Table 1.
Resistance status of Aedes aegypti (Bora and Vauclin strains) against the five larvicides tested, Martinique*
| Larvicide | Strain | Slope (SE) | LC50 (95% CI) (µg/L) | LC95 (95% CI) (µg/L) | RR50 (95% CI) | RR95 (95% CI) |
|---|---|---|---|---|---|---|
| Temephos | Bora | 8.5 (0.4) | 3.7 (3.6–3.8) | 5.7 (5.5–6) | – | – |
| Vauclin | 2.1 (0.1) | 160 (150–180) | 1,000 (870–1,180) | 44 (40–48) | 175 (150–205) | |
| Bti | Bora | 5.4 (0.5) | 120 (110–130) | 250 (220–280) | – | – |
| Vauclin | 4.9 (0.6) | 130 (120–140) | 270 (220–330) | 1 (0.8–1.3) | 1.1 (0.7–1.7) | |
| Pyriproxyfen | Bora | 3.5 (0.2) | 0. 11 (0.10–0.11) | 0. 32 (0.29–0.36) | – | – |
| Vauclin | 3.9 (0.5) | 0.24 (0.21–0.27) | 0. 64 (0.48–0.84) | 2.2 (1.8–2.6) | 1.9 (1.3–3.0) | |
| Spinosad | Bora | 3.9 (0.6) | 350 (310–400) | 920 (640–1,340) | – | – |
| Vauclin | 4.2 (0.2) | 220 (210–230) | 550 (510–600) | 0.6 (0.5–0.8) | 0.6 (0.5–0.8) | |
| Diflubenzuron | Bora | 5.5 (1.2) | 1.7 (1.4–2.1) | 3.4 (2.4–4.9) | – | – |
| Vauclin | 6 (1.1) | 3.1. (2.8–3.5) | 5.9 (4.7–7.5) | 1.8 (1.1–3) | 1.7 (0.6–4.5) |
*
LC50 = 50% lethal concentration; CI = confidence interval; RR50 = 50% resistant ratio; Bti = Bacillus thuringiensis var israeliensis. Resistant ratios = LC50 of vauclin strain/LC95 of Bora strain; RRs in bold are significantly different from 1 (P < 0.05).