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Fluopyram or Resistant Cultivars Manage Meloidogyne arenaria Infestation in Virginia-Type Peanut Production Cover

Fluopyram or Resistant Cultivars Manage Meloidogyne arenaria Infestation in Virginia-Type Peanut Production

Journal of Nematology
Volume 57 (2025): Issue 1 (February 2025)
By: Zane J. Grabau,  Sabina Budhathoki,  Rebeca Sandoval Ruiz and  Chang Liu  
Open Access
|Apr 2025

Figures & Tables

Figure 1:

Peanut root-knot nematode egg abundances from peanut roots at midseason (6 weeks after planting) in 2022 and 2023 as affected by cultivars and nematicide treatment. “B-II Fluop.” indicates Bailey II cultivar with infurrow fluopyram application. Other treatment names indicate cultivars without nematicide application. Within each subfigure, means with different letters are significantly different (Fisher’s protected LSD, α = 0.05).
Peanut root-knot nematode egg abundances from peanut roots at midseason (6 weeks after planting) in 2022 and 2023 as affected by cultivars and nematicide treatment. “B-II Fluop.” indicates Bailey II cultivar with infurrow fluopyram application. Other treatment names indicate cultivars without nematicide application. Within each subfigure, means with different letters are significantly different (Fisher’s protected LSD, α = 0.05).

Figure 2:

Peanut root-knot nematode soil abundances before planting, at midseason (6 weeks after planting), and at harvest in 2022 and 2023 as affected by cultivars and nematicide treatment. “B-II Fluop.” indicates Bailey II cultivar with in-furrow fluopyram application. Other treatment names indicate cultivars without nematicide application. Within each subfigure, means with different letters are significantly different (Fisher’s protected LSD, α = 0.05).
Peanut root-knot nematode soil abundances before planting, at midseason (6 weeks after planting), and at harvest in 2022 and 2023 as affected by cultivars and nematicide treatment. “B-II Fluop.” indicates Bailey II cultivar with in-furrow fluopyram application. Other treatment names indicate cultivars without nematicide application. Within each subfigure, means with different letters are significantly different (Fisher’s protected LSD, α = 0.05).

Figure 3:

Ring nematode soil abundances before planting, at midseason (6 weeks after planting), and at harvest in 2022 and 2023 as affected by cultivars and nematicide treatment. “B-II Fluop.” indicates Bailey II cultivar with in-furrow fluopyram application. Other treatment names indicate cultivars without nematicide application. Within each subfigure, means with different letters are significantly different (Fisher’s protected LSD, α = 0.05).
Ring nematode soil abundances before planting, at midseason (6 weeks after planting), and at harvest in 2022 and 2023 as affected by cultivars and nematicide treatment. “B-II Fluop.” indicates Bailey II cultivar with in-furrow fluopyram application. Other treatment names indicate cultivars without nematicide application. Within each subfigure, means with different letters are significantly different (Fisher’s protected LSD, α = 0.05).

Figure 4:

Peanut yield and marginal return on investment in 2022 and 2023 as affected by cultivars and nematicide treatment. “B-II Fluop.” indicates Bailey II cultivar with in-furrow fluopyram application. Other treatment names indicate cultivars without nematicide application. Marginal return (in US Dollars) is relative to mean income (crop value minus product cost only) for Bailey II. Within each subfigure, means with different letters differ significantly (Fisher’s protected LSD, α = 0.05).
Peanut yield and marginal return on investment in 2022 and 2023 as affected by cultivars and nematicide treatment. “B-II Fluop.” indicates Bailey II cultivar with in-furrow fluopyram application. Other treatment names indicate cultivars without nematicide application. Marginal return (in US Dollars) is relative to mean income (crop value minus product cost only) for Bailey II. Within each subfigure, means with different letters differ significantly (Fisher’s protected LSD, α = 0.05).

Figure 5:

Total free-living nematode soil abundances before planting, at midseason (6 weeks after planting), and at harvest in 2022 and 2023 as affected by cultivars and nematicide treatment. “B-II Fluop.” indicates Bailey II cultivar with in-furrow fluopyram application. Other treatment names indicate cultivars without nematicide application. Within each subfigure, means with different letters differ significantly (Fisher’s protected LSD, α = 0.05).
Total free-living nematode soil abundances before planting, at midseason (6 weeks after planting), and at harvest in 2022 and 2023 as affected by cultivars and nematicide treatment. “B-II Fluop.” indicates Bailey II cultivar with in-furrow fluopyram application. Other treatment names indicate cultivars without nematicide application. Within each subfigure, means with different letters differ significantly (Fisher’s protected LSD, α = 0.05).

Cultivar and nematicide effects on agronomic measurements in 2022 and 2023 trials_ Numbers in parentheses are days after planting_

Treatment----------------------------------------2022---------------------------------------
Stand (12)Root weight (42)bShoot weight (42)bVigor (42)Vigor (68)Vigor (95)Stem rot (143)cLeafspot (143)d
Bailey II3.0 a4.642 a87 a89 a85 a15.8 a
Bailey II + Fluopyram2.8 ab3.634 a88 ab95 a85 a16.3 a
TifJumbo2.5 b3.933 ab67 c63 b74 b14.7 b
Georgia-19HP2.5 b3.521 b77 bc50 b59 c23.5 c

Schedule for data collection and trial establishment_ Numbers in parentheses are days after planting_

Event20222023
Preplant soil sampling28 April (0)8 May (0)
Planting28 April (0)8 May (0)
Stand count 110 May (12)22 May (14)
Vigor rating 19 June (42)19 June (42)
Vigor rating 25 July (68)21 July (74)a
Vigor rating 32 Aug (95)28 Aug (112)b
Midseason soil sampling9 June (42)22 June (42)
Midseason root sampling9 June (42)22 June (45)
Harvest soil sampling6 Sep (129)6 Sep (121)
Leafspot and stem rot rating20 Sep (143)19 Sep (134)
Peanut inverting20 Sep (143)19 Sep (134)
Peanut combining22 Sep (145)25 Sep (137)
DOI: https://doi.org/10.2478/jofnem-2025-0010 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X
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Language: English
Submitted on: Aug 2, 2024
|
Published on: Apr 22, 2025
Published by: Society of Nematologists, Inc.
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year
Keywords:
Arachis hypogea,
fluopyram,
free-living nematodes,
management,
Meloidogyne arenaria,
nematicide,
peanut,
resistance
Related subjects:
Life sciences,
Life sciences, other

© 2025 Zane J. Grabau, Sabina Budhathoki, Rebeca Sandoval Ruiz, Chang Liu, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

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