Hirschmanniella pomponiensis

 

Contents

 

Rev 12/10/2019

Classification Hosts
Morphology and Anatomy Life Cycle

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Economic Importance Damage
Distribution Management
Return to Pratylenchidae Menu Feeding  References
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Classification:

        Tylenchina
        Tylenchoidea
         Pratylenchidae
          Pratylenchinae
           Hirschmanniella pomponiensis Abdel-Rahman and Maggenti, 1987

 

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Morphology and Anatomy:

  Average morphometric dimensions - females
Body length (mm) 1.9
a (=body length (μm) / body width (μm) 66
b (= body length / esophagus length) 14
Stylet length (μm) 20
Males common
Abdel-Rahman and Maggenti (1987)
 
Female head region of Hirschmanniella pomponiensis.

Note that the lip region is not offset and has five annules.  Slit-like amphid aperture below lip region.

Hirschmanniella anterior region.  Note very long overlapping esophageal glands

One gonad of diovarial female showing oocytes and spermatheca.
 
Female tail with terminal spike

Female tail, lateral field areolated.

Male caudal alae and tail region.

 



Female: whole body

Metacorpus and excretory pore 
 
Vulva and uteri

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

 
 
 
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Distribution:

Northern California

Type Locality Pomponio State Beach, San Mateo County, California

Type host: Bulrush, Scirpus robustus Pursh.

Type locality 2 Type locality 1 Creek1
Freshwater creek draining at beach, with bulrushes at edge
Creek2
Freshwater creek draining at beach, with bulrushes at edge
Pollution warning
Contamination sign probably refers to cattle pasture to east
sampling site
Ferris sampling site west of bridge on US Hwy 1;
N37° 17.972’, W122° 24.282’
Photographs by Howard Ferris (August 18, 2010)    

 

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Economic Importance:

D-rated pests in California.

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Feeding:

Migratory endoparasite of roots.  Juveniles and adults enter behind the root tip and move in air channels; can also migrate into older roots. 

 

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Hosts:

Bulrush (Scirpus robustus)

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

 Males and Females present.

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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:

Abdel-Rahman, F. and Maggenti, A.R. 1987. Hirschmanniella pomponiensis n. sp. (Nemata:Pratylenchidae), parasitic on bulrush, Scirpus robustus Pursh. Journal of Nematology 19:147-151.
Photomicrographs by John Chitambar, CDFA. and Howard Ferris

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Copyright © 1999 by Howard Ferris.
Revised: December 10, 2019.