Group of treatment | Time of observation | ||
24 hours | 48 hours | 72 hours | |
Positive control | 35% | 58% | 60% |
Negative control | 5% | 8% | 9% |
200 µg/ml | 18% | 22% | 22% |
400 µg/ml | 22% | 24% | 27% |
600 µg/ml | 30% | 35% | 37% |