Summary
The antagonistic microflora in the rhizosphere of plants of three varieties of potato, viz. Ps 194' ‘Up to date’, and a local variety of different ages were analysed. Antagonists were selected either by random isolation or by Wilska's spraying technique. The antagonists were always found in higher frequency in rhizosphere compared with the control soil. The highest percentage of actinomycetes antagonists were found in the variety Up to date; of fungal antagonists in the variety Ps 194; while the local variety was found to be the poorest in this regard. Further, the antagonistic activity of these organisms was estimated by a cross-streak method and the resistant antagonists were also selected by cross-antagonism. The most resistant antagonists found were Trichoderma viride T 56 and T 7, Chaetomium trilaterate F 75, Streptomyces alboflavus Rs 40, Streptomyces sp. Cs 73, Pseudomonas sp. Rs 1 50 and Pseudomonas sp III Ps 63.
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Mall, S. Studies on microbial antagonism in rhizosphere soils of potato varieties differentially susceptible to black-scurf and wilt. Plant Soil 39, 547–554 (1973). https://doi.org/10.1007/BF00264172
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DOI: https://doi.org/10.1007/BF00264172