Postharvest fruit rot was observed on muskmelon (Cucumis melo) on market shelves at a melon farm in the city of Hatyai, Songkhla, Thailand. Diseased muskmelon fruit displayed cotton‐like mycelia on wounds and had brown to dark brown internal tissue. Based on morphological characteristics and molecular analysis of internal transcribed spacer (ITS) and translation elongation factor 1‐α (TEF1‐α) DNA sequences, the fungal pathogen was identified as Fusarium incarnatum. This species belongs to the Fusarium incarnatum‐equiseti species complex (FIESC). A pathogenicity test was conducted to verify Koch's postulates, and F. incarnatum was observed to cause fruit rot on muskmelon; symptoms of the disease were similar to those seen in the field. However, only artificially wounded melons became infected, suggesting that F. incarnatum is an obligate wound‐infecting pathogen. To our knowledge, this is the first report of F. incarnatum causing fruit rot of muskmelon in Thailand.

中文翻译：

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Fusarium incarnatum 与甜瓜（Cucumis melo）的采后果实腐烂有关

在泰国宋卡府合艾市的一个甜瓜农场的市场货架上，在市场货架上的甜瓜（Cucumis melo）上观察到收获后果实腐烂。患病的甜瓜果实在伤口上显示出棉花状的菌丝体，并具有棕色至深棕色的内部组织。基于内部转录间隔区 (ITS) 和翻译延伸因子 1-α (TEF1-α) DNA 序列的形态特征和分子分析，真菌病原体被鉴定为 Fusarium incarnatum。该物种属于 Fusarium incarnatum-equiseti 物种复合体 (FIESC)。进行了致病性试验验证了Koch的假设，观察到F. incarnatum导致甜瓜果实腐烂；这种疾病的症状与实地观察到的症状相似。然而，只有人工受伤的甜瓜被感染，表明 F. incarnatum 是一种专性伤口感染病原体。据我们所知，这是泰国首次报道 F. incarnatum 导致甜瓜果实腐烂。