Journal of Parasitology (2009) 95, 517-526
Robbie G. Rae, Jamie F. Robertson and Michael J. Wilson (2009)
Chemoattraction and host preference of the gastropod parasitic nematode Phasmarhabditis hermaphrodita
Journal of Parasitology 95 (3), 517-526
Abstract: Phasmarhabditis hermaphrodita is a parasitic nematode that has been formulated into a biological control agent for slugs. The nematode responds to slug-associated cues such as mucus and feces in order to locate potential hosts. We assessed the olfactory response of P. hermaphrodita to mucus from 9 species of slugs, 2 snails, and 2 earthworms (non-hosts). We then examined the susceptibility of each invertebrate test species to high doses of P. hermaphrodita to determine whether susceptible species are more attractive than non-susceptible species to the nematode. We also studied the numbers of infective juveniles produced in each test species, as well as infectivity. Phasmarhabditis hermaphrodita showed strong attraction to mucus from the non-susceptible slug Arion subfuscus, the snail Helix aspersa, and the highly susceptible slug Deroceras reticulatum. In reproduction experiments, P. hermaphrodita produced the highest number of infective juveniles in D. reticulatum and Deroceras panormitanum; however, there was no significant relationship with attraction. Phasmarhabditis hermaphrodita caused significant mortality in 5-11 gastropod species tested (and showed no chemotactic preference for susceptible or non-susceptible species). There was a significant positive relationship between numbers of P. hermaphrodita penetrating into non-susceptible species and chemotaxis response. These necromenic species represent ideal hosts for P. hermaphrodita in terms of providing protection against abiotic and biotic factors as well as transport to many diverse areas.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Michael J. Wilson
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Deroceras reticulatum | ||||
| Deroceras panormitanum | ||||
| Phasmarhabditis hermaphrodita (pathogen) | Deroceras reticulatum | |||
| Phasmarhabditis hermaphrodita (pathogen) | Deroceras panormitanum |
