Plant Parasitic



Webmaster: Daniel Snyder

Last Edited: May 30, 2002


Genus Helicotylenchus

Spiral Nematodes

Most important species: H. dihystera and H. multicinctus

Their common name comes from the shape of their body after death, a spiral.

  • most cosmopolitan nematode in the US (ubiquitous distribution)
  • achieve high numbers in soil, but rarely cause extensive damage
  • climatic range is temperate to tropical
  • main crop host is banana
  • average life cycle is 30-45 days
  • males are rare suggesting parthenogenesis
  • typically feed on only a few cell around head 4-6 cell layers deep into cortex

H. multicinctus causes serious damage on bannana roots and corms in the tropics.

Morphological species comparisons.