Meloidogyne javanica on Peanut in Florida

  • R. Cetintas
  • R. D. Lima
  • M. L. Mendes
  • J. A. Brito
  • D. W. Dickson
Keywords: arachis hypogaea, electrophoresis, esterase phenotype, host race, malate dehydrogenase phenotype, meloidogyne arenaria, meloidogyne javanica, nematode, peanut, root-knot nematode


A mixed population of Meloidogyne arenaria race 1 and M. javanica race 3 is reported on peanut from a field in Levy County, Florida. Confirmation of M. javanica on peanut is based on esterase and malate dehydrogenase isozyme patterns resolved on polyacrylamide slab gels following electrophoresis, and perineal patterns. Up to 29% of 290 individual females collected from peanut roots in the field in autumn 2002 showed a typical esterase J3 phenotype for M. javanica. This is the third report of M. javanica infecting peanut in the United States.