Figure 1
Phosphine concentrations (ppm) required to achieve 99% (LC99) and 99_9968% (LC99_9968 Probit 9) mortalities of adult Megaselia scalaris with 6 h exposure_
| Temperature | Number of insects | Slope ± SE | Intercept ± SE | LC99 (95% Fiducial limits), ppm | LC99.9968 (95% Fiducial limits), ppm |
|---|---|---|---|---|---|
| 15 °C | 1350 | 4.394 ± 0.334 | −8.319 ± 0.658 | 264.6 (223.9 – 332.0) | 636.2 (478.5 – 942.9) |
| 20 °C | 1260 | 4.081 ± 0.383 | −7.234 ± 0.703 | 22.0 (176.4 – 305.2) | 565.9 (388.5 – 996.6) |
| 25 °C | 1440 | 4.208 ± 0.269 | −6.298 ± 0.430 | 112.0 (96.9 – 135.0) | 280.1 (218.3 – 387.3) |
Phosphine susceptibility of developmental stages of Megaselia scalaris (200 ppm, 25 °C)_
| Stage | Number of insects | Mortality (%) | ||||
|---|---|---|---|---|---|---|
| Exposure time (h) | ||||||
| 0 (control) | 2 | 4 | 8 | 24 | ||
| Egg | 150 | 2.0 | 4.0 | 18.0 | 84.7 | 100 |
| Larva | 90 | 0.0 | 4.4 | 20.0 | 71.1 | 100 |
| Pupa | 90 | 4.4 | 1.1 | 7.8 | 13.3 | 15.6 |
| Adult | 90 | 0.0 | 75.6 | 100 | 100 | 100 |