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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 |
|---|---|---|---|
| Rheum officinale | Chinese Rhubarb | 2 | 22, 000 |
| Rheum palmatum | Chinese Rhubarb | 3 | 717 |
| Rheum rhabarbarum | Rhubarb | 5 | 6, 000 |
| Rhizophora mangle | Red Mangrove | 1 | 116, 800 |
| Rhizophora mucronata | not available | 1 | 0 |
| Rhododendron anthopogon | not available | 1 | 0 |
| Rhododendron dauricum | Chinese Alpenrose | 5 | 0 |
| Rhododendron ledebourii | not available | 1 | 0 |
| Rhododendron ponticum | Pontic Alpenrose | 4 | 0 |
| Rhododendron schotense | not available | 1 | 0 |
| Rhodomyrtus tomentosa | not available | 1 | 32 |
| Rhus alata | not available | 1 | 50 |
| Rhus coriaria | Sicilian Sumac; Sumac; Tanner's Sumac | 5 | 0 |
| Rhus toxicodendron | Poison Ivy | 2 | 0 |
| Rhus typhina | not available | 1 | 0 |
| Ribes nigrum | Black Currant | 11 | 119, 041 |
| Ribes rubrum | Red Currant; White Currant | 1 | 0 |
| Ribes uva-crispa | Gooseberry | 1 | 0 |
| Ricinus communis | Castorbean | 7 | 2, 000 |
| Robinia pseudoacacia | Black Locust | 2 | 0 |