“Cladosporium rot” on “Bosc” pear fruit during cold storage causes significant economic losses and has been reported in recent years in the productive valleys of Río Negro and Neuquén. The species involved were not determined. During 2016-2017, “Bosc” pears (Pyrus communis) in cold storage chambers exhibited external brownish black circular spots caused by Cladosporium spp. The objective of this work was to determine the Cladosporium species that caused the above mentioned symptoms. The morphological and molecular analyses of the partial sequence of the actin gene (ACT) supported the identification. Cladosporium macrocarpum, Cladosporium subtilissimum and Cladosporium floccosum were determined as the species involved in the disease. Although Cladosporium has been reported to cause pear rot, this is the first report to identify these species as causal agents of this fruit disease.

冷藏期间“Bosc”梨果实上的“枝孢菌腐烂”会造成重大的经济损失，近年来在 Río Negro 和 Neuquén 的生产性山谷中已有报道。所涉及的物种尚未确定。2016-2017 年期间，冷藏室中的“Bosc”梨（Pyrus community）表现出由枝孢菌引起的外部棕黑色圆形斑点。这项工作的目的是确定引起上述症状的枝孢菌属物种。肌动蛋白基因 (ACT) 部分序列的形态学和分子分析支持该鉴定。大果芽枝霉，霉subtilissimum和Cladosporium floccosum被确定为与该疾病有关的物种。尽管据报道枝孢菌会导致梨腐烂，但这是首次将这些物种确定为这种水果病害的病原体的报告。