Control of mosquito vectors of tropical infectious diseases: (1) bioefficacy of mosquito coils containing several pyrethroids and a synergist.

Abstract

The bioefficacy of mosquito coils containing several pyrethroids were tested in a 25 m3 room against Culex pipiens quinquefasciatus, Aedes aegypti and Anopheles dirus. The test results were compared with tests against Culex pipiens pallens in Japan. Based on the KT50 values (the 50% knockdown time) of mosquito coils containing dl, d-T80-allethrin, d, d-T-prallethrin and methoxymethyl-tetrafluorobenzyl tetramethyl-cyclopropanecarboxylate (K-3050) at doses of 0.05-0.5% (w/w) with or without a synergist, the pyrethroid susceptibility of the four mosquito species was as follows: Cx. p. quinquefasciatus was several times more tolerant to pyrethroids than Cx. p. pallens, Ae. aegypti was a further several times more tolerant than Cx. p. quinquefasciatus, and An. dirus was more susceptible than Cx. p. pallens (KT50 value: about half of Cx. p. pallens). The order of their susceptibilities is common for pyrethroids. Mosquito coils containing d, d-T-prallethrin and K-3050 at doses of 0.05-0.2% (w/w) and N-(2-ethylhexyl)bicycle-[2,2,1]-hept-5-ene-2,3-dicarboxyimide as a synergist at a ratio of 2 times the active ingredient were highly effective against Ae. aegypti, the most important mosquito vector for dengue fever.

• Authors: Yoshio Katsuda, Somjai Leemingsawat, Supatra Thongrungkiat, Narumon Komalamisara, Tsutomu Kanzaki, Tomoe Watanabe, Tomoko Kahara
• Journal: The Southeast Asian journal of tropical medicine and public health (Southeast Asian J Trop Med Public Health) Vol. 39 Issue 1 Pg. 48-54 (Jan 2008) ISSN: 0125-1562 [Print] Thailand
• PMID: 18567443 (Publication Type: Comparative Study, Journal Article)

Chemical References

• Pyrethrins

Topics

• Animals
• Communicable Diseases (parasitology)
• Culicidae (drug effects)
• Humans
• Japan
• Mosquito Control (methods)
• Pyrethrins (pharmacology)
• Thailand
• Tropical Climate