Efficacy and sublethal effects of mosquito mats on Aedes aegypti and Culex quinquefasciatus (Diptera: Culicidae).

Mosquito mats with active ingredient d-allethrin (36 mg/mat) and prallethrin (15 mg/mat) were tested in the laboratory against Aedes aegypti (L.) and Culex quinquefasciatus (Say) using test method of the Standard and Industrial Research Institute of Malaysia. Results indicated that KT50 values for d-allethrin against Ae. aegypti and Cx. quinquefasciatus were 1.38 min and 8.36 min, respectively. There were significant differences between Ae. aegypti and Cx. quinquefasciatus (t test, 95%, p<0.05) which were tested with d-allethrin and prallethrin. Ae. aegypti that were tested with d-allethrin and prallethrin showed that percentage mortality were 63.33% and 90.00%, respectively. Longevity of Ae. aegypti and Cx. quinquefasciatus species decreased more than 80% and 45%, respectively, after exposure to mosquito mats containing either d-allethrin or prallethrin. The percentage of blood-engorgement activity for Ae. aegypti and Cx. quinquefasciatus was reduced to less than 70% and 25% respectively after a 20 min exposure to mat containing either one of active ingredients. The number of eggs oviposited by the treated females, egg hatchability, pupation rate and adult emergence rate were not affected if the mosquitoes were still able to blood-engorge.