Final diagnosis


Meloidogyne spp. (Root-knot nematodes)

The root system of this chicory seedling is strewn with galls and often isolated swellings; their coloring varies from dirty white to brown. <b> <i> Meloidogyne </i> sp. </b> ("root-knot nematodes")
The same symptoms are found on adult plants; galls form mainly on the portions of roots present outside the root ball. <b> <i> Meloidogyne </i> sp. </b> ("root-knot nematodes")
When the level of inoculum in the soil is high, one can see real strings of galls and swellings forming all along the roots. <b> <i> Meloidogyne </i> sp. </b> ("root-knot nematodes")
Some roots and rootlets are excessively swollen forming very characteristic galls. <b> <i> Meloidogyne </i> sp. </b> ("root-knot nematodes")
Meloidogyne2
Meloidogyne7
Meloidogyne4
Meloidogyne6
Meloidogyne1
Meloidogyne8
These galls contain one to several swollen adult females. The stylet of the female can sometimes be distinguished when it has been extracted from a gall. <b> <i> Meloidogyne </i> sp. </b> ("root-knot nematodes")
Around the roots, we can distinguish mature eggs containing a young larva with a clearly visible stylet. <b> <i> Meloidogyne </i> sp. </b> ("root-knot nematodes")
Egg of <b> <i> Meloidogyne sp. </i> </b> ("root-knot nematodes") containing a young larva with a clearly visible stylet.