Table 4.
Insect mortality, regression equation and LD50 value of D. viscosa aerial part extracts 24 h after topical application.
| D. viscosa extract (μg/adult) | Mortality rate (%)1 (mean ± SE) | Regression equation | X² | LD50 (μg/adult) |
|---|---|---|---|---|
| n-hexane | ||||
| 75.0 | 80.0 ± 11.6 a | y = 4.62 × −7.97 | 2.27 | 53.20 |
| 37.5 | 15.0 ± 9.6 b | |||
| 18.8 | 5.0 ± 5.0 b | |||
| 9.4 | 0.0 ± 0.0 b | |||
| 4.7 | 0.0 ± 0.0 b | |||
| 0.0 | 0.0 ± 0.0 b | |||
| F | 23.920 | |||
| d.f. | 5 | |||
| P | <0.01 | |||
| methanol | ||||
| 75.0 | 25.0 ± 12.6 a | NA | NA | NA |
| 37.5 | 10.0 ± 5.8 ab | |||
| 18.8 | 5 ± 5.0 b | |||
| 9.4 | 0.0 ± 0.0 b | |||
| 4.7 | 0.0 ± 0.0 b | |||
| 0.0 | 0.0 ± 0.0 b | |||
| F | 2.677 | |||
| d.f. | 5 | |||
| P | 0.06 | |||
| water | ||||
| 0.0–75.0 | 0 ± 0.0 | NA | NA | NA |
1Data were submitted to ANOVA followed by Tukey HSD test. For each extract, values followed by the same letters are not significantly different at P = 0.05. The mean adult weight was 1.983 ± 0.018 mg. NA, not applicable.