Cyst Nematodes (Heteroderidae) From Argentina

An undescribed species of the genus Cactodera Krall & Krall, 1978, was found in uncultivated soil and potato fields in the southeastern region of the Buenos Aires province. The morphology of this Cactodera species is described from cysts and second stages juveniles. It is characterized by a subglobose to ovoid small cyst averaging 413 μm in length, an insignificant, circumfenestrate vulval cone and lacks vulval denticles and bullae. Cactodera amaranthi and Globodera tabacum tabacum from Argentina are described and discussed. The transfer of Heterodera acnidae to the genus Cactodera is confirmed.