| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Zingiber officinale | Tuber | -- | -- | * | |
| Centella asiatica | Plant | -- | -- | =ICMR(Indian Council of Medical Research).1976.Medicinal Plants of India.Vol.1.Indian Council of Med. Res.Cambridge Printing Works, New Delhi.487 pp;ICMR.1987.Medicinal Plants of India.Vol.2.Indian Council of Med. Res.Cambr. Printing Works,New Delhi.600pp | |
| Achillea millefolium | Plant | -- | -- | Tunon, H., Thorsell, W., and Bohlin, L. 1993. Mosquito Repelling Activity of Compounds Occurring in Achillea millefolium L. (Asteraceae). Economic Botany 48(2): 111-120, 1994. | |
| Urtica dioica | Leaf | -- | -- | Jim Duke's personal files. | |
| Canavalia ensiformis | Seed | -- | -- | * | |
| Artemisia dracunculus | Leaf | -- | -- | * | |
| Panax ginseng | Root | -- | -- | * | |
| Panax ginseng | Leaf | -- | -- | * | |
| Harpagophytum procumbens | Root | -- | -- | * | |
| Tilia sp. | Fruit | -- | -- | * |