Cactodera weissi

Cactodera weissi	Contents	Rev 10/07/2023
Knotweed Cyst Nematode	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Cactodera Menu	Economic Importance	Damage
	Distribution	Management
Return to Heteroderidae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

    Tylenchida
       Tylenchina
        Tylenchoidea
         Heteroderidae
          Punctoderinae

           Cactodera weissi (Steiner, 1949) Krall & Krall, 1978

    Synonyms:
      None.

Morphology and Anatomy:

Female: Cyst stage present.

Cyst of Cactodera weissi

Body globose, with short neck and terminal cone.
Cuticle thick, with superficial irregular transverse ridges interrupted by short markings, more or less longitudinal; D-layer present (absent in C. betulae).
Vulva terminal surrounded by a circumfenestration; vulval slit less than 20 µm long; no underbridge; no bullae; anus without fenestration.
All eggs retained in body (no egg-mass).
Eggs without punctations or tubercles.

Male:

Body twisted. 90 degrees
Stylet less than 30 µm long.
Lateral field with four lines.
Spicules greater than 30 µm long, slightly curved, pointed at distal extremity, obliquely directed.
No cloacal tubus.
Tail short, hemispherical.

Second-stage juveniles:

Stylet less than 30 µm long.
Lateral field with four lines.
Esophageal glands filling body cavity.
Tail conical, pointed with hyaline terminal half.
Phasmids punctiform.

Luc, Maggenti & Fortuner (1988); Subbotin et al., 2020

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

Distribution:

Reported fromk several areas in USA and Canada; for example, on weed species in Michigan, USA.

Hosts:

Knotweed (Polygonum pennsylvanicum and P. persicaria)

For an extensive host range list for this species, click

Life Cycle:

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click	If species level data are not available, click for genus level parameters

Management:

Host Plant Resistance, Non-hosts and Crop Rotation alternatives:

For plants reported to have some level of resistance to this species, click

References:

Baldwin, J.G., Mundo-Ocampo, M., McClure, M. 1997. Cactodera salina n.sp. From the estuary plant, Salicornia bigelovii, in Sonora, Mexico. J. Nematology 29:465-473.

Evans, K., Rowe, J.A. 1998. Distribution and economic importance. In S.B. Sharma (ed). The Cyst Nematodes. Kluwer

Luc, Maggenti & Fortuner, Rev. Nematol. 11(2):159-176 (1988).

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