Gracilacus mira		Contents		Rev 05/20/2005
pin nematodes		Classification		Hosts
		Morphology and Anatomy		Life Cycle
Return to Gracilacus Menu		Economic Importance		Damage
		Distribution		Management
Return to Tylenchulidae Menu		Feeding		References
		Go to Nemaplex HomePage

Classification:

Tylenchida
       Tylenchina
        Criconematoidea
         Tylenchulidae
          Paratylenchinae
           Gracilacus mira Raski (1962)
    Synonyms:
      None.

Back to Top

Morphology and Anatomy:

Back to Top

Distribution:

Northern California, vineyard soil.

Contra Costa and Mendocino counties, California.

Back to Top

Economic Importance:

Back to Top

Feeding:

Young, vermiform, female inserts its long stylet into root tissues and remains attached to the root surface by the stylet. Nematode feeds in epidermal, cortical parenchyma and sclerenchyma cells. Feeding induces cell wall thickening.

Back to Top

Hosts:

Type host: Grape, Vitis vinifera, on St. George rootstock.

Back to Top

Life Cycle:

Young, vermiform, female inserts its long stylet into root tissues and remains attached to the root surface by the stylet. Female body swells as gonads mature. Eggs are deposited in a gelatinous matrix which surrounds the female, eggs and and newly hatched J2s.

Back to Top

Damage:

Back to Top

Management:

Back to Top

References:

Raski, D.J. 1962.  Paratylenchidae n.fam. with description of five new species of Gracilacus n.g. and an emendation of Cacopaurus Thorne, 1943, Paratylenchus Micoletzky, 1922 and Criconematidae Thorne, 1943.  Proc. Helminthol. Soc. Washington 29:189-207.

Back to Top

For more information about nematodes, Go to Nemaplex Home Page.

Copyright © 1999 by Howard Ferris.
Revised: May 20, 2005.