Table 3.
Activity and impact on Tetranychus urticae oviposition of shikonin derivatives from root of Onosma visianii.
| Compound No. | Mortality a (%) | Inhibition of Oviposition a (%) | ||||
|---|---|---|---|---|---|---|
| Adults | Nymphs | |||||
| 2nd Day | 5th Day | 2nd Day | 5th Day | 2nd Day | 5th Day | |
| 1 | 48.1 ± 5.3 | 100.0 ± 0.0 | 28.2 ± 5.1 | 100.0 ± 0.0 | 78.7 ± 8.7 | 94.5 ± 8.6 |
| 2 | 84.1±6.9 | 100.0 ± 0.0 | 84.6 ± 5.8 | 100.0 ± 0.0 | 90.3 ± 3.3 | 97.4 ± 3.5 |
| 3 | 80.1 ± 7.2 | 91.7 ± 5.8 | 58.9 ± 7.4 | 74.3 ± 5.8 | 81.8 ± 5.8 | 94.8 ± 7.1 |
| 4 | 32.1 ± 3.9 | 62.5 ± 5.2 | 58.8 ± 4.6 | 67.9 ± 4.8 | 25.4 ± 5.4 | 52.8 ± 4.9 |
| 5 | 20.1 ± 3.5 | 41.7 ± 2.5 | 57.9 ± 6.2 | 80.7 ± 5.3 | 0.8 ± 0.3 | 33.1 ± 9.1 |
| 6 | 68.2 ± 5.3 | 89.7 ± 5.2 | 69.2 ± 7.1 | 80.7 ± 5.4 | 64.8 ± 4.8 | 91.5 ± 9.5 |
| 7 | 52.3 ± 4.8 | 58.4 ± 4.3 | 84.6 ± 5.3 | 87.1 ± 7.9 | 7.2 ± 2.7 | 48.7 ± 5.7 |
| 8 | 40.3 ± 3.7 | 50.1 ± 3.9 | 67.2 ± 3.7 | 69.2 ± 4.8 | 18.1 ± 8.2 | 50.1 ± 4.2 |
| 9 | 68.2 ± 7.9 | 79.9 ± 3.8 | 74.3 ± 5.8 | 75.3 ± 5.5 | 66.1 ± 6.1 | 80.7 ± 6.9 |
| 10 | 20.6± 3.9 | 41.7 ± 3.9 | 61.5 ± 3.9 | 68.8 ± 7.2 | 9.1 ± 1.5 | 49.5 ± 7.2 |
| 11 | 44.4 ± 4.7 | 66.7 ± 4.8 | 35.8 ± 7.2 | 36.4 ± 4.6 | 34.5 ± 4.5 | 54.7 ± 8.5 |
a Mortality (% after correction by Abbott) and oviposition inhibition values are followed by standard deviations (S.D.); all compounds were at 15 μg·cm−2; the two most effective compounds are highlighted in bold.