Intraspecific variability of the facultative meiotic parthenogenetic root-knot nematode (Meloidogyne graminicola) from rice fields in Vietnam.

Twenty years ago, the facultative meiotic parthenogenetic root-knot nematode (RKN), Meloidogyne graminicola, was recognised as an important rice pathogen in South Vietnam. Although this country is one of the most important rice exporters worldwide, a comprehensive picture of the occurrence of M. graminicola in Vietnamese rice fields is still not available.