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Plant-parasitic Nematodes Associated with Grasses Grown for Seed in the Willamette Valley of Oregon

H. M. Rivedal
H. M. Rivedal
, 
I. A. Zasada
I. A. Zasada
, 
T. N. Temple
T. N. Temple
, 
A. B. Peetz
A. B. Peetz
, 
L. A. Núñez-Rodríguez
L. A. Núñez-Rodríguez
, 
R. J. Starchvick
R. J. Starchvick
 und 
E. T. Braithwaite
E. T. Braithwaite
   | 10. Mai 2024
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Article Category: Research Paper
Online veröffentlicht: 10. Mai 2024
Seitenbereich: -
Eingereicht: 05. Jan. 2024
DOI: https://doi.org/10.2478/jofnem-2024-0020
Schlüsselwörter
© 2024 H. M. Rivedal et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1:

Relative abundance (proportion of total field PPN population) for each sampled field in the Spring of 2022 or 2023. Each column represents one sampled field and the total community of PPNs found in that field. Fields are organized by grass species and colored by the proportion of each PPN genus detected in the field. A column with no color (i.e., white) had undetectable populations of PPN. * indicates a field with fewer than four individual nematodes for the total population count.
Relative abundance (proportion of total field PPN population) for each sampled field in the Spring of 2022 or 2023. Each column represents one sampled field and the total community of PPNs found in that field. Fields are organized by grass species and colored by the proportion of each PPN genus detected in the field. A column with no color (i.e., white) had undetectable populations of PPN. * indicates a field with fewer than four individual nematodes for the total population count.

Figure 2:

Comparative PPN relative abundance (proportion of total field PPN population) in annual ryegrass and orchardgrass seed fields sampled in spring (top) and autumn (bottom) 2022. Each column represents one sampled field at either time point. Fields are organized by grass species and colored by the proportion of each PPN genus detected in a field. A column with no color (i.e., white) had undetectable populations of PPN. * indicates a field with fewer than four individual nematodes for the total population count.
Comparative PPN relative abundance (proportion of total field PPN population) in annual ryegrass and orchardgrass seed fields sampled in spring (top) and autumn (bottom) 2022. Each column represents one sampled field at either time point. Fields are organized by grass species and colored by the proportion of each PPN genus detected in a field. A column with no color (i.e., white) had undetectable populations of PPN. * indicates a field with fewer than four individual nematodes for the total population count.

Average plant-parasitic nematode species densities and diversity measures for all grass species sampled in 2022 and 2023.

Grass species Nb Sample time Average Density (#/100 g soil) Diversity Measuresa
Pratylenchus Meloidogyne Helicotylenchus Paratylenchus Tylenchorhynchus Xiphinema Alpha Beta Gamma
Annual ryegrass 14 Spring 2022 90 206 0 1 0 0 1.9 0.6 3
Autumn 2022 0 34 0 0 0 0 0.7 0.4 1
Bentgrass 3 Spring 2023 169 38 0 0 0 0 1.7 0.2 2
Fine fescue 3 Spring 2023 3 0 0 0 0 0 1.0 0.0 1
Orchardgrass 7 Spring 2022 227 58 22 14 1 0 2.1 1.4 5
Autumn 2022 0 20 7 0 0 1 1.1 1.7 3
Perennial ryegrass 5 Spring 2023 3 6 1 1 0 0 2.0 1.0 4
Tall fescue 5 Spring 2023 166 4 0 0 0 1 1.6 0.9 3

Percentage frequency of occurrence (%FO), mean population densities when present (# nematodes/100 g soil), and maximum population densities (# nematodes/100 g soil) of plant-parasitic nematodes associated with grass for seed crops in Oregon sampled in Spring 2022 or 2023.

Pratylenchus Meloidogyne Helicotylenchus Paratylenchus Tylenchorhynchus Xiphinema
%FOa 97 54 16 8 3 3
Meanb 117 (30.2) 172 (61.7) 26 (18.2) 32 (26.4) 7 1
Maxc 1,984 2,496 288 556 24 2

Pratylenchus spp. identified on grass for seed crops in Oregon.a

Grass type P. crenatus P. fallax P. neglectus P. penetrans P. thornei
Annual ryegrass + (11)b + (2) + (9) + (5) −c
Perennial ryegrass ndd nd nd nd nd
Bentgrass + (3) − − − −
Tall fescue + (1) − − − −
Fine fescue nd nd nd nd nd
Orchardgrass + (1) − + (6) + (2) + (2)
eISSN:
2640-396X
Sprache:
Englisch
Zeitrahmen der Veröffentlichung:
Volume Open
Fachgebiete der Zeitschrift:
Biologie, andere
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