摘要 : The root-knot nematode <i>Meloidogyne chitwoodi</i> is a quarantine nematode in the Netherlands which threatens seed potato production. Since 2001 a new product for soil disinfestation was developed on the basis of dimethyl disulp... 展开 The root-knot nematode <i>Meloidogyne chitwoodi</i> is a quarantine nematode in the Netherlands which threatens seed potato production. Since 2001 a new product for soil disinfestation was developed on the basis of dimethyl disulphide (DMDS). DMDS is a substance naturally present in some plants especially in <i>Allium</i>. Preliminary results are encouraging from the point of efficacy against root-knot nematodes, root-lesion nematodes and cyst nematodes. In this situation DMDS could be an alternative to other soil disinfestation methods for <i>Meloidogyne chitwoodi</i> control. The efficacy of the fumigant DMDS as a soil treatment against root-knot nematode <i>Meloidogyne chitwoodi</i> was tested in 2 field trials with potatoes in 2007 and 2008 with the collaboration of Wageningen University PPO-AGV. After DMDS applications with dosages of 600 L/ha or more potato quality was nearly perfect with an index next to zero. Fumigation of soil with DMDS against the root-knot nematode <i>Meloidogyne chitwoodi</i> resulted in a higher potato yield, a better potato quality and low nematodes counts after growing potato. 收起