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

<p>A total of 27 grain sorghum hybrids were evaluated in a series of greenhouse experiments to determine their susceptibility to <italic>Meloidogyne incognita</italic> race 3 and <italic>M. graminis.</italic> Each hybrid was inoculated with 2,000 nematode eggs/pot. Reproduction by <italic>M. incognita</italic> was numerically greater than <italic>M. graminis</italic> on 93% of the hybrids tested, indicating that grain sorghum is a better host for <italic>M. incognita</italic> than <italic>M. graminis</italic>. A wide variation in host suitability was observed on these hybrids in a second experiment as reproduction by <italic>M. incognita</italic> ranged from 395 to 3,818 eggs/g of root. Only two hybrids, Terral RV9782 and RV9823, consistently supported <italic>,</italic>20% reproduction by <italic>M. incognita</italic> compared to the most susceptible hybrid, Golden Acres 5556. Reproduction of four isolates of <italic>M. incognita</italic> was evaluated on six selected hybrids in a third greenhouse experiment. Hybrid susceptibility was similar to that observed in the previous experiment for all isolates. A difference in isolate aggressiveness was observed between two of the four isolates across all hybrids. In fields where damaging populations of <italic>M. incognita</italic> are present, most grain sorghum hybrids will likely maintain or increase the nematode population for the subsequent crop.</p>
</abstract>

A total of 27 grain sorghum hybrids were evaluated in a series of greenhouse experiments to determine their susceptibility to Meloidogyne incognita race 3 and M. graminis. Each hybrid was inoculated with 2,000 nematode eggs/pot. Reproduction by M. incognita was numerically greater than M. graminis on 93% of the hybrids tested, indicating that grain sorghum is a better host for M. incognita than M. graminis. A wide variation in host suitability was observed on these hybrids in a second experiment as reproduction by M. incognita ranged from 395 to 3,818 eggs/g of root. Only two hybrids, Terral RV9782 and RV9823, consistently supported ,20% reproduction by M. incognita compared to the most susceptible hybrid, Golden Acres 5556. Reproduction of four isolates of M. incognita was evaluated on six selected hybrids in a third greenhouse experiment. Hybrid susceptibility was similar to that observed in the previous experiment for all isolates. A difference in isolate aggressiveness was observed between two of the four isolates across all hybrids. In fields where damaging populations of M. incognita are present, most grain sorghum hybrids will likely maintain or increase the nematode population for the subsequent crop.

Reproduction of <italic>Meloidogyne incognita</italic> and <italic>M. graminis</italic>
on Several Grain Sorghum Hybrids

Journal of Nematology

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

Reproduction of  and 
on Several Grain Sorghum Hybrids

A total of 27 grain sorghum hybrids were evaluated in a series of greenhouse experiments to determine their susceptibility to Meloidogyne incognita race 3 and...

Reproduction of Meloidogyne incognita and M. graminis on Several Grain Sorghum Hybrids

Published Online: Jul 24, 2017

Page range: 156 - 161

Received: Feb 22, 2017

DOI: https://doi.org/10.21307/jofnem-2017-060

Keywords
grain sorghum, southern root-knot nematode, reproduction, resistance

© 2017 Katherine Hurd et al., published by Sciendo

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

Reproduction of Meloidogyne incognita and M. graminis on Several Grain Sorghum Hybrids

Published Online: Jul 24, 2017

Page range: 156 - 161

Received: Feb 22, 2017

DOI: https://doi.org/10.21307/jofnem-2017-060

Keywordsgrain sorghum, southern root-knot nematode, reproduction, resistance

© 2017 Katherine Hurd et al., published by Sciendo

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

Keywords
grain sorghum, southern root-knot nematode, reproduction, resistance