Addition to Erysiphe quercicola, A Powdery Mildew Fungus on Urena lobata in South China
Shiqing Ma, Biao Xu, Indunil C. Senanayake and Jiage Song* Author for corresponding; e-mail address: jiagesong@sina.com
Volume: Vol.50 No.3 (May 2023)
Research Article
DOI: https://doi.org/10.12982/CMJS.2023.030
Received: 28 Febuary 2023, Revised: 13 March 2023, Accepted: 27 March 2023, Published: -
Citation: Ma S., Xu B., Senanayake I.C. and Song J., Addition to Erysiphe quercicola, A Powdery Mildew Fungus on Urena lobata in South China, Chiang Mai Journal of Science, 2023; 50(3): e2023030. DOI 10.12982/CMJS.2023.030.
Abstract
Leaves of Caesar weed (Urena lobata) with typical powdery mildew symptoms were collected from Baiyun Mountain Park in Guangzhou, China during winter and summer in 2020 and 2021. Based on the morphology and molecular sequence analyses of Internal Transcribed Spacer (ITS) and large subunit (LSU) rDNA region, the causative agent was identified as Erysiphe quercicola. A description and relevant microscopic images of the pathogen are provided. According to our knowledge, this is the first report of E. quercicola on Urena lobata and this study expands the host range of E. quercicola. Further, we provided details of life cycle and geographical distribution of the fungus.