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| Chemical Name | Dosage | Reference |
|---|---|---|
| ZANTHOPHYLLINE | not available | Jacobson, M., Glossary of Plant-Derived Insect Deterrents, CRC Press, Inc., Boca Raton, FL, 213 p, 1990. |
| ZIMZIN | not available | Hanke, F. J., Natural Products as a Resource for Biologically Active Compounds, Thesis, U. Cal (Santa Cruz), 1986, 252 pp |
| Plant Name | Common Name | Chemical Count | Total Parts Per Million |
|---|---|---|---|
| Warburgia ugandensis | Warburghia | 4 | 0 |
| Wasabia japonica | Japanese Horseradish; Wasabi | 2 | 0 |
| Wisteria floribunda | not available | 1 | 0 |
| Withania somnifera | Ashwagandha | 7 | 200 |
| Woodfordia floribunda | not available | 1 | 40 |
| Xylopia aethiopica | Ethiopian Pepper; Guinea Pepper; Negro Pepper; Spice Tree; Mohrenpfeffer (Ger.); Maniguete (Sp.); Pimienta de Guinea (Sp.) | 1 | 0 |
| Zanthoxylum alatum | Indian Prickly Ash; Wartara Oil Tree | 2 | 0 |
| Zanthoxylum americanum | Northern Prickly Ash | 3 | 25 |
| Zataria multiflora | not available | 1 | 0 |
| Zea mays | Corn | 14 | 9, 500 |
| Zingiber officinale | Ginger | 14 | 85, 600 |
| Zizyphus jujuba | Da-Zao; Jujube; Ta-Tsao | 3 | 45, 000 |
| Zizyphus mauritiana | not available | 1 | 0 |
| Zizyphus nummularia | not available | 1 | 90 |
| Zizyphus oenoplia | not available | 1 | 64 |
| Zizyphus rugosa | not available | 1 | 50 |
| Zizyphus spina-christi | Syrian Christ-Thorn | 1 | 0 |
| Zizyphus trinervia | not available | 1 | 57 |
| Zizyphus xylopyra | not available | 1 | 70 |