頁籤選單縮合
題名 | 甘藷基腐病之病原及其對六種不同甘藷品種之感受性分析=Analyses for the Causal Agent of Sweet Potato Foot Rot Disease and Its Susceptibility on Six Sweet Potato Cultivars |
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作者姓名(中文) | 沈原民; 劉興隆; 趙佳鴻; | 書刊名 | 植物保護學會會刊 |
卷期 | 55:2 2013.06[民102.06] |
頁次 | 頁25-33 |
分類號 | 434.31 |
關鍵詞 | 甘藷基腐病; 品種; 甘藷; Sweet potato; Plant disease identification; Phomopsis; |
語文 | 中文(Chinese) |
英文摘要 | In 2009, sweet potatoes with foot rot symptom were collected in Changhua and Taichung.Fungi isolated from the symptomatic tissues were diagnosed Phomopsis destruens (Harter)Boerema, the causal agent of sweet potato foot rot disease, based on the morphology and hostrange. The internal transcribed spacer (ITS) nucleotide sequences of the fungal isolates werehighly identical to that of the foot rot disease pathogen SPPD-1 isolate. All plants propagatedfrom the diseased cutting showed symptoms, but the healthy plants could be obtained usingsterilized substrate to cultivate the disease-free parts of the infected sweet potatoes. Inoculationof P. destruens on different cultivars of sweet potatoes, showing that all six tested cultivars"Tainung No.57", "Tainung No.66", "Tainung No.71", "Tainung No.72", "Tainung No.73"and "Taoyuan No.2" were infected. However, the area under disease progress curve (AUDPC)values of the six cultivars were not significantly different. Linear regression analysis usingthe severity data of foot rot disease showed the relationship of the disease severities over time(weeks) was y = -7.55 + 1.906x. |
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