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The NEMA Device for Efficient Extraction and Rearing of Entomopathogenic Nematodes.

Camila C Filgueiras1, Jennifer Luna-Ayala1, Catherine Anderson1

  • 1Department of Biology, UNC Asheville, One University Heights, Asheville, NC 28804, USA.

Insects
|October 28, 2025
PubMed
Summary

A new NEMA Device simplifies entomopathogenic nematode (EPN) extraction and rearing. This tool offers higher recovery rates than traditional methods, making EPN research and biological control more accessible.

Keywords:
biological controlentomopathogenic nematodesnematode extractionnematode multiplicationsustainable agriculture

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Area of Science:

  • Agricultural Science
  • Nematology
  • Biological Control

Background:

  • Entomopathogenic nematodes (EPNs) are crucial for biological control and research.
  • Conventional methods like Baermann funnels and White traps have efficiency and practicality limitations.

Purpose of the Study:

  • To introduce and evaluate the NEMA Device, a novel tool for EPN extraction and rearing.
  • To compare the NEMA Device's efficiency against traditional methods.

Main Methods:

  • The NEMA Device was constructed using PVC components.
  • Efficiency was tested by comparing nematode recovery rates with the Baermann funnel method.
  • Nematode multiplication was assessed against the White trap method.
  • Two species, *Steinernema khuongi* and *Heterorhabditis bacteriophora*, were used for validation.

Main Results:

  • The NEMA Device demonstrated higher recovery rates for both *S. khuongi* and *H. bacteriophora* compared to the Baermann method.
  • Nematode production rates using the NEMA Device were comparable to the White trap method, with no significant difference.
  • The device proved effective for nematode species of varying sizes.

Conclusions:

  • The NEMA Device provides a standardized, cost-effective, and user-friendly method for EPN extraction and multiplication.
  • This innovation enhances the accessibility and efficiency of EPN research and application in agriculture.
  • The NEMA Device has the potential to improve biological control strategies.