Table 4.
Sensitivity of the larvae 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) | Larvae | BJ | 1,194 | 0.0594 (0.0402−0.0880) ab | 4.71 | 0.855 (0.117) |
| SD | 2,490 | 0.048 (0.0412−0.0559) a | 3.81 | 1.26 (0.0696) | ||
| HN | 1,554 | 0.0807 (0.0573−0.115) b | 6.40 | 0.811 (0.0978) | ||
| HB | 1,556 | 0.0590 (0.0491−0.0710) ab | 4.68 | 1.53 (0.121) | ||
| Chlorantraniliprole (anthranilic diamide) | Larvae | BJ | 2,010 | 3.10 (2.85−3.37) b | 4.17 | 2.32 (0.156) |
| SD | 2,248 | 2.28 (2.01−2.58) a | 3.07 | 2.45 (0.137) | ||
| HN | 1,709 | 3.57 (3.01−4.25) b | 4.80 | 2.08 (0.168) | ||
| HB | 1,487 | 3.96 (3.33−4.75) b | 5.33 | 1.76 (0.164) | ||
| Buprofezin (IGR) | Larvae | BJ | 1,038 | 11.9 (9.82−14.4) a | 2.27 | 0.76 (0.0847) |
| SD | 1,126 | 8.56(7.39−9.93) a | 1.63 | 1.40 (0.129) | ||
| HN | 1,502 | 27.0 (25.9−28.2) b | 5.15 | 2.14 (0.142) | ||
| HB | 1,498 | 30.8 (23.8−40.0) b | 5.88 | 1.70 (0.122) | ||
| Pyriproxyfen (IGR) | Larvae | BJ | 1,629 | 2.96 (2.55−3.42) a | 1.79 | 2.46 (0.197) |
| SD | 1,704 | 3.67 (3.28−4.10) a | 2.22 | 2.28 (0.203) | ||
| HN | 1,785 | 7.07 (6.19−8.06) b | 4.28 | 2.23 (0.137) | ||
| HB | 1,655 | 8.16 (6.90−9.63) b | 4.95 | 2.28 (0.148) | ||
| Thiamethoxam (neonicotinoid) | Larvae | BJ | 1,376 | 9.80 (7.09−13.4) a | 2.09 | 1.71 (0.121) |
| SD | 1,558 | 8.02 (5.87−10.9) a | 1.71 | 1.81 (0.122) | ||
| HN | 1,806 | 35.6 (30.1−42.0) b | 7.61 | 2.43 (0.142) | ||
| HB | 1,384 | 54.1 (44.1−66.4) c | 11.6 | 1.98 (0.169) |
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.