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<p>Tifguard was released in 2008 as a peanut cultivar with a high level of resistance to <italic>Meloidogyne arenaria</italic>. Our objective was to determine the role of temperature on infection and development of <italic>M. arenaria</italic> in Tifguard compared to that in the nematode susceptible cultivar, Georgia-06G. Temperature affected the rate of nematode infection and development in both Tifguard and Georgia-06G (<italic>P</italic> ≤ 0.05). In Georgia-06G, egg-laying females were observed 25, 20 or 25 days after inoculation at 28°C, 31°C, and 34°C, respectively. There were greater numbers of nematodes entering roots and acceleration of development in response to 31°C compared with that at 28°C. There was, however, a decrease in the number of nematodes entering roots and their development was retarded at 34°C compared with that occurring at 31°C. Although second-stage juveniles penetrated Tifguard roots, they did not develop further at 28°C or 31°C; however, at 34°C both females, males, and a few egg-laying females of <italic>M. arenaria</italic> were observed. The optimum temperature for nematode infection and development was 31°C in Georgia-06G. In summary, it is unlikely that high soil temperatures would lessen the effectiveness of the nematode resistance gene in Tifguard.</p>
</abstract>

Tifguard was released in 2008 as a peanut cultivar with a high level of resistance to Meloidogyne arenaria. Our objective was to determine the role of temperature on infection and development of M. arenaria in Tifguard compared to that in the nematode susceptible cultivar, Georgia-06G. Temperature affected the rate of nematode infection and development in both Tifguard and Georgia-06G (P ≤ 0.05). In Georgia-06G, egg-laying females were observed 25, 20 or 25 days after inoculation at 28°C, 31°C, and 34°C, respectively. There were greater numbers of nematodes entering roots and acceleration of development in response to 31°C compared with that at 28°C. There was, however, a decrease in the number of nematodes entering roots and their development was retarded at 34°C compared with that occurring at 31°C. Although second-stage juveniles penetrated Tifguard roots, they did not develop further at 28°C or 31°C; however, at 34°C both females, males, and a few egg-laying females of M. arenaria were observed. The optimum temperature for nematode infection and development was 31°C in Georgia-06G. In summary, it is unlikely that high soil temperatures would lessen the effectiveness of the nematode resistance gene in Tifguard.

Influence of Temperature on Susceptibility of CVS. Tifguard and Georgia-06G Peanut to <italic>Meloidogyne arenaria</italic>


Journal of Nematology

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Influence of Temperature on Susceptibility of CVS. Tifguard and Georgia-06G Peanut to

Tifguard was released in 2008 as a peanut cultivar with a high level of resistance to Meloidogyne arenaria. Our objective was to determine the role of...

Influence of Temperature on Susceptibility of CVS. Tifguard and Georgia-06G Peanut to Meloidogyne arenaria

Article Category: research-article

Pubblicato online: 31 mag 2018

Pagine: 33 - 40

Accettato: 27 lug 2017

DOI: https://doi.org/10.21307/jofnem-2018-006

Parole chiave
resistance, root-knot nematode, temperature

© 2018 Weimin Yuan et al., published by Sciendo

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

Influence of Temperature on Susceptibility of CVS. Tifguard and Georgia-06G Peanut to Meloidogyne arenaria

Article Category: research-article

Pubblicato online: 31 mag 2018

Pagine: 33 - 40

Accettato: 27 lug 2017

DOI: https://doi.org/10.21307/jofnem-2018-006

Parole chiaveresistance, root-knot nematode, temperature

© 2018 Weimin Yuan et al., published by Sciendo

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

Parole chiave
resistance, root-knot nematode, temperature