Weeds are host and multipliers of root-knot nematodes (Meloidogyne spp.). The status quo of the knowledge of the ability of Meloidogyne arenaria to reproduce in weeds is a little unknown. The present study aimed to evaluate the ability of M. arenaria to parasitize and reproduce in different weeds found in Brazil. Thirty-eight weed species were individually inoculated with 5000 eggs and second stage juveniles. Inoculated plants were kept in a greenhouse for 60 days. The design was completely randomized with twelve repetitions. The root system of each plant was evaluated for gall index, number of nematodes per root gram and reproduction factor. M. arenaria showed the ability to parasitize the 38 weed species. It was observed that 76.3% of the evaluated species were susceptible (RF ≥ 1.0) to M. arenaria. Oxalis corniculata resulted in the highest nematode RF (34.9). The present study identified for the first time the reproduction potential of M. arenaria on different weeds, showing their polyphagous habit, and indicating species of plants with greater ability to multiply this nematode that need more attention during the integrated management of this root-knot nematodes.

杂草是根结线虫（Meloidogyne spp。）的寄主和繁殖体。关于Meloidogyne arenaria在杂草中繁殖的能力的知识的现状还不得而知。本研究旨在评估沙门氏菌在巴西发现的不同杂草中寄生和繁殖的能力。38个杂草物种分别接种了5000个卵和第二阶段的幼虫。接种的植物在温室中放置60天。该设计完全随机进行了十二次重复。评价每种植物的根系的胆指数，每根克的线虫数和繁殖因子。沙蚕显示出能够寄生38种杂草的能力。观察到有76.3％的被评估物种对沙眼分支杆菌敏感（RF≥1.0）。Oxalis corniculata导致最高的线虫RF（34.9）。本研究首次确定了沙雷氏菌在不同杂草上的繁殖潜力，显示了它们的多食性习性，并表明了具有更大能力繁殖这种线虫的植物物种，在这种根结线虫的综合管理过程中需要更多的注意。 。