|Title:||應用微生物捕食性線蟲 Aphelenchus avenae 防治亞麻、黃麻腰折病之研究||Other Titles:||Studies on the Control of Rhizoctonia Damping-Off of Flay and Jute by Mycophagous Nematode, Aphelenchus Avenae||Authors:||程永雄
|Issue Date:||7-Mar-1974||Publisher:||農業試驗所||Journal Volume:||23||Journal Issue:||1||Start page/Pages:||75-82||Source:||農業研究||Abstract:||
應用捕食性線蟲Apholenchus avenae防治亞麻、黃麻腰折病，室內盆栽試驗結果，發現在每栽盆（113cm2）Rhizoctonia solani病土內接種A. avenae l,710-8,550隻，能有效防治亞麻、黃麻腰折病之發生，接種之線蟲數過多或過少，均無良好防治效果。
A. avenae在R. solani之菌絲上餵食，一個細胞的內容物在15秒鐘內即可被吸空。線蟲在餵食前其頭唇部左右擺動探索，直至與菌絲細胞接觸，而口針與細胞壁成垂直狀。
在適當溫度30℃下，A. avenae之繁殖速度最快，而過於低溫10℃或高溫40℃均不良於生長。土壤濕度亦是影響線蟲繁殖之一重要因子，一般在高土壤濕度40%MHC環境下，線蟲生存數目會逐漸減少，而在土壤濕度20%MHC下，最適宜於A. avenae之繁殖生長。
The results showed that, in general, for all the fungus-nematode combinations studied, an inital population of A. avenae at approximately 1710-8550 nematodes gave the best control of flax damping-off in 133cm2 of R. solani sick soil. Both higher and lower populations gave poorer control of the disease Similar resuslts were obtained from Rhizoctonia darning-off of Jute.
A. avenae removed cell contents of hyphal cell of R. solani in a feeding cycle of about 15 sec. duration. The nematodes probed with its lips before feeding, turning its head from side to side until its lips touched a host cell. The nematode oriented its stylet against the cell wall at a right angle to the cell surface.
The rate of population increae of A. avenae was great at moderate temperature (30°C), and was least at both very low (10℃) or very high temperature (40°C). Soil moisture was also an important environmental factor affecting population growth. In general, the number of nematodes surviving in soil decreased with the increase of soil moisture. The optimum growth soil moisture was 20%MHC.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.