Root-knot nematodes (Meloidogyne spp.) can parasitize and reduce yields of nearly all agricultural crops. Although migration studies focus on the model species, M. incognita, there is little information about M. enterolobii, which has been a major threat for guava in Brazil. The vertical migration of second-stage juveniles (J2) of M. enterolobii and M. incognita was evaluated to determine the effect of good host and nonhost plants on nematode motility. Fourteen-cm long soil columns were constructed of PCV rings with Styrofoam cups containing a 4-week-old tomato or marigold (Tagetes patula) seedlings as plant stimuli; host-free cups were used as nontreated control. After inoculating 1000 freshly-hatched J2, the columns were placed in environmental chamber sets at 20 °C. The columns were disassembled at 3, 6, and 9 days after inoculation (DAI). The experiment was completely randomized block with four replicates. J2 were extracted from each ring and cup, while tomato and marigold roots were stained to observe J2 that penetrated roots. Data were subjected to repeated-measure MANOVA and chi-square test to compare J2 distribution along the columns. The migrations under tomato and marigold stimuli were comparable to those under host-free columns. Although both species migrated over 13 cm, M. enterolobii was more mobile than M. incognita. Juveniles of M. enterolobii infected tomato roots as early as 3 DAI, whereas marigold delayed nematode penetration. Our results show that two species of root-knot nematodes behave differently within the soil, and under the same conditions J2 of M. enterolobii migrate faster than M. incognita.

根结线虫（Meloidogyne spp。）可以寄生并降低几乎所有农作物的产量。尽管迁移研究集中在模式物种隐孢子虫（M. incognita）上，但关于肠球菌（M. enterolobii）的信息很少，这对巴西番石榴是一个主要威胁。的第二阶段幼虫（J2）的垂直迁移M. enterolobii和南方根结线虫被评估，以确定良好的主机和线虫上运动非寄主植物的效果。用PCV环和聚苯乙烯泡沫塑料杯构造14厘米长的土壤柱，其中装有一个4周龄的番茄或万寿菊（Tagetes patula）幼苗作为植物的刺激；使用无宿主杯作为未处理的对照。接种1000份刚孵化的J2后，将色谱柱放置在20°C的环境室中。接种后第3、6和9天（DAI）拆卸色谱柱。实验是完全随机的，重复四次的区块。从每个环和杯中提取J2，同时对番茄和万寿菊的根进行染色以观察J2渗透到根中。对数据进行重复测量的MANOVA和卡方检验，以比较J2沿列的分布。番茄和万寿菊刺激下的迁移与无宿主柱下的迁移相当。虽然这两个物种迁移超过13厘米，M. enterolobii比多个移动南方根结线虫。少年肠杆菌感染番茄的根部最早在3 DAI时发生，而万寿菊则延迟了线虫的穿透。我们的研究结果表明，两种根结线虫的表现不同土壤中，并且在相同的条件J2 M. enterolobii迁移的速度比南方根结线虫。