Table 2.
Toxicity of imidacloprid to resistant (ImR) and susceptible (SS) strains of Aphis gossypii.
| Strains | n a | Slope ± SE b | LC50 mgL−1 (95% CL) c | χ2 | df d | p-Value | RR e |
|---|---|---|---|---|---|---|---|
| SS | 360 | 1.961 ± 0.229 | 0.443 (0.359–0.540) | 9.467 | 13 | 0.737 | - |
| ImR | 360 | 2.398 ± 0.241 | 12.312 (10.393–14.491) | 7.433 | 13 | 0.878 | 27.79 |
a Number of insects; b Standard error; c 95% confidence intervals; d Chi-square value (χ2) and degrees of freedom (df) calculated by PoloPlus 2.0; e Resistance ratio (RR) = LC50 of the resistant strain/LC50 of the susceptible strain.