A synthetic mixture of an oviposition-stimulating kairomone for the yellow fever mosquito, Aedes aegypti, comprising of 83% tetradecanoic acid, 16% nonanoic acid and 1% tetradecanoic acid methyl ester (NTT, in short) was tested in a dengue endemic area in Recife, Brazil. Gravid female mosquitoes confined to a cage under semi-field conditions deposited significantly higher numbers of eggs in traps baited with NTT at doses ranging from 0.6 to 600 ng/µl than in control (water) traps. When tested in homes, egg-laying in traps baited with 60 ng NTT/µl (final concentration in trap, ≈3.33 ng/ml) and in control traps was not significantly different, but egg deposited in traps with lower dosage (6 ng NTT/µl; final concentration in trap, µ0.33 ng/ml) was significantly higher than in control traps. In subsequent trials, the numbers of eggs laid in traps baited with 0.6 ng NNT/µl (final concentration in trap, ≈0.033 ng/ml) were not significantly different from the numbers deposited in trap loaded with 6 ng NTT/µl. Egg-laying was significantly higher in these treatments than in control traps.
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1 June 2010
Evaluation of an Oviposition-Stimulating Kairomone for the Yellow Fever Mosquito, Aedes aegypti, in Recife, Brazil
Rosângela M. R. Barbosa,
Andre Furtado,
Lêda Regis,
Walter S. Leal
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methyl myristate
myristic acid
nonanoic acid
ovitrap
tetradecanoic acid
tetradecanoic acid methyl ester