Globodera mexicana

  

Contents

  

Rev 10/04/2023

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

      Tylenchida
       Tylenchina
        Tylenchoidea
         Heteroderidae
          Punctoderinae
                  
        Globodera mexicana (Campos-Vela 1967) Subbotin, Mundo-Ocampo and Baldwin, 2010

Globodera mexicana is very closely related with, and produces viable offspring with, Globodera pallida.  However, the two differ in host range and  Subbotin et al (2010) found that G. mexicana is molecularly and biochemically different from all other Globodera species.

Some nomenclature problems were caused by thwe original description being in a PhD thesis rather than a peer-reviewed publiction.  Based on morphometric and biochemicalsimilarities, the nematode was variously considered similar to G. tabacum and G.virginiae.  However, recent molecular analyses confirm the difference from other Globodera species and Subbotin et al (2010) re-established G. mecicana n.sp.

Synonyms:

Globodera bravoae Franco, Cid del Prado & Lamothe-Argumedo, 2000

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Morphology and Anatomy:

 

Females:

 

  • Round cyst nematodes
  • Some eggs deposited in gelationous matrix (see photo above)

 
 
Photographs by Ignacio Cid del Prado 

Males:

  •  Vermiform; body twisted into a C or S shape. 
  • Tail short, hemispherical.

 

Second-stage juveniles:

Molecular Diagnosis:

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

  
 

 

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Distribution:

  Cantral highlands of Mexico and Toluca Valley, Mexico Sate.

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Economic Importance:

 

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Feeding:

Sedentary semi-endoparasite of roots

Feeding site and feeding patterns typical of genus Globodera.

Nurse cell system is a multinucleate syncytium.

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Hosts:

 

For an extensive host range list for this species, click

 

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Life Cycle:

Root penetration by J2 offurs at 16-24C and is inhibited at temperatures above 28C. Life cycle was completed in 23-24 days (Campos-Vela, 1967; Subbotin et al., 2010).

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:

Reduced the fersh weight of tomato roots in greenhouse trials (Campos-Vela, 1967).

 

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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:

Campos-Vela, A. 1967; Taxonomy, life-cycle and host range of Heterodera mexicana n.sp. (Nematodea: Heteroderidae) PhD Thesis, University of Wisconsin. 70p.

Subbotin S.A., Mundo-Ocampo M. & Baldwin J.G. 2010. Systematics of Cyst Nematodes (Nematoda: Heteroderinae). Nematology Monographs and Perspectives 8A.  Brill 351p,

 


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Copyright © 1999 by Howard Ferris.
Revised: October 04, 2023.