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Culturing and Genetically Manipulating Entomopathogenic Nematodes
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Culturing and Genetically Manipulating Entomopathogenic Nematodes

Published on: March 31, 2022

Infection of Pratylenchus penetrans by Nematode-pathogenic fungi

P Timper, B B Brodie

    Journal of Nematology
    |March 13, 2009
    PubMed

    Insights

    Hirsutella rhossiliensis effectively controls the plant-parasitic nematode Pratylenchus penetrans. This fungus, along with certain trapping fungi, shows promise for biological control of this damaging agricultural pest.

    Area of Science:

    • Agricultural Science
    • Mycology
    • Nematology

    Background:

    • Plant-parasitic nematodes like Pratylenchus penetrans cause significant crop damage worldwide.
    • Biological control agents offer a sustainable alternative to chemical nematicides.
    • Fungi are increasingly explored for their potential to manage nematode populations.

    Purpose of the Study:

    • To evaluate the pathogenicity of various fungal isolates against Pratylenchus penetrans.
    • To assess the efficacy of selected fungi in reducing nematode populations under laboratory and soil conditions.

    Main Methods:

    • In vitro pathogenicity assays of eleven fungal isolates against Pratylenchus penetrans on agar plates.
    • Nematode trapping assays using known nematode-antagonizing fungi.
    • Controlled experiments in sand and soil to determine nematode reduction by promising fungal candidates.

    Main Results:

    • Hirsutella rhossiliensis demonstrated high virulence against Pratylenchus penetrans.
    • Trapping fungi including Arthrobotrys dactyloides and Monacrosporium ellipsosporum were effective in killing nematodes.
    • Soil moisture significantly influenced the survival of Pratylenchus penetrans in the presence of H. rhossiliensis.
    • Hirsutella rhossiliensis and Monacrosporium ellipsosporum reduced Pratylenchus penetrans populations by up to 53% in soil.

    Conclusions:

    • Hirsutella rhossiliensis is a potent biological control agent for Pratylenchus penetrans.
    • Certain nematode-trapping fungi also show potential for nematode management.
    • Environmental factors like soil moisture can impact the efficacy of fungal biocontrol agents.
    Keywords:
    Hirsutella rhossiliensisMonacrosporium ellipsosporumPratylenchus penetransbiological controlmigratory endoparasitenematodenematophagous fungiroot lesion nematode

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