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題 名 | 甘藷基腐病菌Phomopsis destruens生理特性及防治技術研究=The Study of Physiological Characteristics and Control of Phomopsis destruens Causing Foot Rot of Sweet Potato |
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作 者 | 黃巧雯; 楊宏仁; 林靜宜; 許淑麗; 賴素玉; 倪蕙芳; | 書刊名 | 臺灣農業研究 |
卷 期 | 65:1 2016.03[民105.03] |
頁 次 | 頁45-53 |
分類號 | 434.31 |
關鍵詞 | 甘藷; 甘藷基腐病; 病害防治; Sweet potato; Ipomoea batatas; Foot rot disease; Phomopsis destruens; Disease control; |
語 文 | 中文(Chinese) |
中文摘要 | 黃巧雯、楊宏仁、林靜宜、許淑麗、賴素玉、倪蕙芳。2016。甘藷基腐病菌Phomopsisdestruens生理特性及防治技術研究。台灣農業研究65(1):45–53。甘藷基腐病(foot rot)由Phomopsis destruens所引起,為近年來限制甘藷生產之重要病害。本研究於甘藷田區進行甘藷基腐病發生調查,得知此病源菌不僅危害鮮藷用之「台農57號」及「台農66號」,亦危害葉菜用甘藷「台農71號」,顯示台灣主要栽培的甘藷品種皆不具抗病性。本病原菌絲生長之最適溫度為20℃,於25–30℃時為分生孢子發芽適溫,而15–30℃範圍本病害均會發生。於健康種苗、罹病種苗及病土對甘藷基腐病發生之影響試驗中,發現罹病種苗種植於健康土中具有100%發病率,顯示罹病種苗為本病害重要感染源之一,因此清潔種苗來源為防治本病害之重要策略。另外,本研究進行淹水處理對病害發生之影響評估,結果發現病藷淹水1 wk後即失去作為感染源之能力,而罹病藤蔓於淹水2 wk以上亦可喪失作為田間感染源之能力。因此,建議發病田區應儘量與水稻輪作,若未能種植水稻仍應執行淹水2 wk以上,以消滅病藷及罹病殘體上之菌體,避免成為下一期作之感染源。 |
英文摘要 | Huang, C. W., H. R. Yang, C. Y. Lin, S. L. Hsu, S. Y. Lai, and H. F. Ni. 2016. The study of physiological characteristics and control of Phomopsis destruens causing foot rot of sweet potato. J. Taiwan Agric. Res. 65(1):45-53. Foot rot disease is a major limiting factor for sweet potato production in recent years. In this study, foot rot of sweet potato was investigated in different growing regions of Taiwan. Results showed that the disease was harmful to commercial root-used varieties of sweet potato, ‘TN57’ and ‘TN66’, as well as vegetable-used variety, ‘TN71’, suggesting that the major cultivars of sweet potato in Taiwan were not resistant to the disease. The optimal temperature of mycelial growth and spore germination of Phomopsis destruens were 20℃ and 25–30℃, respectively. The maximum incidence of foot rot disease occurred in range of 15–30℃. The incidence of foot rot was 100% when the diseased seedlings were grown in uninoculated soil for 12 wk, suggesting that the disease seedling was a major inoculum source. Therefore, good quality of seedlings would be an important factor to control the foot rot of sweet potato in the field. However, when the field grown with diseased tuber and stem were treated with flooding for 1 wk and 2 wk, respectively, the disease incidence of foot rot was reduced to zero. As a result, the field with the foot root disease should be rotated with paddy rice annually or flooded for more than 2 wk after the previous harvest to eradicate the pathogen avoiding the infection in the next season. |
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