In September 2022, symptoms of leaf anthracnose were observed on desert rose (Adenium obesum) plants distributed in parks and gardens in Culiacán, Sinaloa, Mexico. Two morphotypes of Colletotrichum isolates were obtained from symptomatic tissues. Based on morphological characterization in combination with multilocus phylogenetic analyses including data from internal transcribed spacer, actin, glyceraldehyde‐3‐phosphate dehydrogenase, and β‐tubulin, and pathogenicity tests, it was confirmed that C. siamense and C. truncatum are the causal agents of the disease. This is the first report of C. siamense and C. truncatum causing leaf anthracnose in desert rose worldwide.

中文翻译：

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暹罗炭疽病和元宝炭疽病在沙漠玫瑰（Adenium obesum）上引起叶炭疽病的全球首次记录

2022年9月，沙漠玫瑰出现叶炭疽病症状（腺花）植物分布在墨西哥锡那罗亚州库利亚坎的公园和花园中。的两种形态类型炭疽菌属从有症状的组织中获得分离株。基于形态学表征结合多位点系统发育分析（包括内转录间隔区、肌动蛋白、甘油醛-3-磷酸脱氢酶和β-微管蛋白的数据）以及致病性测试，证实C。暹罗和C。元宝是疾病的致病因素。这是第一份报告C。暹罗和C。元宝在世界范围内引起沙漠玫瑰叶炭疽病。