In Belgium and worldwide, agriculture has been under threat from plant-parasitic nematodes. Root-lesion nematodes (Pratylenchus spp.) cause yield loss in many vegetable, arable and horticultural crops. Increased use of cover crops can affect population build ups. This study evaluated the reproductive potential of Pratylenchus penetrans on different cultivars of cover crops both, in pot tests and field experiments. Twenty-three different cultivars were evaluated against P. penetrans at low (10 P. penetrans per 100 cm³ soil) and high (100 P. penetrans per 100 cm³ soil) initial inoculum density in a pot experiment under glasshouse conditions. Based on their reproductive factor (Rf) after 8 weeks, they were classified under five different categories: Non-host, Poor host, Maintenance host, Good host, and Excellent host. At low Pi, fodder radish 'Defender' and 'Doublet' and birds foot trefoil 'Lotar' were poor hosts. At high Pi, birds foot trefoil 'Lotar' and 'Franco', fodder radish 'Doublemax', 'Maximus' and 'Contra', black oat 'Pratex', phacelia 'Natra', Italian ryegrass 'Meroa' and 'Fedra', rye 'Dukato' and 'Matador' reduced the P. penetrans population. Under field conditions, fodder radish 'Doublet', Japanese oat 'Delux', yellow mustard 'Chacha', Phacelia 'Natra', Italian ryegrass 'Fedra' and Tagetes patula reduced the root-lesion nematode population. The infectious process of P. penetrans on some of these cultivars, proven to be poor hosts, was screened using Cone tainers™. Penetration, development and multiplication of P. penetrans was assessed. The information opens possibilities for further resistance breeding. Based on our results we can conclude that with proper choice of selected cultivars of cover crops, P. penetrans can be controlled but that further breeding efforts are needed.

在比利时和世界各地，农业一直受到植物寄生线虫的威胁。根部病变线虫（短体线虫属）会导致许多蔬菜、耕地和园艺作物减产。增加覆盖作物的使用会影响人口增长。本研究通过盆栽试验和田间试验评估了穿透短体线虫在不同覆盖作物品种上的繁殖潜力。在温室条件下的盆栽实验中，以低（每 100 cm ^{3土壤 10 个}P. penetrans）和高（每 100 cm ^{3土壤 100 个}P. penetrans ）初始接种密度对 23 个不同品种的P. penetrans进行了评估。根据8周后的繁殖因子（Rf），将它们分为五个不同的类别：非宿主、差宿主、维持宿主、良好宿主和优秀宿主。在低Pi时，饲料萝卜“Defender”和“Doublet”以及鸟足三叶草“Lotar”是较差的寄主。在高Pi下，鸟足三叶草“Lotar”和“Franco”，饲料萝卜“Doublemax”、“Maximus”和“Contra”，黑燕麦“Pratex”、phacelia“Natra”，意大利黑麦草“Meroa”和“Fedra”，黑麦“Dukato”和“Matador”减少了P. penetrans 的数量。在田间条件下，饲料萝卜“Doublet”、日本燕麦“Delux”、黄芥菜“Chacha”、Phacelia“Natra”、意大利黑麦草“Fedra”和万寿菊减少了根部病斑线虫数量。使用 Cone tainers™ 筛选了其中一些被证明是不良宿主的品种上的穿透假单胞菌的感染过程。评估了P. penetrans的渗透、发育和繁殖。该信息为进一步抗性育种提供了可能性。根据我们的结果，我们可以得出结论，通过正确选择覆盖作物的品种，可以控制穿透P. penetrans，但需要进一步的育种工作。