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

<p>Oilseed radish and oat are cool season annual crops that are potentially used as “trap” or “biofumigant” crops for the suppression of plant-parasitic nematodes in soil. Cultivars of oilseed radish (Carwoodi, Cardinal, Final, Image, Concorde, Control, Eco-Till, Karakter and Cannavaro), white (Tachiibuki) and black (Pratex) oats were evaluated for their ability to reduce reproduction of three root-knot nematode species: <italic>Meloidogyne javanica</italic>, <italic>M. incognita</italic> race 3, and <italic>M. arenaria</italic> race 1. Nematode penetration and development were also evaluated using selected resistant and susceptible cultivars under greenhouse conditions. Root galling severity, number of eggs per gram of fresh root, and rate of reproduction varied among the cultivars in response to nematode infection. Oilseed radish cv. Carwoodi was resistant to <italic>M. javanica</italic>, whereas Karakter and Concorde were maintenance hosts allowing the nematode to maintain or increase its population on the plants. For <italic>M. incognita</italic>, Control and Carwoodi oilseed radish and Tachiibuki oat were resistant hosts. The cultivars that supported little reproduction of <italic>M. arenaria</italic> were Karakter and Carwoodi radish, and Tachiibuki oat. Comparable numbers of nematodes entered the roots of susceptible and resistant cultivars of oilseed radish and oat during early stages of infection. However, the development of the nematodes as evident from counting young and egg-laying females in roots were significantly decreased or inhibited in the resistant cultivars compared to the susceptible cultivars indicating that resistance occurs at post-infection stages. Histopathological examinations of galled-root tissues also revealed the susceptibility and resistance responses of selected cultivars of oilseed radish and oat to these nematode species.</p>
</abstract>

Oilseed radish and oat are cool season annual crops that are potentially used as “trap” or “biofumigant” crops for the suppression of plant-parasitic nematodes in soil. Cultivars of oilseed radish (Carwoodi, Cardinal, Final, Image, Concorde, Control, Eco-Till, Karakter and Cannavaro), white (Tachiibuki) and black (Pratex) oats were evaluated for their ability to reduce reproduction of three root-knot nematode species: Meloidogyne javanica, M. incognita race 3, and M. arenaria race 1. Nematode penetration and development were also evaluated using selected resistant and susceptible cultivars under greenhouse conditions. Root galling severity, number of eggs per gram of fresh root, and rate of reproduction varied among the cultivars in response to nematode infection. Oilseed radish cv. Carwoodi was resistant to M. javanica, whereas Karakter and Concorde were maintenance hosts allowing the nematode to maintain or increase its population on the plants. For M. incognita, Control and Carwoodi oilseed radish and Tachiibuki oat were resistant hosts. The cultivars that supported little reproduction of M. arenaria were Karakter and Carwoodi radish, and Tachiibuki oat. Comparable numbers of nematodes entered the roots of susceptible and resistant cultivars of oilseed radish and oat during early stages of infection. However, the development of the nematodes as evident from counting young and egg-laying females in roots were significantly decreased or inhibited in the resistant cultivars compared to the susceptible cultivars indicating that resistance occurs at post-infection stages. Histopathological examinations of galled-root tissues also revealed the susceptibility and resistance responses of selected cultivars of oilseed radish and oat to these nematode species.

Differences in parasitism of root-knot nematodes (<italic>Meloidogyne</italic> spp.) on oilseed radish and oat

Journal of Nematology

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

Differences in parasitism of root-knot nematodes ( spp.) on oilseed radish and oat

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Oilseed radish and oat are cool season annual crops that are potentially used as “trap” or “biofumigant” crops for the suppression of plant-parasitic nematodes...

Differences in parasitism of root-knot nematodes (Meloidogyne spp.) on oilseed radish and oat

Publié en ligne: 24 avr. 2020

Pages: 1 - 10

Reçu: 02 janv. 2020

DOI: https://doi.org/10.21307/jofnem-2020-043

Mots clés
Host response, histopathology, oilseed radish, oat, root-knot nematodes, resistance

© 2020 Negin Hamidi et al., published by Sciendo.

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

Differences in parasitism of root-knot nematodes (Meloidogyne spp.) on oilseed radish and oat

Publié en ligne: 24 avr. 2020

Pages: 1 - 10

Reçu: 02 janv. 2020

DOI: https://doi.org/10.21307/jofnem-2020-043

Mots clésHost response, histopathology, oilseed radish, oat, root-knot nematodes, resistance

© 2020 Negin Hamidi et al., published by Sciendo.

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

Mots clés
Host response, histopathology, oilseed radish, oat, root-knot nematodes, resistance