Brassicaceous cover crops interfere with mobility and host finding ability of Globodera rostochiensis juveniles

Yirina Valdés Vazquez, Nicole Viaene, Maurice Moens

    Onderzoeksoutput: Bijdrage aan congresPosterpeer review


    For many decades, European farmers are facing difficulties for the management of potato cyst nematodes, Globodera rostochiensis and G. pallida. These quarantine species cause severe yield reduction in potato, as their biological characteristics allow them to survive in the soil for several years. In addition, there is a need for environmentally desirable strategies for nematode control, as chemical nematicides have been restricted in several countries. Crop rotation practices and soil amendments with plants from the Brassicaceae family received much attention due to their satisfactory biofumigant effect on soil-borne pathogens caused by a series of compounds (e.g. isothiocyanates) released at the breakdown of their tissues. This study examined the effects of root diffusates and extracts from brassicaceous plants on the movement and sensory response of G. rostochiensis second-stage juveniles (J2) towards the host. Root diffusates and extracts from roots and the above-ground parts of plant tissues were obtained from yellow mustard (Sinapis alba), rapeseed (Brassica napus) and fodder radish (Raphanus sativus). The effect on the movement of J2 was tested by direct exposure and in sand columns. The effect on the sensory perception was evaluated in water-agar and pluronic-gel plates with a tomato seedling as the attracting host. The movement of J2 was significantly reduced by direct exposure to extracts made from roots and from above-ground tissues, and so was the migration through sand columns. Juveniles pre-exposed to the diffusates or extracts of green manures could not readily detect the presence of a host in the agar or pluronic-gel plates, moving away from it during the first 8 hours of the experiment. These results indicate that breakdown of brassicaceous plant tissues can impair the mobility and sensory perception of G. rostochiensis juveniles, making these crops interesting for integrated soil management programs in potato fields.
    Oorspronkelijke taalEngels
    PublicatiestatusGepubliceerd - aug.-2016
    Evenement32nd Symposium of the European Society of Nematologists. - Braga, Portugal
    Duur: 28-aug.-20162-sep.-2016


    Congres32nd Symposium of the European Society of Nematologists.

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