also significantly inhibited the mycelial growth of C. nymphaeae and C. fioriniae, respectively. These results provide the basis for the diagnosis and detection in the field, pathogen identification and management of anthracnose on Italian ryegrass.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Plant Dis Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Plant Dis Ano de publicação: 2024 Tipo de documento: Article