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頁籤選單縮合
題名 | 夜來香新病害--葉斑病=The Occurrence of Leaf Spot Disease of Tuberose |
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作者 | 曾素玲; 童伯開; | 書刊名 | 植物保護學會會刊 |
卷期 | 40:2 1998.06[民87.06] |
頁次 | 頁145-152 |
分類號 | 435.459 |
關鍵詞 | 夜來香; 葉斑病; Tuberose; Leaf spot disease; Fusarium equiseti; |
語文 | 中文(Chinese) |
中文摘要 | 在雲林虎尾、嘉義港坪、水上及屏東等夜來香栽培區進行病害調查時,發現在重瓣夜來香品種之葉片上佈滿褐色斑點,經分離、接種、鑑定病原菌為Fusarium equiseti(Corda)Sacc.。本病為夜來香首次記錄的病害,本病之病徵初為水浸狀小點,漸轉為褐色橢圓形至圓形斑點,中間微凹陷,邊緣出現明顯水浸狀,末期水浸狀邊緣消失,發病嚴重時除葉片外,亦可感染花穗及花梗,造成花腐病。病原菌在馬鈴薯葡萄糖瓊脂上生長快速,25 ℃,5天即可長至8.8公分,大孢子鐮刀狀,著生在單瓶梗上,有足狀基細胞,3∼5個隔膜,大小為22.5∼45 × 2.5∼5 μ m,小孢子卵形,著生在氣生菌絲上,厚膜孢子鏈生或叢生。菌絲最適生長溫度為20∼30 ℃,孢子發芽適溫在20∼35 ℃,以30 ℃最佳。發病最適溫度為25∼35 ℃兩天即可出現病徵,15∼20 ℃則需7天才出現病徵。本病除為害重瓣夜來香外,亦可感染單瓣夜來香。寄主範圍測定中尚可感染水稻及龍舌蘭科之虎尾蘭及朱蕉。 |
英文摘要 | The present study was the first record to describe a leaf spot disease found on tuberose. The causing agent was isolated and identified as Fusarium equiseti. The symptoms of this disease primarily showed water soaking spots, then turned elliptical or round browning spots. The pathogen could infect leaves, stems, and cause rotting flowers. The pathogen grew rapidly on PDA plates. The colonies were reached 8.8 cm in diameter for 5 days at 25 ℃. Sickle-shaped macroconidia from monophialides, with a foot-shaped basal cell, were 3-5 septate and 22.5-45 X 2.5-5 μ m.Microconidia were oval, and produced from aerial mycelium. Chlamydospores were formed in chains or clumps. The optimum temperature for mycelial growth was ranged from 20-30 ℃.The temperature ranges for conidia germination was between 20 and 35 ℃, and the optimum temperature was 30 ℃. The optimum temperature for disease development was ranged from 25 to 35 ℃, and the symptoms were observed in 2 days. However, the symptoms were not shown at 15-20 ℃ 7 days after inoculation. The disease was found both on double and single petal of tuberose varieies. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。