（Institute of Plant Protection，Hainan Provincial Academy of Agricultural Sciences，Key Laboratory of Plant Disease and Pest
Control of Hainan Province，Scientific Observation and Experiment Station of Crop Pests in Haikou，Ministry of Agricultur and
Rural Affairs，Haikou 571100，Hainan）
Abstract：In order to identify the pathogenic bacteria species of new wax gourd disease discovered in
Hainan wax gourd planting base，this study observed and analyzed the samples collected from Chengmai County
after separation and pure culture. The results indicated that this disease is wax gourd brown spot. According to
observation on morphological characteristics of pathogenic bacteria and pathogenicity identification，it was
Corynespora cassiicola（Berk & Curt）Wei. Results showed that the similarity of sequence alignment and
homology of Corynespora cassiicola was 100%. They and Corynespora cassiicola from different areas belonged
to the same branch. It was confirmed that the disease pathogen was Corynespora cassiicola（Berk & Curt）
Wei.
