Penetration and development of the root-knot nematode, Meloidogyne Incognita in resistant hybrid lines of tomato

The penetration and post-penetration development of root-knot nematode, Meloidogyne incognita juveniles (J2s) were observed in case of a hybrid (FM-2), two lines (BN-10 and IIHR-550) alongwith variety Pusa Ruby, before and after transplanting of tomato crop. The degree of penetration was significantly less in the three resistant hybrid/lines compared to Pusa Ruby, where it was thirty and thirty five percent, before and after transplanting respectively. The development of J2s’ into adult females was totally restricted in two resistant lines BN-10 and IIHR-550. Whereas, in case of FM-2, only few developed into females, compared to susceptible Pusa Ruby, where it was upto ninety percent.