Li Yong, Chen Haijiang, Ma Lan, An Youshan, Wang Hui, Wu Wenneng
Food and Pharmaceutical Engineering Institute, Guiyang University, Guiyang, China.
Front Chem. 2022 Jun 30;10:942185. doi: 10.3389/fchem.2022.942185. eCollection 2022.
Pitaya, or dragon fruit, is a typical tropical fruit with an appealing taste and diverse health benefits to humans. The plantation of pitaya in Guizhou province in China has greatly boosted the income of local farmers and alleviated poverty. However, the frequent occurrence of postharvest diseases has brought large economic loss. To find a solution, we set out to identify the postharvest disease-causing agents of Guizhou pitaya. Several fungi were isolated from diseased pitaya and identified as species based on the ITS1 sequence similarity. Of them, , , , and were, for the first time, found to cause dragon fruit disease. In consideration of their prevalence in postharvest fruit diseases, H8 and H4 were chosen as representative pathogens for the drug susceptibility test. Among the tested drugs and plant extracts, 430 g/L tebuconazole and 45% prochloraz were found to be the most potent fungicides against H8 and H4, respectively. The research provides insights into the mechanism and control of postharvest diseases of dragon fruits in Guizhou, China, and thus could be of economic and social significance to local farmers and the government.
火龙果，又称龙珠果，是一种典型的热带水果，味道诱人，对人体有多种健康益处。中国贵州省的火龙果种植极大地提高了当地农民的收入并减轻了贫困。然而，采后病害的频繁发生带来了巨大的经济损失。为找到解决办法，我们着手鉴定贵州火龙果的采后致病因子。从患病火龙果中分离出几种真菌，并根据ITS1序列相似性将其鉴定为不同物种。其中，[此处原文有缺失信息]、[此处原文有缺失信息]、[此处原文有缺失信息]和[此处原文有缺失信息]首次被发现可导致火龙果病害。鉴于它们在采后果实病害中的普遍性，选择H8和H4作为药物敏感性试验的代表性病原菌。在测试的药物和植物提取物中，发现430克/升戊唑醇和45%咪鲜胺分别是针对H8和H4最有效的杀菌剂。该研究为中国贵州火龙果采后病害的发病机制和防治提供了见解，因此对当地农民和政府具有经济和社会意义。
