Interaction of the Culex quinquefasciatus egg raft pheromone with a natural chemical associated with oviposition sites.
In laboratory bioassays, gravid Culex quinquefasciatus mosquitoes were strongly attracted and or stimulated to oviposit by a habitat-derived chemical cue, 3-methylindole, at several concentrations ranging from 0.01 to 1 microgram/liter in water. At concentrations above 10 micrograms/liter, 3-methylindole became repellent or deterrent. Responses to the known egg raft pheromone, 6-acetoxy-5-hexadecanolide, were much weaker and were relatively constant above a threshold dosage of about 0.1 microgram. Responses to blends of a fixed amount of the pheromone with variable doses of 3-methylindole were shown to be additive rather than synergistic.
Millar
J G
JG
Department of Entomology, University of California, Riverside 92521.
Chaney
J D
JD
Beehler
J W
JW
Mulla
M S
MS
D000818:Animals; D003465:Culex / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D004347:Drug Interactions; D017753:Ecosystem; D005260:Female; D010058:Oviposition / Q000187:drug effects*; D010063:Ovum / Q000187:drug effects; D010675:Pheromones / Q000494:pharmacology*; D011753:Pyrones / Q000494:pharmacology*; D012862:Skatole / Q000494:pharmacology*
D010675:Pheromones; D011753:Pyrones; C091336:6-acetoxy-5-hexadecanolide; D012862:Skatole