Table 1. Mortalities of lemongrass against D. pteronyssinus and D. farinae (Mean±SD).
| Mite | Bioassay | Concentration (%) | Mortality |
|||
| 24 h | 48 h | 72 h | 96 h | |||
| D. pteronyssinus | Topical | 3.13 | 18.6 ± 9.5 | 18.6 ± 9.5 | 22.9 ± 6.7 | 30.0 ± 7.5 |
| 6.25 | 20.9 ± 5.0 | 28.6 ± 7.5 | 29.1 ± 7.6 | 33.4 ± 9.6 | ||
| 12.50 | 29.1 ± 7.8 | 32.6 ± 9.4 | 40.6 ±13.8 | 48.6 ± 15.1 | ||
| 25.00 | 48.0 ± 6.7 | 50.1 ± 7.0 | 57.1 ± 7.3 | 73.7 ± 10.4 | ||
| 50.00 | 92.6 ±10.7 | 92.6 ± 10.7 | 92.6 ± 10.7 | 94.3 ± 9.1 | ||
| Contact | 3.13 | 72.6 ± 15.5 | 74.9 ± 14.1 | 76.3 ±13.4 | 80.9 ± 11.2 | |
| 6.25 | 84.6 ± 9.9 | 86.3 ± 10.1 | 86.3 ± 10.1 | 90.6 ± 7.3 | ||
| 12.50 | 84.3 ± 8.2 | 87.4 ± 7.5 | 88.9 ± 5.7 | 90.6 ± 5.3 | ||
| 25.00 | 90.0 ± 5.4 | 92.3 ± 5.5 | 93.4 ± 5.4 | 94.6 ± 5.1 | ||
| 50.00 | 92.3 ± 7.8 | 93.5± 7.5 | 94.0 ± 6.8 | 94.9 ± 6.7 | ||
| D. farinae | Topical | 3.13 | 11.4 ± 5.8 | 17.1 ± 8.2 | 20.0 ± 8.3 | 22.9 ± 11.4 |
| 6.25 | 12.9 ± 8.5 | 18.6 ± 9.2 | 20.0 ± 9.2 | 30.3 ± 10.5 | ||
| 12.50 | 16.6 ± 5.6 | 20.3 ± 7.4 | 28.3 ± 9.3 | 34.3 ± 9.5 | ||
| 25.00 | 17.1 ± 7.3 | 24.9 ± 7.0 | 35.1 ± 8.6 | 41.1 ± 10.5 | ||
| 50.00 | 94.3 ± 5.4 | 94.6 ± 5.6 | 95.1 ± 5.5 | 95.4 ± 5.4 | ||
| Contact | 3.13 | 65.1 ± 9.1 | 66.0 ± 8.8 | 71.1 ± 9.3 | 71.1 ± 9.3 | |
| 6.25 | 76.0 ± 14.6 | 77.2 ± 15.2 | 80.0 ± 14.3 | 80.6 ± 14.1 | ||
| 12.50 | 82.0 ± 13.9 | 82.3 ± 13.9 | 86.6 ± 10.4 | 87.1 ± 9.6 | ||
| 25.00 | 84.0 ± 14.0 | 86.2 ± 14.0 | 88.0 ± 12.7 | 88.3 ± 12.5 | ||
| 50.00 | 91.7 ± 7.8 | 91.7 ± 7.8 | 92.9 ± 7.6 | 93.1 ± 7.4 | ||