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

<p>Oregon leads the United States in nursery production of shade trees and is third in deciduous and broadleaf evergreen shrub production. Plant-parasitic nematodes have been implicated in problems with the growth of plants in nurseries and are also of phytosanitary risk. A greenhouse experiment was conducted to evaluate the host status of four trees (<italic>Quercus alba, Quercus garryana, Acer campestre, Thuja occidentalis</italic>) and two shrubs <italic>(Buxus sempervirens</italic>, <italic>Rhododendron catawbiense</italic>) to <italic>Meloidogyne incognita, Meloidogyne hapla</italic>, and <italic>Pratylenchus neglectus</italic>. Each plant/nematode treatment was replicated five times, and the experiment was conducted twice. Plants were inoculated with 3,000 eggs of <italic>M. incognita</italic> or <italic>M. hapla</italic> and 2,500 individuals of <italic>P. neglectus</italic> two weeks after planting. After three months, the plants were harvested, and the total density of nematodes in soil and roots for <italic>P. neglectus</italic> and the total density of second-stage juveniles (J2) in soil and eggs on roots for <italic>M. hapla</italic> and <italic>M. incognita</italic> were determined. The final nematode population (Pf) and reproductive factor (RF = Pf/initial population density) were calculated. For <italic>M. incognita</italic> and <italic>M. hapla</italic>, all of the ornamental trees and shrubs would be considered as fair to good hosts with RF values > 1. <italic>Meloidogyne incognita</italic> had the highest Pf (5,234 total J2 and eggs/pot) and RF value (28.4) on <italic>A. campestre</italic>. For <italic>P. neglectus</italic>, all of the ornamental trees and shrubs were fair to good hosts, except for <italic>B. sempervirens</italic>. <italic>Buxus sermpervirens</italic> was not a host for <italic>P. neglectus,</italic> with an RF value of almost 0. This is the first report of <italic>Q. alba, Q. garryana</italic>, and <italic>A. campestre</italic> as hosts for <italic>M. incognita, M. hapla</italic>, and <italic>P. penetrans</italic>. This is also the first report of <italic>T. occidentalis</italic> and <italic>R. catawbiense</italic> as hosts for <italic>P. penetrans</italic> and the non-host status of <italic>B. sermpervirens</italic> for <italic>P. penetrans</italic>.</p>
</abstract>

Oregon leads the United States in nursery production of shade trees and is third in deciduous and broadleaf evergreen shrub production. Plant-parasitic nematodes have been implicated in problems with the growth of plants in nurseries and are also of phytosanitary risk. A greenhouse experiment was conducted to evaluate the host status of four trees (Quercus alba, Quercus garryana, Acer campestre, Thuja occidentalis) and two shrubs (Buxus sempervirens, Rhododendron catawbiense) to Meloidogyne incognita, Meloidogyne hapla, and Pratylenchus neglectus. Each plant/nematode treatment was replicated five times, and the experiment was conducted twice. Plants were inoculated with 3,000 eggs of M. incognita or M. hapla and 2,500 individuals of P. neglectus two weeks after planting. After three months, the plants were harvested, and the total density of nematodes in soil and roots for P. neglectus and the total density of second-stage juveniles (J2) in soil and eggs on roots for M. hapla and M. incognita were determined. The final nematode population (Pf) and reproductive factor (RF = Pf/initial population density) were calculated. For M. incognita and M. hapla, all of the ornamental trees and shrubs would be considered as fair to good hosts with RF values > 1. Meloidogyne incognita had the highest Pf (5,234 total J2 and eggs/pot) and RF value (28.4) on A. campestre. For P. neglectus, all of the ornamental trees and shrubs were fair to good hosts, except for B. sempervirens. Buxus sermpervirens was not a host for P. neglectus, with an RF value of almost 0. This is the first report of Q. alba, Q. garryana, and A. campestre as hosts for M. incognita, M. hapla, and P. penetrans. This is also the first report of T. occidentalis and R. catawbiense as hosts for P. penetrans and the non-host status of B. sermpervirens for P. penetrans.

Host Status of Ornamental Shade Trees and Shrubs to Plant Parasitic Nematodes

Journal of Nematology

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

{"article-title":"Host Status of Ornamental Shade Trees and Shrubs to Plant Parasitic Nematodes"}

Oregon leads the United States in nursery production of shade trees and is third in deciduous and broadleaf evergreen shrub production. Plant-parasitic...

Host Status of Ornamental Shade Trees and Shrubs to Plant Parasitic Nematodes

Article Category: Research Paper

Publicado en línea: 28 jun 2024

Páginas: -

Recibido: 07 dic 2023

DOI: https://doi.org/10.2478/jofnem-2024-0024

Palabras clave
host-parasitic relationship, ornamental tree, shrubs, root-knot nematodes, root lesion nematode,

© 2024 T. Benedetti et al., published by Sciendo

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

Host Status of Ornamental Shade Trees and Shrubs to Plant Parasitic Nematodes

Article Category: Research Paper

Publicado en línea: 28 jun 2024

Páginas: -

Recibido: 07 dic 2023

DOI: https://doi.org/10.2478/jofnem-2024-0024

Palabras clavehost-parasitic relationship, ornamental tree, shrubs, root-knot nematodes, root lesion nematode,

© 2024 T. Benedetti et al., published by Sciendo

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

Palabras clave
host-parasitic relationship, ornamental tree, shrubs, root-knot nematodes, root lesion nematode,