Journal of Chemical Ecology (2000) 26, 2591-2601
Monika Hilker, Verena Bläske, Carsten Kobs and Cornelia Dippel (2000)
Kairomonal effects of sawfly sex pheromones on egg parasitoids
Journal of Chemical Ecology 26 (11), 2591-2601
Abstract: The response of the two eulophid egg parasitoid species Chrysonotomyia ruforum and Dipriocampe diprioni to sex pheromones of their sawfly hosts Diprion pini and Neodiprion sertifer was studied in olfactometer bioassays. Females of C. ruforum were arrested when exposed to odor of the tested major sex pheromone components of Diprion pini [acetate and propionate of (2S,3R,7R)-3,7-dimethyl-2-tridecanol] or Neodiprion sertifer [(2S,3S,7S)-3,7-dimethyl-2-pentadecyl acetate]. This behavioral response of C. ruforum was observed whether (1) parasitoid females had oviposition experience with D. pini eggs or not, (2) parasitoid females emerged from D. pini eggs of a French population or from N. sertifer eggs of a Finnish population, and (3) the tested sex pheromone concentration was low (1 ng/µl hexane) or high (100 ng/µl hexane). However, C. ruforum did not behaviorally respond to a stereoisomer of the major sex pheromone component of N. sertifer, which is known to act as a sex pheromone antagonist [antagonist = (2S,3R,7R)-3,7-dimethyl-2-pentadecyl acetate]. Thus, C. ruforum responded stereospecifically to the S,S,S configured pheromone of N. sertifer, but not to the S,R,R configuration. Females of the parasitoid D. diprioni were also arrested by the tested major sex pheromone components of the host D. pini. The kairomonal effects of diprionid host sex pheromones on these egg parasitoids are compared to known responses of egg parasitoids to lepidopteran sex pheromones.
(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): Monika Hilker
Research topic(s) for pests/diseases/weeds:
pheromones/attractants/traps
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Neodiprion sertifer | ||||
| Diprion pini | ||||
| Closterocerus ruforum (parasitoid) | Neodiprion sertifer | |||
| Closterocerus ruforum (parasitoid) | Diprion pini | |||
| Dipriocampe diprioni (parasitoid) | Diprion pini |
