Integrated approaches for the management of rice root-knot nematode, Meloidogyne graminicola in rice Kumar Vinod, Kumar Anil, Mann S.S., Kamboj Rubal* Department of Nematology, College of Agriculture, CCS Haryana Agricultural University, Hisar, 125 004, India *Corresponding author; Email: rubalkamboj36@gmail.com, Orchid Id: 0009-0008-5642-8838
Online Published on 12 January, 2024. Abstract The experiments were carried out in the lab, screen-house and field to manage rice root-knot nematode, Meloidogyne graminicola, in rice. In lab assays, rhizobacterial strains and phytotherapeutic substances caused mortality of M. graminicola juveniles at all dilutions, i.e., 1:5, 1:10, 1:20, 1:40 and 1:80 at 1, 2, 4, 6 and 8 days. Among the rhizobacterial strains and plant extracts, the maximum juvenile mortality was observed in Azotobacter chroococcum HT 54 (65.2%), which was at par with the aqueous extracts of Azadirachta indica (61.8%). In nursery treatments in pots, seed treatment with A. chroococcum HT 54 and application of neem cake @ 50 g/pot showed a high biocontrol efficacy against M. graminicola, promoted plant growth of rice and significantly suppressed final nematode population (147 J2/200 cc soil) as compared to untreated check (923 J2/200 cc soil). In the main field experiment, maximum plant height (124.7 cm) and grain yield (51.2 q/ha) were recorded in the treatments where two deep summer ploughings (10-day interval) and seedlings treated with A. chroococcum HT 54 + neem cake @ 50 g/pot was given. Combination of the treated nursery (A. chroococcum HT 54 + neem cake @ 50 g/pot) with deep summer ploughing significantly reduced the number of galls (29.6), no. of eggs per plant (3551) and final nematode population (138 J2/200 cc soil). Top Keywords Azotobacter chroococcum, Meloidogyne graminicola, Neem cake, Oryza sativa, Pseudomonas fluorescens, Trichoderma viride. Top |