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Evidence is reviewed for a dose-dependent reversal of response in mosquito oviposition, in which a compound that attracts or stimulates oviposition may repel or deter oviposition at a higher concentration. On the basis of a review of structure-activity relationships in compounds affecting mosquito oviposition, 5 hexanoic acid derivatives were selected for field tests with Aedes aegypti ssp. formosus in Kenya. Egg counts were increased most by methyl hexanoic acid and 5-methyl-2-hexanone, and the presence or absence of a methyl branch affected egg numbers more than the difference between a carbonyl and a carboxylic acid functional group. Hexanoic acid increased egg counts at low release rates, but decreased them at higher release rates.

Type

Journal article

Journal

Journal of the American Mosquito Control Association

Publication Date

01/01/1991

Volume

7

Pages

37 - 41