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  • Antagonism  (2)
  • Springer  (2)
  • BioMed Central
  • Oxford University Press
  • Wiley-Blackwell
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  • Springer  (2)
  • BioMed Central
  • Oxford University Press
  • Wiley-Blackwell
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 69 (1982), S. 171-175 
    ISSN: 1573-5036
    Keywords: Alternaria solani ; Antagonism ; Biological control ; Brown spot ; Disease control ; Early blight ; Helminthosporium oryzae ; Streptomyces longisporus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Streptomyces longisporus, isolated from field soil in association with wheat stubble, showed antagonism againstHelminthosporium oryzae andAlternaria solani in vitro as well as in soil (autoclaved). The organism or its filtrate showed formation of a distinct zone of inhibition in culture against the pathogens. Infected potato seed pieces or rice grains dipped in the culture filtrate prevented or reduced disease incidence to different degrees depending on the period of treatment. Infestation of soil (autoclaved) withS. longisporus and the pathogens in various combinations also reduced disease incidence. Among such combinations, infestation withS. longisporus followed by the pathogens proved to be the most efficient.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-5036
    Keywords: Antagonism ; Cauliflower ; Cellulose C∶N ratio ; Damping-off ; Rhizoctonia solani ; Rice stubbles ; Waterhyacinth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Cauliflower damping-off caused byRhizoctonia solani was found to be appreciably reduced when population of the pathogen and other microflora in soil was manipulated by using powders of commercial cellulose, rice stubbles or waterhyacinth biomass in combination with NH4NO3 as soil amendments. Cellulose powder was most effective in reducing the disease incidence. Some of the amendments also promoted seedling growth. Total microbial population as well as those showing antagonism to the pathogen in culture increased relatively more in amended soil than in nonamended control. In general, when C∶N ratio in soil increased, fungal population decreased but actinomycetes and bacterial population increased.
    Type of Medium: Electronic Resource
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