Neofusicoccum parvum Causing Leaf Spot of Camellia drupifera in China  

作　　者：Fengyu YU Xiaoyu LIU Xiaocheng JIA Dengqiang FU Xiaoqing NIU Weiwei SONG 

机构地区：[1]Coconut Research Institute,Chinese Academy of Tropical Agricultural Sciences/Hainan Key Laboratory of Tropical Oil Crops Biology,Wenchang 571339,China

出　　处：《Plant Diseases and Pests》2022年第2期5-7,13,共4页植物病虫害研究（英文版）

基　　金：Hainan Provincial Natural Science Foundation of China(319MS081);Central Finance Forestry Science and Technology Extension Project(Qiong[2020]TG06).

摘　　要：[Objectives]The study was to identify the causal agent of leaf spots of Camellia drupifera in Hainan Province,China.[Methods]Phylogenetic analyses,spore morphology and pathogenicity tests were adopted to identify the pathogen.[Results]The fungus was identified as Neofusicoccum parvum.The colonies were initially pale to white on PDA,with diffuse yellow pigment around the colonies in the agar after 5 d.After 10 d,the aerial mycelium became gray,and the substrate mycelium became black.Thirty days later,a large number of conidia were generated on OMA.Conidia were hyaline,nonseptate,and fusiform.The mean size of 100 conidia was(13.6-25.4)×(6.2-10.3)μm;the mean length/width ratio was(2.5±0.3)μm.[Conclusions]N.parvum was the causal agent of leaf spots of C.drupifera observed in Hainan Province,China.

关 键 词：Neofusicoccum parvum Leaf spot disease Camellia drupifera Phylogenetic analysis 

分 类 号：S763.7[农业科学—森林保护学]