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Pythium volatile exposure assays and Hyacinth bioassays. (A) Differences in Pythium hyphal density upon volatile exposure sterilized soil (control) and untreated and disinfested soil in 2011. (B) Detailed pictures taken from agar plates after volatile exposure. (C) Results of Hyacinth bioassays in soil from differently managed fields without (−) and with (+) Pythium intermedium addition. U, untreated; P, peat addition; AD, anaerobic disinfestation.
