Table 1.
Antibacterial activity of essential oils by the paper disc assay

	Diameter of clear zone (mm)1)
	E. tarda a)	P. damselae a)	L. garvieae b)	S. parauberis b)
	A. holophylla	21.5 ± 0.71	23.5 ± 0.71	12.75 ± 0.35	11.0 ± 0.0
P. thunbergii	21.0 ± 1.41	20.5 ± 2.12	8.5 ± 0.71	14.0 ± 0.0
P. parviflora	N.D. 2)	8.0 ± 0.0	7.5 ± 0.0	N.D.
P. rigitaeda	13.0 ± 0.0	11.5 ± 0.71	7.5 ± 0.0	10.25 ± 1.77
T. sieboldii	16.0 ± 0.0	13.25 ± 0.35	8.5 ± 0.0	9.75 ± 0.35

Mean and standard deviation were calculated from two independent experiments.
N.D.: Not detected.
Gram-negative bacteria.
Gram-positive bacteria.