|Title:||台灣香蕉黃葉病之抑病土||Other Titles:||Suppressive soil of banana fusarium wilt in Taiwan||Authors:||莊再揚
|Keywords:||香蕉黃葉病;黃葉病菌;抑病土;Fusarium wilt of banana;Fusarium oxysporum f. sp. cubense;suppressive soil||Issue Date:||Jun-1991||Publisher:||農業試驗所||Start page/Pages:||133-141||Conference:||土壤病原生態與防治研討會專刊||Abstract:||
There was a positive correlation between chlamydospore germination on soil surface and infection rate of banana plantlets among 10 soils tested. Among 69 soil samples collected from central and southern Taiwan tested, only few soils were pathogensuppressive. The chiamydospore germination and new chlamydospore formation were inhibited significantly in suppressive soil. Mycelial lysis was also enhanced in suppressive soil. The pathogen survived longer in conducive soil than in suppressive soil. Analysis of soil samples revealed that chiamydospore germination on soil was inversely correlated with pH and Ca content, but it was not correlated with Mg, K, P, organic matter content of soil texture. A negative correlationship between chiamydospore germination and population of actinomycetes but not bacteria and fungi, in soil, was found. Steaming completely nullified the inhibitory effect of suppressive soils, but the suppressiveness was somewhat restored when the soils were exposed to the air for 7 days. Addition of rose bengal or streptomycin to suppressive soils greatly decreased their inhibitory effects. Addition of glucose-asparagine solution at the concentration of 300 and 3000 ppm to the suppressive soils also decreased the suppressiveness at the beginning, but the suppressiveness was greatly enhanced 7 days after nutrient amendment. The suppresiveness of conducive soil was increased after adding antagonistic bacteria and actinomycetes, but not fungi, into soil. The addition of CaCO3 or CaCO3 mixed with glucose-asparagine solution followed by microorganisms or 1% suppressive soil into conducive soil resulted in increasing suppressiveness. The efficacy of induction of suppressiveness in steamed soil was better than in none steamed soil.
|Appears in Collections:||植物病理組|
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