O presente trabalho trata de nematóides associados a raízes de 71 plantas invasoras, as quais revelaram a presença de 8 gêneros e 18 espécies parasitos. As espécies, pela ordem crescente de frequência, foram: Helicotylenchus dihystera (46%); Meloidogyne javanica (24%); Meloidogyne incognita (23%); Macroposthonia ornata (17%); Pratylenchus brachyurus (16%); Pratylenchus zeae (14%); Xiphinema setariae (11%); Xiphinema krugi (10%); Helicotylenchus pseudorobustus (5,6%); Meloidogyne arenaria (4,2%); Helicotylenchus dihysteroides (4,2%); Tylenchorhynchus martini (4,2%); Aphelenchoides sp. (2,8%); Ditylenchus sp. (2,8%); Helicotylenchus microcephalus (2,8%); Xiphinema elongatum (2,8%); Helycotylenchus egyptiensis (1,4%); e Meloidogyne coffeicola (1,4%). São feitas considerações sobre as implicações para a agricultura de tão ampla distribuição de nematóides nas plantas colonizadoras e nas gramíneas utilizadas como forrageiras.

Plant parasitic nematodes associated with roots of 71 weed plants species collected from selected cultivated areas of Brazil. Eight genera and 18 species of plant parasitic nematodes were reported. The species were recovered in the following descending order of frequency: Helicotylenchus dihystera (46%); Meloidogyne javanica (24%); Meloidogyne incognita (23%); Macroposthonia ornata (17%); Pratylenchus brachyurus (16%); Pratylenchus zeae (14%); Xiphinema setariae (11%); Xiphinema krugi (10%); Helicotylenchus pseudorobustus (5.6%); Meloidogyne arenaria (4.2%); Helicotylenchus dihysteroides (4.2%); Tylenchorhynchus martini (4.2%); Aphelenchoides sp. (2.8%); Ditylenchus sp. (2.8%); Helicotylenchus microcephalus (2.8%); Xiphinema elongatum (2.8%); Helycotylenchus egyptiensis (1.4%); and Meloidogyne coffeicola (1.4%). Considerations were given to the agricultural production implications of the wide distribution of nematodes associated with weed plants and pasture grasses.