Insecticide susceptibility of Aedes albopictus and Ae. aegypti from Brazil and the Swiss-Italian border region

Table 5 Lethal concentrations for adulticides in Aedes albopictus from the Swiss-Italian border region

Insecticide	Population	Number^a	LC₅₀ ^b Mean (95% CI)	LC₉₀ ^b Mean (95% CI)
Bendiocarb	TICINO	463	0.015 (0.014–0.017)	0.021 (0.019–0.024)
	COMO	470	0.017 (0.016–0.019)	0.027 (0.024–0.031)
DDT	TICINO	523	1.359 (1.220–1.514)	3.048 (2.557–3.635)
	COMO	470	1.126 (1.003–1.263)	2.807 (2.309–3.413)
λ-cyhalothrin	TICINO	440	0.007 (0.006–0.007)	0.012 (0.010–0.014)
	COMO	426	0.006 (0.006–0.007)	0.011 (0.010–0.013)
Malathion	TICINO	489	0.116 (0.104–0.128)	0.262 (0.222–0.310)
	COMO	486	0.120 (0.108–0.133)	0.284 (0.239–0.338)
Permethrin	TICINO	481	0.046 (0.042–0.051)	0.094 (0.081–0.110)
	COMO	430	0.051 (0.047–0.056)	0.092 (0.079–0.106)

^aTotal number of mosquitoes exposed across 5–6 concentrations
^bConcentrations are expressed as % insecticide on the filter paper in the WHO insecticide susceptibility assay to kill 50% (LC₅₀) and 90% (LC₉₀) of the mosquito population over a 24 h holding period