Subanguina radicicola

 

Contents

 

Rev 11/19/2019

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

      Tylenchida
       Tylenchina
        Tylenchoidea
        Anguinidae

          Subanguina radicicola (Greeff, 1872) Paramonov 1967
  
  Synonyms:
      Heteroanguina (Chizhov, 1980)
      Afrina (Brzeski, 1981)
      Mesoanguina (Chizhov & Subbotin, 1985)
 
Originally assigned to the genus Ditylenchus as D. radicicolus.  Paramonov (1967) erected the genus Subanguina in recognition that the nematode has features intermediate between Anguina and Ditylenchus.  There are around 25 recognized species (Mai and Mullin, 1996).
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Morphology and Anatomy:

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Median bulb with valves.

Isthmus may be separated from glandular bulb by a constriction.

Esophageal glands may or may not overlap the beginning of the intestine.  

Females:  Mature females swollen or not swollen.

Oocytes of Subanguina are in two rows, not as multiple rows arranged around a rachis as in Anguina; columned uterus with four long rows of cells (about eight/twelve cells per row).  

 

Males: Testis usually without flexures.

Bursa medium sized to long, but not reaching tail end. 

[Ref: Fortuner and Maggenti,  (1987).]

  

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

 

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Distribution:

Europe, North America

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Economic Importance:

 

 

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Feeding:

Endoparasite of grass roots.  Subanguina radicicola differs from related taxa by forming galls on roots rather than above-ground plant parts.

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Hosts:

Grasses, cereals.

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:

Form galls on roots of grasses and cereals.

Galls on Poa annua roots, Photograph by Corey Almack

Causes extensive galling of roots of Poa annua, especially in the upper cm of soil.  Galls slender, often twisted in appearance. Dissection of galls releases hundreds of eggs as well as mature male and female nematodes (Nitkowski and Jackson 2003).

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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:

Fortuner and Maggenti 1987. Rev. Nematol. 10:163-176.

Mai, W.F. and P.G. Mullin, 1996.  Plant-parasitic Nematodes:  A pictorial key to genera.  Cornell Univ. Press, Ithaca. 277p

Nitkowski , N.A., N. Jackson 2003. Subanguina radicicola, the Root-Gall Nematode Infecting Poa annua in New Brunswick, Canada. Plant Disease 87:1263.

 

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Copyright © 1999 by Howard Ferris.
Revised: November 19, 2019.