Meloidogyne incognita
( Kofoid and White, 1919) Chitwood, 1949
Syn.:
 Oxyuris incognita Kofoid & White, 1919
Heterodera incognita (Kofoid & White, 1919) Sandground, 1923
M. incognita incognita (Kofoid & White, 1919) Chitwood, 1949
M. incognita acrita Chitwood, 1949
M. incognita inornata Lordello, 1956
M. acrita (Chitwood, 1949) Esser et al., 1976
M. elegans da Ponte, 1977
M. grahami Golden & Slana, 1978
M. incognita wartellei Golden and Birchfield, 1978
M. incognita grahami (Golden & Slana, 1978) Jepson, 1987
Introduction
M. incognita is the most widespread and commonly encountered species in tropical and subtropical regions. It is seldom found where average monthly temperatures approach freezing. Four host races have been traditionally recognized, based on reproductive ability on selected host species. M. incognita can reproduce on a wide range of hosts.
Classification
Considered one of the "major" Meloidogyne species, M. incognita reproduces by mitotic parthenogenesis and is genetically very similar to M. javanica and M. arenaria . A triploid lineage of 40-46 chromosomes is the most common cytological form.
Morphological identification
Perineal patterns of females typically have a high, squarish dorsal arch. The male head has a characteristic large, rounded labial disc, which appears concave in lateral view. The second-stage juvenile averages 405 um in length.

DNA Sequences Obtained
Specimen: Collected:
TX B862 C Texas
TX B754 B Texas