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Related Experiment Video

Updated: Jun 24, 2026

Observation and Quantification of Mating Behavior in the Pinewood Nematode, Bursaphelenchus xylophilus
09:55

Observation and Quantification of Mating Behavior in the Pinewood Nematode, Bursaphelenchus xylophilus

Published on: December 25, 2016

Temporal Pattern of Pinewood Nematode Exit from the Insect Vector Monochamus carolinensis.

M J Linit

    Journal of Nematology
    |March 17, 2009
    PubMed
    Summary

    Pinewood nematode dauer larvae exit Monochamus carolinensis beetles over time. Most larvae remained with the beetle vector for 3 weeks, with exit rates increasing after the first week.

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    Pathotypes of the Pinewood Nematode Bursaphelenchus xylophilus.

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    Relative susceptibility of four pine species to infection by pinewood nematode.

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    Nemtaode-vector relationships in the pine wilt disease system.

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    Transmission of Pinewood Nematode Through Feeding Wounds of Monochamus carolinensis (Coleoptera: Cerambycidae).

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    Within-wood Spatial Dispersion of the Pinewood Nematode, Bursaphelenchus xylophilus.

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    Transmission of Bursaphelenchus xylophilus through Oviposition Wounds of Monochamm carolinensis (Coleoptera: Cerambycidae).

    Journal of nematology·2009

    Area of Science:

    • Entomology
    • Nematology
    • Forestry

    Background:

    • The pinewood nematode (Bursaphelenchus xylophilus) is a significant forest pest.
    • Monochamus carolinensis beetles are the primary vectors for this nematode.

    Purpose of the Study:

    • To investigate the temporal dynamics of dauer larval exit from the Monochamus carolinensis beetle vector.
    • To quantify the rate at which pinewood nematode dauer larvae leave their beetle hosts over time.

    Main Methods:

    • Laboratory-reared Monochamus carolinensis beetles were used.
    • Dauer larval exit rates were assessed by counting nematodes on beetles at 0, 7, 14, and 21 days post-emergence.
    • Nematode density was compared across different beetle age groups.

    Main Results:

    Keywords:
    Bursaphelenchus xylophilusMonochamus carolinensisinsect vectorpine wilt diseasepinewood nematode

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    • Dauer larval density was highest in newly emerged beetles.
    • Nematode exit rates were low in the first week (4.5%) but increased in subsequent weeks (20.5% in week 2, 13.1% in week 3).
    • A total of 38.1% of initial dauer larvae exited the beetles within the 3-week observation period.

    Conclusions:

    • Monochamus carolinensis beetles retain a significant proportion of pinewood nematode dauer larvae for at least three weeks.
    • Nematode exit from the vector is a gradual process, with higher rates observed after the initial week of the beetle's adult life.