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Related Concept Videos

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  5. Biological Sciences
  7. Plant Biology
  9. Phycology (incl. Marine Grasses)
  11. Evaluation Of Weed Species For Host Status To The Root-knot Nematodes Meloidogyne Enterolobii And M. Incognita Race 4

Evaluation of Weed Species for Host Status to the Root-Knot Nematodes Meloidogyne enterolobii and M. incognita Race 4

Tanner Schwarz1, Chitra2, Katherine Jennings2

  • 1Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695.

Journal of Nematology
|April 23, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

Weeds can host damaging root-knot nematodes, impacting crops. This study identified weed species that are hosts or poor hosts to Meloidogyne enterolobii and Meloidogyne incognita race 4, aiding nematode management.

Area of Science:

  • Plant Pathology
  • Nematology
  • Weed Science

Background:

  • Weeds compete with crops and can harbor plant-parasitic nematodes, serving as inoculum sources.
  • Root-knot nematodes (Meloidogyne spp.) cause significant agricultural damage worldwide.
  • Understanding weed host status is crucial for integrated nematode management strategies.

Purpose of the Study:

  • To determine the host status of ten common North Carolina weed species for Meloidogyne enterolobii and Meloidogyne incognita race 4.
  • To assess the potential of these weeds to act as reservoirs for these economically important nematode pests.
  • To inform weed management practices aimed at controlling root-knot nematode populations.

Main Methods:

  • Ten weed species were inoculated with 5,000 eggs/plant of either M. enterolobii or M. incognita race 4 in greenhouse trials.
Keywords:
greenhouse bioassayguava root-knot nematodereproductive factorroot galling

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  • Root galling severity and egg production were assessed 60 days post-inoculation.
  • Reproduction factor (Rf) was calculated to classify weed host status.

    • Main Results:

    • Four weed species (Datura stramonium, Digitaria sanguinalis, Senna obtusifolia, Cyperus esculentus) were poor hosts (Rf < 1) to both nematodes.
    • Four weed species (Ipomoea hederacea, Amaranthus palmeri, Portulaca pilosa, Ipomoea lacunosa) were hosts (Rf > 1) to both nematodes, showing galling.
    • Sida rhombifolia and Cyperus rotundus exhibited differential host status, being poor hosts to M. enterolobii but susceptible to M. incognita.

    Conclusions:

    • Common weeds exhibit varied host responses to Meloidogyne enterolobii and Meloidogyne incognita race 4.
    • Effective root-knot nematode management requires targeted weed control, considering their differential host capabilities.
    • Identifying weed hosts is essential for developing sustainable agricultural practices and protecting crop yields.
    southern root-knot nematode