Table 2.
Time for mortality to drop below 80% and 50% for laboratory, simple hut, and experimental hut bioassays
| Substrate | Insecticide | Estimated time to 80% mortality | Estimated time to 50% mortality | ||
|---|---|---|---|---|---|
| Time (months) | 95% CI | Time (months) | 95% CI | ||
| Laboratory bioassays | |||||
| Mud | Delta SC-PE 50 | 13.4 | (12.8 to 14.3) | 15.8 | (15.0 to 17.1) |
| Delta SC-PE 25 | 8.3 | (7.5 to 9.1) | 11.6 | (10.9 to 12.4) | |
| Delta WG 25 | 8.1 | (7.6 to 8.7) | 10.9 | (10.4 to 11.4) | |
| DDT WP 2000 | 5.2 | (4.4 to 5.9) | 8.4 | (7.8 to 9.0) | |
| Concrete | Delta SC-PE 50 | † | † | † | † |
| Delta SC-PE 25 | 15.5 | (14.5 to 17.3) | † | † | |
| Delta WG 25 | 14.9 | (13.8 to 16.9) | † | † | |
| DDT WP 2000 | 10.1 | (8.9 to 11.4) | 14.6 | (13.3 to 16.6) | |
| Simple hut bioassays | |||||
| Mud | Delta SC-PE 50 | † | † | 4.6 | (2.4 to 6.0) |
| Delta SC-PE 25 | † | † | 6.0 | (5.0 to 6.9) | |
| Delta WG 25 | † | † | 2.6 | (0.3 to 4.1) | |
| Concrete | Delta SC-PE 50 | 11.2 | (10.4 to 12.1) | 14.7 | (13.7 to 16.0) |
| Delta SC-PE 25 | 8.0 | (6.7 to 9.0) | 12.4 | (11.3 to 13.9) | |
| Delta WG 25 | † | † | 2.1 | (†to 3.6) | |
| Experimental hut bioassays | |||||
| Mud | Delta SC-PE 25 | 2.8 | (0.2 to 4.6) | 8.0 | (6.7 to 9.2) |
| Delta WG 25 | † | † | 0.5 | (†to 3.0) | |
| DDT WP 2000 | † | † | 3.3 | (1.1 to 5.0) | |
| Concrete | Delta SC-PE 25 | 11.4 | (9.2 to 16.7) | † | † |
| Delta WG 25 | 5.8 | (0.8 to 8.2) | † | † | |
| DDT WP 2000 | 7.0 | (4.3 to 8.9) | 12.0 | (10.4 to 15.1) | |
Notes : † indicates that statistical models produced estimates outside the study period.