Table 4. Knock down times (min), Resistant ratio, and mortality rates (after 24 h) of Aedes albopictus after exposure to insecticides at the diagnostic doses (WHO tube test).
DDT (4%) | Deltamethrin (0.05%) | Phenothrin (1.5) | Prallethrin (1%) | Malathion (0.8%) | |||||||||||
Population | KDT50 (95% CI) | RR50 | Mortality (%) | KDT50 (95% CI) | RR50 | Mortality (%) | KDT50 (95% CI) | RR50 | Mortality (%) | KDT50 (95% CI) | RR50 | Mortality (%) | KDT50 (95% CI) | RR50 | Mortality (%) |
ATM95 | 33 (30–35) | 1 | 100 | 6 (6.3–6.6) | 1 | 100 | 8.4 (8.2–8.7) | 1 | 100 | 1.37 (1.29–1.44) | 1 | 100 | 23 (22.2–23.8) | 1 | 100 |
FL1 | 53 (51–56) | 1.61 | 72 | 9.8 (9.6–10.1) | 1.57 | 100 | 7.9 (7.6–8.3) | 0.94 | 100 | 1.61 (1.46–1.82) | 1.18 | 100 | 49.6 (47.4–52.3) | 2.16 | 86 |
FL2 | 62 (59–68) | 1.88 | 54 | 10.7 (10.4–10.9) | 1.70 | 99 | 7.7 (7.4–8) | 0.91 | 100 | 1.35 (1.28–1.43) | 0.99 | 99 | 53.5 (50.5–57.6) | 2.34 | 80 |
NJMon1 | 42 (41–44) | 1.28 | 100 | 8.4 (7.9–8.9) | 1.34 | 100 | 6.6 (6.4–6.8) | 0.79 | 100 | 0.81 (0.73–0.88) | 0.59 | 99 | 27.9 (26.9–28.8) | 1.22 | 100 |
NJMon2 | 42 (40–45) | 1.28 | 87 | 11.2 (10.9–11.5) | 1.78 | 100 | 7.6 (7.3–7.9) | 0.9 | 100 | 1.37 (1.25–1.5) | 1.04 | 100 | 36.3 (35.1–37.5) | 1.59 | 95 |
NJMer1 | 28 (24–30) | 0.83 | 95 | 10.2 (9.4–11) | 1.62 | 100 | 7.1 (6.9–7.4) | 0.85 | 100 | 1.48 (1.29–1.78) | 1.08 | 100 | 34.3 (33.5–35.2) | 1.5 | 96 |
NJMer2 | 47 (45–49) | 1.4 | 100 | 7.1 (6.8–7.4) | 1.13 | 100 | 6.6 (5.9–7.2) | 0.78 | 100 | 1.12 (1–1.21) | 0.83 | 100 | 26.4 (25.5–27.3) | 1.15 | 99 |
NJBer | 27 (26–27.3) | 0.8 | 99 | 10.3 (9.9–10.8) | 1.65 | 100 | 8.3 (7.9–8.8) | 0.98 | 100 | 1.13 (0.99–1.25) | 0.83 | 100 | 38.3 (36–40.4) | 1.67 | 93 |
ATM95: susceptible reference strain. KDT50: Knock down time where 50% of the mosquitoes are knocked down (min); RR50: Resistant Ratio = KDT50 ATM95/KDT50 field population. Significant RRs are shown in bold.