Table 2.

Yield of essential oil (from dried herbal material) obtained from different Agastache species

Species	Oil yield (% v/w) d.w.	References
A. foeniculum	0.07–3.00	Charles et al. (1991)
	0.02–0.74	Svoboda et al. (1995)
	1.87	Omidbaigi and Sefidkon (2003)
	1.5–1.8	Mallavarapu et al. (2004)
	2.0	Omidbaigi and Sefidkon (2004)
	0.5–0.8	Suchorska-Tropilo and Pióro-Jabrucka (2004)
	2.1–2.88	Omidbaigi et al. (2008)
	2.3	Omidbaigi and Mahmoodi (20100
A. mexicana	1.45	Svoboda et al. (1995)
	0.4–0.6	Suchorska-Tropilo and Pióro-Jabrucka (2004)
A. rugosa	1.53–2.73	Charles et al. (1991)
	0.92–2.28	Svoboda et al. (1995)
	0.5–0.8	Dung et al. (1996)
	0.19	Maruyama et al. (2002)
	0.3–1.0	Suchorska-Tropilo and Pióro-Jabrucka (2004)
	0.37	Wang (2010)
	0.29–0.57	Gong et al. (2012a)
	0.32	Li et al. (2013)
A. scrophulariifolia	0.99	Svoboda et al. (1995)
A. urticifolia	0.89	Svoboda et al. (1995)