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  • 1
    Digitale Medien
    Digitale Medien
    Studies on some fungi isolated from the rhizosphere of tomato plants and the consequent prospect for the control of Verticillium wilt (1981)
    Springer
    Plant and soil 63 (1981), S. 209-216 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Antagonism ; Biological control ; Disease severity ; Rhizosphere microflora ; TomatoVerticillium albo-atrum
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Biological control of Verticillium wilt disease with antagonistic micro-organisms was studied. Antagonism of some fungi, isolated from tomato rhizosphere, toVerticillium albo-atrum R & B. was observedin vitro. A clearly defined zone, in which the growth of the pathogen was inhibited, was observed withPenicillium spp. (includingPenicillium chrysogenum Thom) andFusarium culmorum (S.G. Sm) Sacc., whileTrichoderma viride pers. ex Fries,Gliocladium spp. andPenicillium vermiculatum Dangeard, suppressed the growth ofV. albo-atrum by penetrating, and overgrowing it. OnlyT. viride andP. vermiculatum culture filtrate added to the Dox's agar, reduced the radial growth ofV. alboatrum. Root-dip application of culture filtrates ofT. viride andP. chrysogenum was found to be most effective in controlling the disease, followed by other species ofPenicillium andGliocladium spp. WhileFusarium culmorum provided no control. Improvement of plant height and vigour with a better yield due to culture filtrate treatment occurred. Root-dip application of antagonistic fungal propagules (T. viride, P. chrysogenum) to tomato seedlings was also very effective in controlling wilt in tomato plants grown inV. albo-atrum infested soil.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02374599
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  • 2
    Digitale Medien
    Digitale Medien
    Effect of the chemical and physical condition of the soil on Verticillium wilt of antirrhinum (1981)
    Springer
    Plant and soil 63 (1981), S. 217-225 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Antagonism ; Antirrhinum ; Disease severity ; Rhizosphere microflora ; Soil moisture ; Soil pH ; Verticillium
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary In vitro study showed thatVerticillium dahliae Kleb. grew well in a wide range of acid and alkaline media (viz. pH 3.5 to 10.5). The best growth of the fungus was observed in pH 5.5. Soil pH 3.5 was toxic for growing antirrhinum seedlings. Development of Verticillium wilt of antirrhinum was affected by soil pH. The severity of the disease was greater in alkaline soil conditions compared with acid conditions. Soil of pH 3.5 gave very good control of the symptom expression by the infected plants. Rhizosphere analysis results showed that fungal population with the exception ofPenicillium spp., was drastically reduced in the rhizosphere of the plants grown in acid soil. Although the overall population of fungi was reduced in theV. dahliae infected antirrhinum rhizosphere in acid soil, the population ofPenicillium spp. markedly increased. The antagonistic activity of thePenicillium spp. in the rhizosphere might also have reduced the disease severity. Since the seedlings did not grow properly in very dry and very wet soil, rhizosphere analysis of these soils was not possible. Disease severity was much less in wet soil compared with plants grown in medium moisture level and dry soil, but the plant growth was very poor.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02374600
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  • 3
    Digitale Medien
    Digitale Medien
    Effects of organic amendments to soil on the rhizosphere microflora of antirrhinum infected withVerticillium dahliae Kleb. (1979)
    Springer
    Plant and soil 53 (1979), S. 99-103 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Antirrhinum ; Disease severity ; Cellulose ; Chitin ; Green manure ; Microflora ; Amended soil ; Verticillium
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Organic (e.g. chitin, green manure, cellulose) amendments to soil induced quantitative and qualitative changes in the rhizosphere microflora of antirrhinum plants infected withVerticillium dahliae Kleb. Whereas reduction in disease severity occurred with chitin and green manure amendments, an increase in disease severity was observed with the application of cellulose. The reduction of the disease severity with chitin and green manure may be correlated with the increased population of actinomycetes in the antirrhinum rhizosphere.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02181883
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