Table 6.
Knock-down time and mortality rates of Anopheles arabiensis exposed to Pirimiphos-methyl for a period of 60 min in dry and rainy seasons
| Age (days) | Season | Number tested | 24 h mortality | 95% CI | KDT50 | 95% CI | KDT95 | 95% CI | KDT50 ratio (RR) |
|---|---|---|---|---|---|---|---|---|---|
| 2 | Dry | – | – | – | – | – | – | – | – |
| Rain | 800 | 100 | 0 | 23.4 | 22.2–24.7 | 40.8 | 38.4–43.5 | 1.7 | |
| 3 | Dry | – | – | – | – | – | – | – | – |
| Rain | 800 | 100 | 0 | 23.3 | 22.1–24.6 | 40.6 | 38.2–43.3 | 1.7 | |
| 5 | Dry | – | – | – | – | – | – | – | – |
| Rain | 800 | 100 | 0 | 31.6 | 30.0–33.1 | 54.9 | 51.9-58.4 | 2.3 | |
| 10 | Dry | – | – | – | – | – | – | – | – |
| Rain | 800 | 100 | 0 | 36.2 | 34.6–37.9 | 63.0 | 59.7–66.9 | 2.6 | |
| Controla | Dry | – | – | – | – | – | – | – | – |
| Rain | 800 | 100 | – | 13.8 | – | 25.1 | – | – |
aControl was Anopheles gambiae aged 2 days old