Wang Xin, He Cai, Zhang Peng, Zhao Lianxin, Liu Wei, Jin Na, Guo Yanlan
Wuwei Academy of Forestry, Wuwei 733000, China.
Wuwei Forestry and Grassland Industry Development Service Center, Wuwei 733000, China.
Pathogens. 2025 Apr 29;14(5):432. doi: 10.3390/pathogens14050432.
Pear ( spp.) is a globally important fruit crop, with China leading in the production and cultivation area. Pear dry blight, a destructive fungal disease, has emerged as a significant threat to pear orchards in Wuwei, Gansu Province, China. This study aimed to identify the causal pathogen, evaluate its pathogenicity, and assess the efficacy of commonly used fungicides. A total of 276 fungal isolates were obtained from symptomatic stems and characterised through morphological and molecular analyses. was identified as the causal pathogen. Pathogenicity assays on Zaosu pear branches and Huangguan pear fruits resulted in 82% and 100% disease incidence, respectively, fulfilling Koch's postulates. In vitro fungicide evaluations demonstrated that thiophanate-methyl and difenoconazole + propiconazole exhibited the strongest inhibitory effects, followed by mancozeb, metalaxyl-mancozeb, and carbendazim, whereas chloroisobromine cyanuric acid and dimethomorph were the least effective. These findings are critical for developing effective management strategies to mitigate the impact of pear dry blight on pear production.
梨（蔷薇科梨属）是一种在全球具有重要地位的水果作物，中国在其产量和种植面积方面位居世界首位。梨干枯病是一种具有破坏性的真菌病害，已成为中国甘肃省武威市梨园的重大威胁。本研究旨在鉴定致病病原菌，评估其致病性，并评价常用杀菌剂的防治效果。从有症状的茎部共分离得到276株真菌菌株，并通过形态学和分子分析对其进行了鉴定。确定为致病病原菌。对早酥梨枝条和皇冠梨果实进行的致病性测定结果显示，发病率分别为82%和100%，符合柯赫氏法则。体外杀菌剂评价表明，甲基硫菌灵和苯醚甲环唑+丙环唑表现出最强的抑制作用，其次是代森锰锌、甲霜灵锰锌和多菌灵，而氯异溴尿酸和烯酰吗啉效果最差。这些研究结果对于制定有效的管理策略以减轻梨干枯病对梨生产的影响至关重要。
