Table 2.
Sensitivity of eggs, larvae, and adults of two laboratory strains of B. tabaci (Lab-Q and Lab-B) to seven insecticides
| In secticide | Stage | Strain | n a | LC 50 (95% FL) (mg/liter) b | Lab-Q LC 50 /Lab-B LC 50 | DMS c | Slope (SE) |
|---|---|---|---|---|---|---|---|
| Cyantraniliprole (anthranilic diamide) | Egg | Lab-B | 2,811 | 0.000632 (0.000471−0.000847) a | 1.00 | 0.937 (0.0728) | |
| Lab-Q | 1,541 | 0.133 (0.0914−0.183) b | 210 | 10.6 | 0.891 (0.0891) | ||
| Larva | Lab-B | 1,902 | 0.00156 (0.00109−0.00221) a | 2.46 | 1.27 (0.0974) | ||
| Lab-Q | 1,719 | 0.0126 (0.0110−0.0143) b | 8.08 | 1.00 | 2.05 (0.115) | ||
| Adult | Lab-B | 574 | 5.91 (5.56−6.29) a | 9,351 | 1.978 (0.231) | ||
| Lab-Q | 502 | 96.3 (67.3−139) b | 16.3 | 7,643 | 1.20 (0.213) | ||
| Chlorantraniliprole (anthranilic diamide) | Egg | Lab-B | 1,226 | 21.1 (8.61−66.5) a | 161 | 0.892 (0.175) | |
| Lab-Q | 1,135 | 227 (161−321) b | 10.8 | 306 | 0.853 (0.159) | ||
| Larva | Lab-B | 1,175 | 0.131 (0.0762−0.205) a | 1.00 | 2.06 (0.178) | ||
| Lab-Q | 1,368 | 0.743 (0.653−0.836) b | 5.67 | 1.00 | 1.09 (0.0869) | ||
| Adult | Lab-B | 381 | 582 (240−1,450) a | 4,443 | 1.01 (0.196) | ||
| Lab-Q | 451 | 4,567 (3,656−5,708) b | 7.85 | 6,147 | 2.09 (0.314) | ||
| Avermectin (macrocyclic lactone) | Egg | Lab-B | 1,853 | 32.5(29.2−36.3) a | 367 | 1.10 (0.105) | |
| Lab-Q | 1,068 | 337(284−401) b | 10.4 | 3,370 | 0.756 (0.175) | ||
| Larva | Lab-B | 2349 | 23.5 (18.9−29.3) a | 266 | 0.807 (0.0680) | ||
| Lab-Q | 1,013 | 62.6 (34.9−116) b | 2.66 | 626 | 0.905 (0.150) | ||
| Adult | Lab-B | 453 | 0.0885(0.0618−0.127) a | 1.00 | 1.97 (0.285) | ||
| Lab-Q | 432 | 0.100 (0.0658−0.150) a | 1.13 | 1.00 | 2.20 (0.249) | ||
| Pyriproxyfen (IGR) | Egg | Lab-B | 2,094 | 0.00293 (0.00224−0.00384) a | 1.00 | 2.14 (0.133) | |
| Lab-Q | 2,508 | 0.225 (0.139−0.356) b | 76.8 | 1.00 | 0.435 (0.0429) | ||
| Larva | Lab-B | 1,338 | 0.341 (0.251−0.438) a | 116 | 0.666 (0.105) | ||
| Lab-Q | 1,266 | 1.65 (1.47−1.85) b | 4.84 | 7.33 | 0.962 (0.0928) | ||
| Adult | Lab-B | 434 | 1,461 (1,020−2,090) a | 49,8635 | 2.44 (0.262) | ||
| Lab-Q | 946 | 8,832 (7,958−9,802) b | 6.05 | 39,253 | 1.08 (0.149) | ||
| Buprofezin (IGR) | Egg | Lab-B | 2,278 | 3,634 (2,644−5,006) a | 5,040 | 0.915 (0.0930) | |
| Lab-Q | 1,326 | 30,300 (23,488−39,107) b | 8.34 | 5,782 | 1.27 (0.164) | ||
| Larva | Lab-B | 1,391 | 0.721 (0.512−0.969) a | 1.00 | 1.04 (0.111) | ||
| Lab-Q | 2,470 | 5.24 (4.00−6.84) b | 7.27 | 1.00 | 0.833 (0.0569) | ||
| Adult | Lab-B | 581 | 1,473 (1,120−1,937) a | 2,043 | 1.97 (0.177) | ||
| Lab-Q | 588 | 5,156 (4,395−6,050) b | 3.50 | 984 | 1.57 (0.223) | ||
| Acetamiprid (neonicotinoid) | Egg | Lab-B | 1,071 | 1.83 (1.38−2.37) a | 1.00 | 1.46 (0.120) | |
| Lab-Q | 942 | 8.96 (7.76−10.3) b | 4.90 | 1.00 | 1.84 (0.146) | ||
| Larva | Lab-B | 3,616 | 3.60 (2.95−4.36) a | 1.97 | 0.684 (0.0436) | ||
| Lab-Q | 2,927 | 23.9 (19.9−28.6) b | 6.64 | 2.67 | 1.10 (0.0786) | ||
| Adult | Lab-B | 351 | 3.28 (2.21−4.82) a | 1.79 | 3.88 (0.552) | ||
| Lab-Q | 387 | 22.0 (16.3−29.7) b | 6.71 | 2.46 | 1.47 (0.198) | ||
| Thiamethoxam (neonicotinoid) | Egg | Lab-B | 1,457 | 131 (90.0−192) a | 125 | 0.535 (0.0853) | |
| Lab-Q | 941 | 861 (727−1020) b | 6.57 | 184 | 1.58 (0.171) | ||
| Larva | Lab-B | 1,111 | 1.05 (0.820−1.35) a | 1.00 | 1.21 (0.125) | ||
| Lab-Q | 611 | 4.68 (1.84−11.0) b | 4.46 | 1.00 | 1.75 (0.229) | ||
| Adult | Lab-B | 382 | 17.9 (9.56−33.8) a | 17.0 | 1.12 (0.176) | ||
| Lab-Q | 715 | 91.5 (50.7−164) b | 5.11 | 19.6 | 0.767 (0.0689) |
a n , number of eggs used in the bioassay, including controls.
b For each stage treated with each insecticide, different lowercase letters indicate significant difference between Lab-B and Lab-Q strains.
c DMS = (the LC 50 of a developmental stage)/(the LC 50 of the most susceptible stage) for Lab-B (left column) or Lab-Q (right column).