Table 2.
Bioassay results for Aedes albopictus, including samples collected in Madang and Port Moresby. Values are given as proportions and 95% CI [35]
| Insecticide, location | Mean knockdown after 60 min (95% CI) | Mean mortality after 24 h (95% CI) |
|---|---|---|
| 0.05% deltamethrin, Madang (n = 273) | 0.98 (0.96–0.99) | 1.00 (0.98–1.00) |
| 0.05% deltamethrin, Port Moresby (n = 11)a | 0.92 (0.60–1.00) | 0.92 (0.60–1.00) |
| 0.05% lambda-cyhalothrin, Madang (n = 135) | 1.00 (0.97–1.00) | 1.00 (0.97–1.00) |
| 0.1% bendiocarb, Madang (n = 123) | 1.00 (0.96–1.00) | 1.00 (0.96–1.00) |
| 4% DDT, Madang (n = 145)b | 0.62 (0.54–0.70) | 0.79 (0.72–0.85) |
| 5% malathion, Madang (n = 81) | 0.99 (0.93–1.00) | 0.96 (0.89–0.99) |
aThe number of mosquitoes tested against deltamethrin in Port Moresby (n = 11) is too low to be statistically robust and these results are included for reason of completeness
bDDT is known to act more slowly [19] in anophelines, even in susceptible populations. Therefore, we also determined 48 h mortality for most (n = 129) Ae. albopictus mosquitoes exposed to DDT. Mortality after 48 h was unchanged at 0.77 (0.69–0.83)
Abbreviations: n, number of mosquitoes; CI, confidence interval