| Fractions* |
LC50 ppm (95% CL) |
LC90 ppm (95% CL) |
Slope ± SE |
χ2 (P) |
LC50 ratio (95% CL) |
| II |
6.906 (6.047-7.950) |
23.731 (18.580-33.420) |
2.391 ± 0.229 |
1.666
(0.56)a |
1.287(0.961-1.725) |
| III |
7.388 (6.329-8.776) |
32.366 (23.443-52.165) |
1.997 ± 0.215 |
1.687
(0.53)a |
1.203(0.887-1.633) |
| IV |
2.206 (1.734-2.632) |
7.811 (6.470-10.173) |
2.334 ± 0.273 |
0.571
(0.53)a |
4.030(2.898-5.603)b |
| B2'O |
2.206 (1.734-2.632) |
7.811 (6.470-10.173) |
2.334 ± 0.273 |
0.571
(0.53)a |
4.030(2.898-5.603)b |
| B2''O |
2.620 (1.031-3.952) |
11.779 (7.263-47.258) |
1.963 ± 0.232 |
2.480
(0.41)a |
3.393(2.428-4.742)b |
Negative
control** |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
|
** DMSO (0.05%) in deionized water.
a Good fit of the data to the probit model (P>0.05).
b LC50 ratio significant (P<0.05), 95% confidence interval did not comprise the value 1.0. |
Table 1: Adulticidal activity of different fractions of O. africana (fraction II, III and IV using flash column chromatography; B2'O and B2''O using prep. TLC) against Anopheles arbiensis adults after 24 hr exposure period on impregnated papers in WHO test tubes (n=45 in each test).
* The codes used for the fractions. |
