Development of Meloidogyne incognita in Muskmelon (Cucumis melo L.)

Root-Knot Nematodes (RKNs) are destructive plant parasites, known for causing characteristic galls in plant roots that reduce crop yields and crop quality. This study focuses on Meloidogyne incognita, a major RKN species affecting muskmelon crops. The primary objective is to examine the embryonic development of M. incognita eggs and the process of penetration and maturation within muskmelon (Arka Siri) plants under greenhouse conditions. The embryonic development of M. incognita eggs was monitored using the hanging drop technique, documenting their transformation from single-cell stage eggs to second-stage juveniles over time. Root penetration analysis revealed that second-stage juveniles (J2) penetrated near the root tip region just a day after inoculation. These invaders progressed through the root tissues, feeding on both cortical and vascular tissues. Subsequent molting events led to the emergence of third-stage (J3) and fourth-stage (J4) juveniles. As time passes, immature females matured into egg-laying adults, completing the life cycle within 28-30 days in muskmelon, where temperature (25-30 °C) plays an important role. This investigation provides valuable insights into M. incognita‘s life cycle in Muskmelon plants, enhancing our understanding of the host-parasitic mechanism employed by RKNs. These findings help in developing effective strategies to combat RKN infestations, ultimately improving crop yields and overall crop quality.