Final diagnosis


Root-knot nematodes (Meloidogyne spp. )

Some roots of this tobacco plant have galls and swellings. <i><b>Meloidogyne </b></i>sp. (root-knot nematodes)
Several roots showing galls and often isolated white swellings, <i><b>Meloidogyne </b></i>sp. (root-knot nematodes)
After a while, if the soil inoculum density is high, one can observe strings of galls and swellings which are superficially brown and suberised. <i><b>Meloidogyne</b></i> sp. (root-knot nematodes)
In each released egg a larva develops and will infest a new root. <i><b>Globodera tabacum </b></i>(cyst nematodes).