Autor(es): Sivakumar, R.; Jebanesan, A.; Govindarajan, M.; Rajasekar, P.

Resumo: To investigate the larvicidal and repellent efficacy of tetradecanoic acid against Aedes aegypti (Ae aegypyi) L. and Culex quinquefasciatus (Cx. quinquefasciatus) Say (Diptera: Culicidae). Methods: Larvicidal efficacy of tetradecanoic acid was tested at various concentrations against the ealy third instar larvae of Ae. aegypti and Cx. quinquefasciatus. The repellent activity was determined against two mosquito species at tree concentrations viz., 1.0,2.5 and 5.0 ppm under the laboratory condition. Result: The tetradecanoic acid was found to be more effective against Cx. quiquefasciatus than Ae. aegypti larvae. The LC sub(50) Values were 14.08 ppm and 25.10 ppm, respctively. Tetradecanoic acid showed lesser repellency against Ae. aegypti and Cx. quiquefasciatus. The highest repellency was observed in higher concentration of 5.0 mg/cm super(2) provided 100% protection up to 60 and 90 min against Ae. aegypti and Cx. quiquefasciatus respectively. Conclusion: From the results it can be concluded the tetradecanoic acid is a potential for controlling Cx. quiquefasciatus and Ae. aegypti mosquitoes.

Palavras-Chave: Pesticides; Repellents; Pest control; Toxicity tests; Mortality causes; Trees; Repellency; Culex quinquefasciatus; Aedes aegypti; Culicidae; Diptera

Imprenta: Asian Pacific Journal of Tropical Medicine, v. 4, n. 9, p. 706-710, 2011.

Descritores: Aedes aegypti - Repellent

Data de publicação: 2011

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