Tinkturenpresse

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Poaceae - syn. Andropogon nardus L., citronella grass, Citronella Gras

Perennial, native to South India and Sri Lanka, introduced elsewhere and commonly cultivated as a crop plant.
Essential oil extracted from the aerial parts is the source of the commercial „citronella oil“ which is used as an insect repellent. http://www.floridata.com/ref/c/cymb_nar.cfm

„Major constituents of the oil were geraniol (35.7% of total volatiles), trans-citral (22.7%), cis-citral (14.2%), geranyl acetate (9.7%), citronellal (5.8%) and citronellol (4.6%). The antifungal assay using the vapor-agar contact method showed that the crude essential oil markedly suppressed the growth of several species of Aspergillus, Penicillium and Eurotium at a dose of 250 mg/L in air. The most active compounds among the 16 examined volatiles, consisting of 6 major constituents of the essential oil and 10 other related monoterpenes were citronellal and linalool. Citronellal and linalool completely inhibited the growth of all tested fungal strains at a dose of 112 mg/L. Their minimum inhibitory doses ranged from 14 to 56 mg/L. The α- and β- pinenes showed an inhibitory activity against some fungi, whereas the other 8 volatile compounds lacked this property.“
[Chemical composition and antifungal activity of essential oil from Cymbopogon nardus (citronella grass). Nakahara, K., Alzoreky, N. S., Yoshihashi, T., Nguyen, H. T., Trakoontivakorn, G., Japan Agricultural Research Quarterly, Vol.37(4), 2003, 249-252]