Cactodera galinsogae




Rev 10/07/2023

  Classification Hosts
Morphology and Anatomy Life Cycle

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           Cactodera galinsogae Tovar-Soto, Cid del Prado-Vera, Nicol, Evans, Sandoval-Islas & Martinez-Garza. 2003.


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Morphology and Anatomy:



  • Cyst stage present; spherical with protruding neck and small vulval cone; circumfenestrate;
  • No bullae or vulval denticles
  • Eggs surface with a punctate pattern


Cactodera galinsogae, cyst with eggs (left) and SEM of circumfenestrate vulval cone (right)
Photographs by Ignacio Cid del Prado Vera


  • Body twisted.  

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


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Mexico. Reported from Galinsoga parviflora in fields with a history of cereal cerops in the high valleys in the central mesa of Mexico; in the states of Hidalgo and Tlaxcala,  (Tovar-Soto et al., 2008).

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Economic Importance:

On barley, economic importance uncertain.

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Nurse cell system: A syncytium.

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Barley and weed hosts, mainly in the Asteraceae

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


Soil temperatures in the high valleys of Mexico range from 16-20 C.  White females were observed on roots at 40 days, and cysts at 55 days, after inoculation with J2.

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Managenment of weed hosts.

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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Subbotin, S.A., Mundo-Ocampo, M., Baldwin, J.G. 2010. Systematics of Cyst Nematodes (Nematode: Heteroderinae). Nematology Monographs and Perspectives Volume 8A , D.J. Hunt and R.N. Perry (eds) Brill, Leiden, The Netherlands 351p

Tovar-Soto, A., I. Cid del Prado-Vera, J. M. Nicol, K. Evans, J. S. Sandoval-Islas, and A. Martinez-Garza. 2003. Cactodera galinsogae n. sp. (Nemata: Heteroderidae) on barley of the High Valleys of Mexico. Nematropica 33:41-54.

Tovar-Soto, A., I. C. Del Prado-Vera, M. Gutierrez-Aguilar, J. Garcia-Zuniga, and K. Evans. 2008. Postembryonic development of Cactodera galinsogae (Tylenchida: Heteroderinae) in barley (Hordeum vulgare L.) and the role of weeds as hosts. Nematropica 38:145-153.



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Copyright 1999 by Howard Ferris.
Revised: October 07, 2023.