Table 3.
Number of eggs laid by Plutella xylostella adults (mean ± SEM) in response to aqueous extracts of five different Ecuadorian Amazon plants and chlorpyrifos versus their respective water controls
| Plant extract | Treatment | Control | Mann–Whitney test statistic (W value) | P a | n b |
|---|---|---|---|---|---|
| D. costata | 1.1 ± 0.5 | 44.2 ± 6.3 | 155.0 | 0.0002*** | 10 |
| D. utilis | 5.1 ± 1.9 | 120.9 ± 15.3 | 55.0 | 0.0002*** | 10 |
| Clibadium sp. | 4.5 ± 1.0 | 43.3 ± 8.2 | 155.0 | 0.0002*** | 10 |
| X. purpuratum | 5.7 ± 1.4 | 65.5 ± 11.8 | 155.0 | 0.0002*** | 10 |
| W. solanacea | 6.4 ± 1.9 | 87.0 ± 17.1 | 55.0 | 0.0002*** | 10 |
| Chlorpyrifos | 42.0 ± 16.5 | 38.8 ± 7.8 | 26.0 | 0.8345 | 5 |
aMann–Whitney test: *P < 0.05; **P < 0.01; ***P < 0.001.
b n = number of replicates.