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tobacco cyst nematode
Source: R.J. Reynolds Tobacco Company Slide Set, through: IPM Images

Meloidogynidae - (root-knot nematodes)

The family is related to the Heteroderidae and has been previously treated as a subfamily of that group. The members of the Meloidogynidae differ from those of the Heteroderidae by:

  • the feeding site is a multinucleate giant cell (not a syncytium where root cells fuse through the dissolving cell walls),
  • females are not transformed into a cyst, but lay egg masses in a protective gelatinous matrix,
  • parthenogenic reproduction is common,
  • species have a wide host range.

For details on the biology see the genus Meloidogyne.