Abstract Anthracnose was observed on postharvest avocados (Persea americana) in a commercial market in Jinju, South Korea, in 2019. Symptoms included soft rot and sunken lesions leaking necrotic fluid. Orange conidial masses were observed on the outer surfaces of these unappealing avocados. Colletotrichum fungi producing grey to olive colonies with orange conidial masses were consistently recovered from the lesions on the avocados. The aim of this study was to isolate and identify the causative pathogen. Koch’s postulates were completed by conducting pathogenicity tests on avocado fruit and wounded green Arabica coffee (Coffea arabica) berries. The symptoms induced artificially on avocado fruit were the same as those of the original infections, whereas negative control avocados were asymptomatic. The fungus associated with this anthracnose produced lesions on wounded coffee berries, but not on unwounded berries. Using morphological characterization, pathogenicity testing, and partial sequencing of the internal transcribed spacer (ITS) rDNA region and the glutamine synthetase (GS) gene, the fungus was identified as Colletotrichum kahawae subsp. ciggaro B. Weir & P.R. Johnst. The results of this study are expected to provide important information for avocado transportation and quarantine.

中文翻译：

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由Colletotrichum kahawae subsp.引起的收获后鳄梨上的炭疽病。韩国的雪茄

摘要 2019 年在韩国晋州的一个商业市场上的收获后鳄梨（Persea americana）上观察到炭疽病。症状包括软腐病和渗出坏死液的凹陷病灶。在这些没有吸引力的鳄梨的外表面上观察到橙色分生孢子团块。从牛油果的病灶中始终可以回收到灰色至橄榄色菌落和橙色分生孢子团块的炭疽菌真菌。本研究的目的是分离和鉴定致病病原体。Koch 的假设是通过对鳄梨果实和受伤的绿色阿拉比卡咖啡 (Coffea arabica) 浆果进行致病性测试而完成的。在鳄梨果实上人工诱导的症状与原始感染的症状相同，而阴性对照鳄梨则无症状。与这种炭疽病相关的真菌在受伤的咖啡浆果上产生病变，但在未受伤的浆果上没有。使用形态学表征、致病性测试和内部转录间隔区 (ITS) rDNA 区域和谷氨酰胺合成酶 (GS) 基因的部分测序，该真菌被鉴定为Colletotrichum kahawae subsp。ciggaro B. Weir & PR Johnst。这项研究的结果有望为鳄梨运输和检疫提供重要信息。