Table 3.
Sensitivity of the eggs of four field strains of B. tabaci strains to selected insecticides
| Insecticide | Strain | n a | LC 50 (95% FL) (mg/liter) | RR b | Slope (SE) | |
|---|---|---|---|---|---|---|
| Cyantraniliprole (anthranilic diamide) | Egg | BJ | 1,449 | 0.231 (0.0857−0.431) a | 1.74 | 0.845 (0.0881) |
| SD | 1,902 | 0.525 (0.282−1.13) ab | 3.95 | 0.558 (0.0707) | ||
| HN | 2,125 | 0.763 (0.492−1.30) b | 5.74 | 0.669 (0.0653) | ||
| HB | 1,759 | 1.15 (0.851−1.67) b | 8.65 | 0.964 (0.0924) | ||
| Pyriproxyfen (IGR) | Egg | BJ | 1,423 | 0.330 (0.285−0.385) a | 1.47 | 1.39 (0.160) |
| SD | 1,005 | 0.282 (0.196−0.383) a | 1.25 | 1.26 (0.133) | ||
| HN | 1,625 | 0.792 (0.655−0.953) b | 3.52 | 2.22 (0.173) | ||
| HB | 1,967 | 0.919 (0.805−1.04) b | 4.08 | 2.18 (0.139) | ||
| Acetamiprid (neonicotinoid) | Egg | BJ | 1,319 | 15.1 (12.0−19.0) a | 1.69 | 2.00 (0.164) |
| SD | 1,393 | 10.9 (8.73−13.5) a | 1.22 | 1.97 (0.144) | ||
| HN | 1,525 | 41.9 (38.1−46.1) b | 4.68 | 1.78 (0.157) | ||
| HB | 1,685 | 41.8 (35.2−49.6) b | 4.67 | 2.09 (0.183) |
a n , number of eggs used in bioassay, including controls.
b RR, resistance ratio = (the LC 50 of field population)/(the LC 50 of Lab-Q) corresponding to the same developmental stage.