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

<p>Root-knot nematode host status of hemp cultivars of different uses (fiber, dual, CBD/CBG) and from different regions (Europe, China, US) were evaluated in five different greenhouse trials. None of the tested cultivars showed resistance to any of the tested root-knot nematode species, and all tested hemp cultivars were good hosts for root-knot nematodes, especially to mixed populations of <italic>M. javanica</italic> and <italic>M. incognita</italic>. Root gall symptoms on hemp were less severe than on cucumber (and tomato), but reproduction rates were similar. Lower infection and reproduction rates were noted for <italic>M. hapla</italic> and <italic>M. enterolobii</italic>, which were probably due to the colder temperatures at the time of the trial, as the same effect was noted for the cucumber control plants. While no negative impact on hemp shoot growth was seen in trials where nematodes were added to pasteurized soil, a significant and visible negative effect on hemp growth was noted when two CBG hemp cultivars were planted in heavily naturally root-knot infested soil. This result indicates that hemp is not only a good host to root-knot nematodes, but also that root-knot can be a limiting factor for hemp production in Florida and other places with high abundance and pressure of root-knot nematodes.</p>
</abstract>

Root-knot nematode host status of hemp cultivars of different uses (fiber, dual, CBD/CBG) and from different regions (Europe, China, US) were evaluated in five different greenhouse trials. None of the tested cultivars showed resistance to any of the tested root-knot nematode species, and all tested hemp cultivars were good hosts for root-knot nematodes, especially to mixed populations of M. javanica and M. incognita. Root gall symptoms on hemp were less severe than on cucumber (and tomato), but reproduction rates were similar. Lower infection and reproduction rates were noted for M. hapla and M. enterolobii, which were probably due to the colder temperatures at the time of the trial, as the same effect was noted for the cucumber control plants. While no negative impact on hemp shoot growth was seen in trials where nematodes were added to pasteurized soil, a significant and visible negative effect on hemp growth was noted when two CBG hemp cultivars were planted in heavily naturally root-knot infested soil. This result indicates that hemp is not only a good host to root-knot nematodes, but also that root-knot can be a limiting factor for hemp production in Florida and other places with high abundance and pressure of root-knot nematodes.

Host status and susceptibility of <italic>Cannabis sativa</italic> cultivars to root-knot nematodes

Department of Entomology and Nematology, Gulf Coast Research and Education Center

Journal of Nematology

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

Host status and susceptibility of  cultivars to root-knot nematodes

Root-knot nematode host status of hemp cultivars of different uses (fiber, dual, CBD/CBG) and from different regions (Europe, China, US) were evaluated in five...

Host status and susceptibility of Cannabis sativa cultivars to root-knot nematodes

Article Category: Research Paper

Published Online: Mar 14, 2024

Page range: -

Received: Apr 17, 2023

DOI: https://doi.org/10.2478/jofnem-2024-0003

Keywords
hemp, spp., cultivars

© 2024 J. Coburn et al., published by Sciendo

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

Host status and susceptibility of Cannabis sativa cultivars to root-knot nematodes

Article Category: Research Paper

Published Online: Mar 14, 2024

Page range: -

Received: Apr 17, 2023

DOI: https://doi.org/10.2478/jofnem-2024-0003

Keywordshemp, spp., cultivars

© 2024 J. Coburn et al., published by Sciendo

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

Keywords
hemp, spp., cultivars