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Plants used for the study.
| Plant botanical name | Family | Local name |
|---|---|---|
| Asparagus falcatus | Liliaceae | Hathawariya |
| Asteracantha longifolia | Acanthaceae | Neeramulliya |
| Coriandrum sativum | Umbelliferae | Koththamalli |
| Epaltes divaricata | Compositae | Heen mudamahana |
| Vetiveria zizanioides | Graminae | Sewendara |
