MELOIDOGYNE PARTITYLA ON PECAN - ISOZYME PHENOTYPES AND OTHER HOSTS

Meloidogyne sp. from five pecan (Carya illinoensis) orchards in Texas were distinctive in host range and iszoyme profiles from common specie s of Meloidogyne but were morphologically congruent with Meloidogyne p artityla Kleynhans, a species previously known only in South Africa. I n addition to pecan, species of walnut (Juglans hindsii and J. regia) and hickory (C. ovata) also were hosts. No reproduction was observed o n 15 other plant species from nine families, including several common hosts of other Meloidogyne spp. Three esterase phenotypes and two mala te dehydrogenase phenotypes of M. partityla were identified by polyacr ylamide gel electrophoresis. Each of these isozyme phenotypes was dist inct from those of the more common species M. arenaria, M. hapla, M. i ncognita, and M. javanica.