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Prevalence of pest nematodes associated with soybean (Glycine max) in Wisconsin from 1998 to 2021

Journal of Nematology
Volume 55 (2023): Issue 1 (February 2023)
By:
Open Access
|Mar 2024

Figures & Tables

Figure 1:

Map of Wisconsin showing counties colored according to their representation (number of bienniums) in the survey data: green = seven; dark blue = six; light blue = five; purple = four; orange = three; yellow = two; red = one; white = not included. The star symbol indicates counties with soybean planted on more than 15,000 ha in 2021. Nine agricultural districts are outlined in bold.
Map of Wisconsin showing counties colored according to their representation (number of bienniums) in the survey data: green = seven; dark blue = six; light blue = five; purple = four; orange = three; yellow = two; red = one; white = not included. The star symbol indicates counties with soybean planted on more than 15,000 ha in 2021. Nine agricultural districts are outlined in bold.

Prevalence of pest nematodes in samples shown by the crop sampled_

cropnPratylenchusSpiralXiphinemaHoplolaimusstuntstubby-rootringLongidoruscyst
soybean330984733131652029
corn21888467*37*6*18*52120*
wheat75898323531*53127
alfalfa32816941344*0603*
vegetables3876588037*83021
Chi Square 427373145331564
p 0.48<0.0001<0.00010.0001<0.00010.640.530.03<0.0001

Program information and prevalence of cyst nematodes for all samples and every farm that was assayed for cyst nematodes_

BienniumNumber of counties sampledNumber of samplesNumber of farms sampleda% samples positive for cyst nematodes% farms positive for cyst nematodesbOdds Ratio current biennium vs 1998–1999
1998 – 1999426594271616
2010 – 20113837915022*23*1.84*
2012 – 20135111213772231*(p = 0.06)2.59***
2014 – 201554126841322302.63***
2016 – 201749113229926*40**3.87***
2018 – 201949158833429*434.86***
2020 – 202151186232027393.75***

Prevalence of all pest nematode from 2012 to 2021 at the sample and farm scale_

Pest nematodesasamples (6971)farms (n = 1743)Odds ratioc
% positive% positive(p < 0.0001)
Pratylenchus spp.849221.27
Spiral nematodes70786.33
Xiphinema spp.33461.52
Cyst nematodes2636reference
Stunt nematodes18280.68
Stubby Root nematodes690.17
Hoplolaimus spp.570.13
Ring nematodes360.12
Longidorus spp.120.03
Chi Square statisticb6,80526,257
P< 0.0001< 0.0001

Population densities of Pratylenchus spp_ or spiral nematodes and cyst-forming species in the presence (+) and absence (−) of each other in samples collected from soybean fields in Wisconsin from 2012 to 2021_

ComparisonSamplesNematodes per 100 cm3 soilaKruskal Wallis
nMean (Maximum)Chi Squarep
Pratylenchus / − Cyst2349121 (4960)
Pratylenchus / + Cyst96071 (1508)90.63< 0.0001
Cyst / − Pratylenchus5181144 (44364)
Cyst / + Pratylenchus2791452 (49494)30.41< 0.0001

Pratylenchus species identified from 100 soil samples submitted to a nematode testing program in Wisconsin_

Species AssignmentMale-Positive Samples (n = 61)Male - Negative Samples (n = 39)
No. of SamplesNo. of CountiesNo. of SamplesNo. of Counties
Pratylenchus fallax3300
Pratylenchus dakotaensis3311
Pratylenchus alleni7700
Pratylenchus penetrans493522
Pratylenchus scribneri0055
Pratylenchus crenatus111918
DOI: https://doi.org/10.2478/jofnem-2023-0053 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X
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Language: English
Submitted on: Oct 15, 2023
Published on: Mar 30, 2024
Published by: Society of Nematologists, Inc.
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year
Keywords:
cyst,
soybean,
detection,
prevalence
Related subjects:
Life sciences,
Life sciences, other

© 2024 A. E. MacGuidwin, D. L. Smith, S. P. Conley, K. A. Saikai, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

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