Table 1.
LC50 and EC50 determinations of X. johnsonii extract and the reference toxins Mevinphos and potassium dichromate; values indicate the mean of triplicate determinations ± standard deviation
| Treatment | LC50 value in µg/ml (95% confidence interval) at time (h) |
||
|---|---|---|---|
| 24 h | 48 h | 72 h | |
| X. johnsonii extract | 361.0 ± 41.8 | 402.1 ± 15.7 | 199.8 ± 60.5 |
| X. johnsonii extract* | 220.1 ± 8.6* | 250.0 ± 9.8* | 187.5 ± 19.8* |
| Mevinphos | 1346.2 ± 80.1 | 523.3 ± 39.0 | 114 ± 12.8 |
| Potassium dichromate | 87.1 ± 5.2 | 81.9 ± 3.8 | 79.6 ± 4.6 |
*
Indicates EC50 determinations (where effect is defined as lack of controlled forward movement)