Soil suppressiveness towards Meloidogyne Verticillium or Pythium in greenhouse horticulture

A.W.G. van der Wurff, M.A. van Slooten, R. Hamelink, S. Bohne, W. van Wensveen

    Research output: Chapter in Book/Report/Conference proceedingConference paper

    3 Citations (Scopus)

    Abstract

    Soils originating from fourteen greenhouse horticultural companies were assessed for the level of suppressiveness of three major pathogens of vegetables and flowers, namely the root knot nematode Meloidogyne incognita, Pythium aphanidermatum and Verticillium dahlia. As controls, three well-documented soils in terms of disease suppressiveness and coarse sand were included for each pathogen. Soils were distributed over three treatments with forty replicates each in a random block design under standardized conditions. Each soil was treated with ¿-radiation in order to assess the contribution of abiotic properties to disease suppressiveness. Non-sterilized soils served as a measure of abiotic- and biotic factors, and soil without the addition of pathogens served as a control to determine background contamination of indigenous pathogens. Soils were acclimatized for one week. Afterwards, irrigation was started and pathogens were inoculated. Survival stages of V. dahlia or P. aphanidermatum were added as pure suspensions, i.e., microsclerotia or oospores, respectively. For Meloidogyne, second stadium larvae (J2) were used. Seedlings were planted for M. incognita, while for P. aphanidermatum and V. dahlia, seeds were used. A large variation in the level of suppressiveness was observed. Soil suppressiveness towards Meloidogyne, Verticillium or Pythium was not correlated. This means that suppressiveness is pathogen dependent. However, soil structure contributes to a large extent to the level of suppressiveness as exemplified by the survival rate of Meloidogyne and Pythium in sandy soils. With this dataset we aim to unravel the underlying mechanisms and investigate whether suppressiveness levels can be increased and used in an integrated soil management system.
    Original languageEnglish
    Title of host publication1 International Conference on Organic Greenhouse Horticulture
    EditorsM. Dorais, S.D. Bishop
    PublisherISHS
    Pages141-149
    Volume915
    ISBN (Print)9789066056244
    DOIs
    Publication statusPublished - 2011
    Event1 International Conference on Organic Greenhouse Horticulture, Bleiswijk, Netherlands -
    Duration: 11 Oct 201014 Oct 2010

    Conference

    Conference1 International Conference on Organic Greenhouse Horticulture, Bleiswijk, Netherlands
    Period11/10/1014/10/10

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