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

<p>The prevalence of <italic>Heterodera glycines</italic> and other cyst and vermiform genera was determined from 8,009 soil samples over two decades. Prevalence of cyst nematodes for farms increased from 16% in 1998 to 1999, reaching a peak of 40%, with marked differences among Wisconsin’s nine agricultural districts in how much the odds of a positive test increased. Estimates at the sample scale also increased over time but peaked at 29%. Assay of all nematodes beginning in 2012 showed <italic>Pratylenchus</italic>, <italic>Helicotylenchus</italic>, and <italic>Xiphinema</italic> to be more prevalent in Wisconsin soybean fields than cyst nematodes. Prevalence estimates for <italic>Pratylenchus</italic> and <italic>Helicotylenchus</italic> for soybean and rotation crops ranged from 76 to 89% and 58 to 83%, respectively. Species identification of <italic>Pratylenchus</italic> from a subset of the samples revealed six species. The majority of cyst-positive samples were infested with <italic>Pratylenchus</italic>, and count data showed that the number of cyst eggs and juveniles per 100 cm<sup>3</sup> soil was 60% lower in samples positive for <italic>Pratylenchus</italic>. The influence was reciprocal, as <italic>Pratylenchus</italic> population densities were 41% lower in samples positive for cyst nematodes, suggesting a competitive interaction. The Wisconsin soybean nematode testing program provides a useful model for estimating nematode prevalence using citizen-based surveys.</p>
</abstract>

The prevalence of Heterodera glycines and other cyst and vermiform genera was determined from 8,009 soil samples over two decades. Prevalence of cyst nematodes for farms increased from 16% in 1998 to 1999, reaching a peak of 40%, with marked differences among Wisconsin’s nine agricultural districts in how much the odds of a positive test increased. Estimates at the sample scale also increased over time but peaked at 29%. Assay of all nematodes beginning in 2012 showed Pratylenchus, Helicotylenchus, and Xiphinema to be more prevalent in Wisconsin soybean fields than cyst nematodes. Prevalence estimates for Pratylenchus and Helicotylenchus for soybean and rotation crops ranged from 76 to 89% and 58 to 83%, respectively. Species identification of Pratylenchus from a subset of the samples revealed six species. The majority of cyst-positive samples were infested with Pratylenchus, and count data showed that the number of cyst eggs and juveniles per 100 cm3 soil was 60% lower in samples positive for Pratylenchus. The influence was reciprocal, as Pratylenchus population densities were 41% lower in samples positive for cyst nematodes, suggesting a competitive interaction. The Wisconsin soybean nematode testing program provides a useful model for estimating nematode prevalence using citizen-based surveys.

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

Journal of Nematology

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

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

The prevalence of Heterodera glycines and other cyst and vermiform genera was determined from 8,009 soil samples over two decades. Prevalence of cyst nematodes...

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

Article Category: Research Paper

Published Online: Mar 30, 2024

Page range: -

Received: Oct 15, 2023

DOI: https://doi.org/10.2478/jofnem-2023-0053

Keywords
cyst, soybean, detection, prevalence

© 2023 A. E. MacGuidwin et al., published by Sciendo

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

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

Article Category: Research Paper

Published Online: Mar 30, 2024

Page range: -

Received: Oct 15, 2023

DOI: https://doi.org/10.2478/jofnem-2023-0053

Keywordscyst, soybean, detection, prevalence

© 2023 A. E. MacGuidwin et al., published by Sciendo

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

Keywords
cyst, soybean, detection, prevalence