Abstract
Suppressiveness of soil amended with SF-21 mixture to Rhizoctonia solani and Pythium aphanidermatum was tested with a modified pine stem-segment colonization method and germ tube growth, respectively. Soil amended with 1% (w/w) SF-21 did not immediately inhibit hyphal growth and stem-segment colonization by R. solani, but 7 days after amendment it significantly inhibited the fungus. The population of other fungi increased significantly 4 days or more after application of SF-21. The density of this population was correlated with suppression of stem-segment colonization by R. solani in amended soil (...)
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