Genus Naccobus

False Root-Knot Nematode

Most important species: N. aberrans

• generally not economical important
• main crop damage on potatoes in South America
• wide host range including, crucifers, chenopods, cucurbits, solanaceous and leguminous plants
• forms galls on roots giving it the name "false root-knot"
• reproduction by parthenogenesis

Life Cycle

1. J2 penetrates, but does not form galls
2. nematodes feed on cortical tissue causing necrosis and molt to J3 & J4
3. immature females may migrate to new roots and induce syncytium formation and galling
4. females may lay eggs in a gelatinous matrix outside the root surface