Summary
In glasshouse experiments,Microdochium bolleyi (Mb) significantly reduced infection of wheat roots by the take-all fungus,Gaeumannomyces graminis vartritici (Ggt), when inocula were dispersed in soil at ratios of 10∶1 (Mb:Ggt) or more. Spread of take-all lesions up roots from a layer of inoculum also was reduced when Mb was inoculated immediately below the crown. In contrast,Periconia macrospinosa did not control take-all even at an inoculum ratio of 100∶1.
M. bolleyi interfered with growth on roots byPhialophora graminicola, a known biocontrol agent of take-all. It is suggested that this phenomenon and control of take-all by these fungi occur by competition for cortical cells that senesce in the normal course of root development.
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Kirk, J.J., Deacon, J.W. Control of the take-all fungus byMicrodochium bolleyi, and interactions involvingM. bolleyi, Phialophora graminicola andPericonia macrospinosa on cereal roots. Plant Soil 98, 231–237 (1987). https://doi.org/10.1007/BF02374826
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DOI: https://doi.org/10.1007/BF02374826