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J Am Mosq Control Assoc. 1992 Mar;8(1):11-7.

Identification of oviposition attractants for Culex quinquefasciatus from fermented Bermuda grass infusions.

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  • 1Department of Entomology, University of California, Riverside 92521.


Compounds which attract and stimulate oviposition by gravid Culex quinquefasciatus were isolated and identified from a fermented Bermuda grass infusion. The neutral portion of the ether extract of the aqueous infusion contained the stimulatory materials. Fractionation by liquid chromatography yielded an active fraction containing phenol, 4-methylphenol, 4-ethylphenol, indole and 3-methylindole. A blend of the 5 compounds strongly stimulated oviposition, as did blends of any 4 of them. Bioassays with individual compounds showed that only 3-methylindole consistently induced oviposition, in concentrations spanning 5 orders of magnitude.

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