查詢結果分析
來源資料
相關文獻
- 蔬菜種子誘釣法檢測無土介質之病原菌
- 無土育苗介質檢出之Rhizoctonia solani的病原性與族群動態
- 立枯絲核菌對賓克隆殺菌劑抗性及敏感性菌株之質體狀DNA的差異分析
- 土壤因子與拮抗菌對百合根腐病菌(Rhizoctonia solani)存活的影響
- 利用拮抗菌--蛭石夾層法防治立枯絲核菌引起之幼苗猝倒病
- 立枯絲核菌引起山木麻黃和大花紫薇苗猝倒病
- Influence of Bean Seedling Root Exudates on the Rhizosphere Colonization by Trichoderma Lignorum for the Control of Rhizoctonia Solani
- 立枯絲核菌對賓克隆殺菌劑的感受性與其影響因子
- 黃后日衛矛苗枯病之綜合防治
- The Occurrence of Rhizoctonia Seedling Blight of Lily in Taiwan
頁籤選單縮合
題 名 | 蔬菜種子誘釣法檢測無土介質之病原菌=Detection of Major Pathogenic Fungi in Soilless Nursing Medium for Vegetable Seeds |
---|---|
作 者 | 葉俊巖; 黃義雄; 李敏郎; 謝式坢鈺; 許淑瑩; 張梅玲; 張光寧; | 書刊名 | 桃園區農業改良場研究報告 |
卷 期 | 28 1997.03[民86.03] |
頁 次 | 頁30-38 |
分類號 | 435.2 |
關鍵詞 | 無土介質; 立枯絲核菌; 誘釣; 多重土塊取樣法; 連續稀釋法; Soilless medium; Rhizoctonia; Baiting; Multiple pellets soil sampling; |
語 文 | 中文(Chinese) |
中文摘要 | 在25℃以蔬菜種子誘釣,可從尚未使用之無土育苗介質中檢出Ascochyta、Rhizoctonia、Pythium、Fusarium與Alternaria等病原菌,而Ascochyta與Alternaria原本就污染在種皮上。Rhizoctonia、Pythium、與Fusarium才是無土育苗介質中危害作物苗期生長的主要病原菌。檢出之AG4對蔬菜苗具強烈病原性,AG7雖不具病原住,但仍能在甘藍之種皮上纏據(colonization);AG8則可在苗齡七天以下之甘藍苗造成局部病斑。不同來源之Rhizoctonia AG4間之融合率仍有差異,檢出之一株Fusarium鑑定為F. solani。介質在稀釋10倍時,細菌檢出率比真菌高,係因細菌的族群較高,且抑制真菌的生長,而稀釋20倍時,真菌在初期檢出率較高,乃因真菌之殘存構造體積較大,發芽生長增殖之速度較快,依不同時間檢出之菌相推論,如播種前將介質長時間處於高含水狀態,會使細菌增加,而與病原真菌拮抗,但不適合播種機實際操作,雖然Tichoderma檢出之比率甚高,但其在介質中卻未發揮應有之抑病效果,係由於受蔬菜種子上粉衣之Thiram或Metalaxyl,以及農民施用的藥劑抑制所致,而Monacrosporium為捕食線蟲的真菌。 |
英文摘要 | Ascochyta, Rhizoctonia, Pythium, Fusarium and Alternaria were major pathogenic fungi groups baited with cabbage, chinese cabbage, cucumber and cantaloupe seeds, from four soilless vegetable nursing media. Ascochyta and Alternaria are seedborne fungal pathogen, which might colonize on seed coat originally. However Rhizoctonia, Pythium and Fusarium was the current pathogens causing seedling damping-off of vegetables. AG 4 and AG 7 were major anastomosis groups of Rhizoctonia which were baited more frequently from soilless vegetable nursing medium, whereas AG 7and AG 8 were baited with low frequency. AG 4 was highly pathogenic to vegetable seedlings, causing typical damping-off of various vegetable seedlings. Although AG 7 was non-pathogenic to vegetable seedlings, it could colonize on the seed coats, and AG 8 caused local lesions on seedlings with ages less than seven days. Among various isolates of Rhizoctonia AG 4, there were significant difference of anastomosis frequency for one against each other, since the existency of sub-anastomosis groups. An isolate of Fusarium was identified as F. solani but its pathogenicity was not examined. Under series dilution plates, of soilless vegetable nursing media, ten-fold dilution plates, bacteria were more frequently than fungi to form colonies on water agar, perhaps due to their higher ,population density, and their inhibitory action against fungi. On the contrary, under twenty-fold dilution plates, fungal colonies appeared with higher frequency, which were deduced as their lager survival structure, which enabled them to germinate faster to form colonies. As proposed by time course of colony forming, conduct a long term and high moisture condition for soilless vegetable nursing media, might result in highly propagation of bacteria, and to inhibit fungal pathogens, but such conditions were not match to automatic machinery seeding system. Another fungal group baited from soilless vegetable nursing media was Trichoderma, but it didn't supress damping-off of vegetable seedlings caused by Rhizoctonia or Pythium, perhaps due to Trichoderma was inhibited by fungicides coated on seeds such as Thiram or Metalaxyl, or other fungicides applied by farmers during seedlings developing. A nematodes trapping fungi, Monacrosporium, was also baited from soilless vegetable nursing media frequently, but were not examined. |
本系統中英文摘要資訊取自各篇刊載內容。