Leaf spot of Desmodium triflorum caused by Epicoccum sorghinum in South China

Author:

Lu Ying12ORCID,Zhang Hui‐ru12,Zhang Wei‐yi3,Wu Wei‐huai12,He Chun‐ping12,Liang Yan‐qiong12,Huang Xing12,Yi Ke‐xian124

Affiliation:

1. Key Laboratory of Integrated Pest Management on Tropical Crop, Environment and Plant Protection Institute, Ministry of Agriculture and Rural Affairs Chinese Academy of Tropical Agricultural Sciences Haikou China

2. Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests Haikou China

3. School of Tropical Agricultural and Forestry Hainan University Danzhou China

4. Sanya Research Institute Chinese Academy of Tropical Agricultural Sciences Sanya China

Abstract

AbstractDesmodium triflorum is an important gramineous forage grown in tropical regions of China. In August 2022, a new leaf spot disease was observed on D. triflorum during a field survey at the base of the Chinese Academy of Tropical Agricultural Sciences, Hainan, China. The pathogen was isolated and identified using morphological examination and phylogeny based on multi‐gene sequences analysis of the nuclear ribosomal internal transcribed spacer, the second largest RNA polymerase subunit (RPB2), and beta‐tubulin genes. The isolates were identified as Epicoccum sorghinum. The pathogenicity of E. sorghinum on D. triflorum was validated fulfilling Koch's postulates, causing leaf spot disease. To the best of our knowledge, this is the first report of leaf spot disease on D. triflorum caused by E. sorghinum in China.

Publisher

Wiley

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