Table 2: Lethal concentrations of hexane extract of the leaf and stem of Achyranthes aspera against early fourth instars of Aedes aegypti at different mortality levels calculated by regression analysis using computerized statistical program SPSS (Version 19.0).
Extract |
Lethal Concentration (ppm) |
LC_{30} |
LC_{50} |
LC_{90} |
R.C. |
χ^{2} |
S.E. |
df |
Hexane Extract of Leaf |
67 (56.45-74.56) |
83 (73.55-91.86) |
140 (120.89-177.65) |
5.6 |
6.7 |
0.8 |
6 |
Hexane Extract of Stem |
55 (21.80-70.98) |
68 (42.34-92.72) |
115 (86.68-440.53) |
5.6 |
15.9 |
0.9 |
5 |
LC_{30} - Lethal Concentration that kills 30% of the exposed larvae, LC_{50} - Lethal Concentration that kills 50% of the exposed larvae, LC_{90} - Lethal Concentration that kills 90% of the exposed larvae; Values are mean of three replicates; Values in parentheses indicate the lower and upper 95% fiducial limits; R.C. = Regression Coefficient, χ^{2} = Chi-square, S.E. = Standard Error, df = degree of freedom, Test samples were transformed into log covariant (log10), p > 0.05, level of significance is greater than 0.05, no heterogeneity factor is used in the calculation of confidence limits.