<abstract xmlns="http://www.w3.org/1999/xhtml">

Root-knot nematodes (RKNs) have been shown to be challenging and persistent pests of economic crops worldwide. Among RKNs, <italic>Meloidogyne javanica</italic> is particularly important, as it rapidly spreads and has a diverse host range. Measuring its damaging threshold level will help us to develop management strategies for adequate plant protection against nematodes. In our study, we observed the relationship between a linear series of 12 initial population densities (Pi) of <italic>M. javanica</italic>, i.e., 0, 0.125, 0.25, 0.5, 1, 2, 4, 8, 16, 32, 64, and 128 second-staged juveniles (J2s) g-1 soil, and fenugreek cv. UM202 growth parameters were investigated using a Seinhorst model. A Seinhorst model was fitted to shoot length and dry weight data for fenugreek plants. A positive correlation was found between J2s inoculum levels and percent reductions in growth parameters. The 1.3 J2s of <italic>M. javanica</italic> g-1 soil were found to damage threshold levels with respect to shoot length and shoot dry weight of fenugreek plants. The minimum relative values (m) for shoot length and shoot dry weight were 0.15 and 0.17, respectively, at Pi =128 J2s g-1 soil. The maximum nematode reproduction rate (Pf /Pi) was 31.6 at an initial population density (Pi) of 2 J2s g-1 soil.</abstract>

Root-knot nematodes (RKNs) have been shown to be challenging and persistent pests of economic crops worldwide. Among RKNs, Meloidogyne javanica is particularly important, as it rapidly spreads and has a diverse host range. Measuring its damaging threshold level will help us to develop management strategies for adequate plant protection against nematodes. In our study, we observed the relationship between a linear series of 12 initial population densities (Pi) of M. javanica, i.e., 0, 0.125, 0.25, 0.5, 1, 2, 4, 8, 16, 32, 64, and 128 second-staged juveniles (J2s) g-1 soil, and fenugreek cv. UM202 growth parameters were investigated using a Seinhorst model. A Seinhorst model was fitted to shoot length and dry weight data for fenugreek plants. A positive correlation was found between J2s inoculum levels and percent reductions in growth parameters. The 1.3 J2s of M. javanica g-1 soil were found to damage threshold levels with respect to shoot length and shoot dry weight of fenugreek plants. The minimum relative values (m) for shoot length and shoot dry weight were 0.15 and 0.17, respectively, at Pi =128 J2s g-1 soil. The maximum nematode reproduction rate (Pf /Pi) was 31.6 at an initial population density (Pi) of 2 J2s g-1 soil.

A Seinhorst Model Determined the Host-Parasite Relationships of <italic>Meloidogyne javanica</italic> Infecting Fenugreek cv. UM202

Journal of Nematology

This work is licensed under the Creative Commons Attribution 4.0 International License.

A Seinhorst Model Determined the Host-Parasite Relationships of  Infecting Fenugreek cv. UM202

Root-knot nematodes (RKNs) have been shown to be challenging and persistent pests of economic crops worldwide. Among RKNs, Meloidogyne javanica is particularly...

A Seinhorst Model Determined the Host-Parasite Relationships of Meloidogyne javanica Infecting Fenugreek cv. UM202

Article Category: Research Paper

Published Online: Feb 28, 2023

Page range: -

Received: Aug 21, 2022

DOI: https://doi.org/10.2478/jofnem-2023-0005

Keywords
Fenugreek, Reproduction factor, Root-knot nematode, Threshold level, Host-parasitic relationship,

© 2023 Nadeem et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

A Seinhorst Model Determined the Host-Parasite Relationships of Meloidogyne javanica Infecting Fenugreek cv. UM202

Article Category: Research Paper

Published Online: Feb 28, 2023

Page range: -

Received: Aug 21, 2022

DOI: https://doi.org/10.2478/jofnem-2023-0005

KeywordsFenugreek, Reproduction factor, Root-knot nematode, Threshold level, Host-parasitic relationship,

© 2023 Nadeem et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
Fenugreek, Reproduction factor, Root-knot nematode, Threshold level, Host-parasitic relationship,