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題 名 | Application of Epidermal Coating Antitranspirants for Controlling Cucumber Downy Mildew in Greenhouse=在溫室利用抗蒸散劑防治胡瓜露菌病 |
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作 者 | Haggag,Wafaa M.; | 書刊名 | 植物病理學會刊 |
卷 期 | 11:2 2002.06[民91.06] |
頁 次 | 頁69-78 |
分類號 | 435.263 |
關鍵詞 | 抗蒸散劑; 胡瓜; 露菌病; Film forming antitranspirants; Cucumber; Downy mildew; Pseudoperonospora cubensis; |
語 文 | 英文(English) |
中文摘要 | 由Pseudoperonospora cubensis 引起的胡瓜露菌病,可經由葉部噴佈Kaolin、Nu-Film、Bio-Film、Folicote及Polyacrylamide Anti-Stress 550 等抗蒸散劑,降低病害發生率。盆栽試驗證明不管在病原菌接種前或接種後,噴佈抗蒸散劑均可有效的減輕病害發生百分率外,尚可降低病原菌的產孢作用。在這些參試的化合物中,施行1% Kaolin與Nu-Film兩者是較有效的處理組,它們可以減少露菌的產孢量、孢子發芽率及減輕受害的面積。電子顯微鏡檢查發現Kaolin抗蒸散劑具有抑制孢子發芽及促使孢囊崩解與喪失膨壓的功效,在自然的感染條件下,播種胡瓜後第 45及75天,噴佈兩次抗蒸散劑,可顯著減少病害的罹病度外,尚可增進胡瓜株高及提高產量。綜合研究成果證明在設施中施用抗蒸散劑,尤其是 Kaolin,可以有效防治胡瓜露菌病。 |
英文摘要 | Downy mildew in cucumber plants, caused by Pseudoperonospora cubensis, was reduced by foliar spraying of antitranspirants film Kaolin, Nu-Film, Bio-Film, Folicote and Polyacrylamide Anti-Stress 550. In pots experiments, antitranpirants were proved to be effective in reducing disease incidence, severity and pathogen sporulation whatever prior or post inoculated. Among these compounds, Kaolin and Nu-Film (1.0%) were more effective in reducing spores counts germination, infected area and lesions number of downy mildew. Scanning electron microscopic examination showed that Kaolin antitranspirant inhibited spores germination and made the sporangia becoming collapsed and lost its turgidity when applied either pre or post inoculation. Under protected cultivation and natural infection conditions, all antitranspirants showed a remarkable effectiveness on the reduction of disease severity when applied twice, 45 and 75 days after sowing in cucumber leaves. Furthermore, all tested antitranspirants, significantly increased the cucumber plant height and yield. Kaolin strongly protected cucumber against downy mildew and increased yield. Conclusively, antitranspirants film can be used as effective treatments for the control of downy mildew disease in cucumber plants under plastic houses. |
本系統中英文摘要資訊取自各篇刊載內容。