Table 6.
Mortality (%) of G. rostochiensis J2 after 4 to 24 h exposures to 125–1000 µg mL−1 solutions of the saponin extract from five different Medicago species (means ± SE).
| Concentration | Exposure Time (hours) | |||
|---|---|---|---|---|
| (µg mL−1) | 4 | 8 | 16 | 24 |
| M. heyniana | ||||
| 125 | 22.7 ± 1.7 | 39.5 ± 1.3 | 42.7 ± 0.6 | 64.5 ± 1.4 |
| 250 | 29.6 ± 3.2 | 43.0 ± 2.3 | 47.9 ± 1.0 | 72.1 ± 3.0 |
| 500 | 37.7 ± 6.0 | 48.5 ± 4.0 | 67.8 ± 4.0 | 80.1 ± 1.7 |
| 1000 | 38.9 ± 5.6 | 55.8 ± 4.6 | 80.8 ± 3.9 | 88.2 ± 1.4 |
| LC50 | 2648 | 546 | 212 | 52 |
| M. hybrida | ||||
| 125 | 25.8 ± 1.5 | 29.0 ± 1.3 | 62.9 ± 4.4 | 76.3 ± 4.5 |
| 250 | 28.7 ± 2.9 | 32.2 ± 2.6 | 64.0 ± 4.0 | 77.0 ± 1.2 |
| 500 | 33.6 ± 1.3 | 37.5 ± 1.0 | 65.0 ± 5.6 | 87.0 ± 4.0 |
| 1000 | 44.7 ± 4.0 | 47.9 ± 3.8 | 82.6 ± 4.6 | 87.8 ± 1.5 |
| LC50 | 2191 | 1538 | 54 | 9 |
| M. lupulina | ||||
| 125 | 23.1 ± 0.6 | 27.4 ± 2.2 | 73.0 ± 4.8 | 75.5 ± 4.7 |
| 250 | 29.3 ± 1.9 | 30.0 ± 1.5 | 79.3 ± 4.4 | 79.8 ± 1.8 |
| 500 | 33.4 ± 3.7 | 41.9 ± 2.7 | 85.6 ± 4.8 | 85.4 ± 3.2 |
| 1000 | 40.7 ± 2.7 | 47.8 ± 1.4 | 86.9 ± 1.8 | 86.7 ± 1.9 |
| LC50 | 2868 | 1215 | 10 | 5 |
| M. murex | ||||
| 125 | 26.6 ± 0.9 | 29.3 ± 2.8 | 34.5 ± 2.4 | 60.1 ± 4.8 |
| 250 | 31.1 ± 2.1 | 34.1 ± 1.6 | 47.1 ± 1.1 | 61.8 ± 2.7 |
| 500 | 35.4 ± 2.0 | 44.9 ± 0.7 | 57.1 ± 0.9 | 72.6 ± 2.4 |
| 1000 | 46.8 ± 1.8 | 54.5 ± 4.2 | 72.7 ± 1.1 | 84.9 ± 2.6 |
| LC50 | 1688 | 751 | 302 | 84 |
| M. truncatula | ||||
| 125 | 10.8 ± 3.4 | 24.9 ± 1.3 | 33.4 ± 1.0 | 55.8 ± 5.0 |
| 250 | 22.7 ± 2.1 | 30.0 ± 2.1 | 52.6 ± 1.6 | 62.4 ± 2.0 |
| 500 | 25.7 ± 3.3 | 43.0 ± 4.2 | 67.8 ± 0.9 | 75.1 ± 1.2 |
| 1000 | 40.8 ± 3.4 | 51.7 ± 4.1 | 76.6 ± 2.1 | 85.6 ± 2.3 |
| LC50 | 1755 | 895 | 245 | 104 |
| Oxamyl (1 mL L−1) | 34.5 ± 1.7 | 61.7 ± 1.3 | 78.3 ± 0.5 | 88.0 ± 0.7 |
| Water | 0.0 ± | 0.0 | 0.0 | 0.0 |
| LSD 0.05 | 8.3 | 6.6 | 12.9 | 8.0 |