Radopholoides japonicus

  

Contents

  

Rev 12/16/2024

  Classification Hosts
Morphology and Anatomy Life Cycle
Return to Radopholoides Menu Economic Importance Damage
Distribution Management
Return to Pratylenchidae Menu Feeding  References
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Classification:

        Chromadorea
       Rhabditida
       Tylenchina
        Tylenchoidea
         Pratylenchidae
          Pratylenchinae


           Radopholoides japonicus Maria, Gu, Fang, He, Castillo & Li. 2017

 

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Morphology and Anatomy:

Radopholoides is characterized by the monodelphic female reproductive system, four (occasionally three) lateral lines, stylet less than 20 um long, dorsal overlap of the esophageal glands over the intestine, a conoid tail with rounded terminus, and phasmids located anteriorly in the tail region. The male has a high, rounded lip region  and  the bursa envelops the tail tip; the spicules are cephalated and pointed, the gubernaculum is about half as long as the spicule; the cloacal lips are raised and rounded (Geraert, 2013; Maria et al., 2017).

The major difference betwqeen Radopholoides and Radopholus is the absence of the posterior genital branch in females.

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 Female:  
  • lip region  low and rounded, slightly offset from body contour; labial framework well-developed
  • distinct cuticular striation; lateral field with four incisures
  • Robust stylet, rounded knobs sloping anteriorly
  • DEGO 3.5 um posterior to stylet knobs
  • Esophagus overlapping intestine dorsally
  • monodelphic, prodelphic, squarish spermatheca,
  • vulva a transverse slit, lips not protruding
  • posterior genital branch reduced to a small post-uterine sac
  • tail conoid, tapering to a broadly-rounded terminus
  • phasmids pore-like, 6-8 body striations posterior to anus

 

Males:

  • not found

 

Ref: Maria et al. (2017)
 



Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:
 
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Distribution:

Reported associated with Podocarpus macrophyllus in Japan (Maria et al., 2017)

 

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Economic Importance:

 
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Feeding:

    Migratory endoparasite.    

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Hosts:

For an extensive host range list for this species, click


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Life Cycle:

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters

 

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Damage:

 

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Management:

Host Plant Resistance, Non-hosts and Crop Rotation alternatives:

For plants reported to have some level of resistance to this species, click

 

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References:

Maria, M., J. Gu, Y. Fang, J. He, P. Castillo and H. Li. 2017. Radopholoides japonicus n. sp. (Nematoda: Pratylenchidae) found in rhizosphere soil associated with Podocarpus macrophyllus from Japan. Nematology 19:1095-1105.

 

 

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Copyright 1999 by Howard Ferris.
Revised: December 16, 2024.