**2. Diversity of root-knot nematode**

RKN are among the most successful parasites because of the huge range of hosts and flexible behavior in adapting to a variety of environmental conditions [7]. The

*Meloidogyne* genus has almost 100 species [8]. However, the four species are of prime significance including *Meloidogyne javanica*, *Meloidogyne arenaria*, *Meloidogyne incognita*, and *M. hapla*) [9].
