Table 2. Mortality of unselected and selected offspring to Temprid SC and Transport GHP using an exposure time estimated to kill 80% of the initial population prior to selection.
| Insecticide | Strain | Treatment | % Mortality (±s.e.m.)a | nb | G2 (df; p-value)c |
|---|---|---|---|---|---|
| Temprid SC | CIN1 | Unselected | 69.2 (±9.2) | 120 | 146 (1, <0.001)* |
| CIN1 | Selected | 1.6 (±0.0) | 120 | ||
| LA1 | Unselected | 96.7 (±1.7) | 120 | 101 (1, <0.001)* | |
| LA1 | Selected | 40.9 (±4.2) | 120 | ||
| NY1 | Unselected | 70.0 (±5.0) | 120 | 71 (1; <0.001)* | |
| NY1 | Selected | 18.3 (±10.0) | 120 | ||
| Transport GHP | CIN1 | Unselected | 85.0 (±6.7) | 120 | 169 (1; 0.001)* |
| CIN1 | Selected | 10.2 (±1.9) | 120 | ||
| LA1 | Unselected | 100.0 (±0.0) | 120 | 54 (1; <0.001)* | |
| LA1 | Selected | 71.7 (±10.0) | 120 |
aAverage percent mortality and standard error calculated from each replicate of selection. Each laboratory colony was selected twice.
bTotal individuals exposed to insecticide impregnated filter papers pooled between each replicate of selection.
cThe dependence of mortality on selection was explored using a log-linear analysis with treatment (selected vs. unselected), mortality (dead vs. alive), and replicate as three dimensions of a contingency table39. Individual replicates were analyzed using χ2 analysis [Analytical Software. Statistix 8.0 for Windows. (Tallahassee, FL, 2003)] (Figs. 2 and 3).
*P ≤ 0.05.