Table 2.

Contact toxicity of Etlingera yunnanensis rhizomes essential oil and its constituents against Tribolium castaneum (TC) and Liposcelis bostrychophila (LB).

Insects	Treatments ***	LD50 (µg/adult; µg/cm2)	95% FL (µg/adult; µg/cm2)	Slope ± SE	Chi Square (χ2)	p-Value
TC	Essential oil	23.33	20.09–25.27	5.07 ± 0.57	13.29	0.946
	Estragole	20.41	18.95–22.36	5.18 ± 0.53	15.64	0.87
	β-Caryophyllene	41.72	37.94–45.52	5.28 ± 0.54	18.58	0.725
	1,8-Cineole	18.86	17.51–20.65	5.04 ± 0.51	18.00	0.757
	Limonene	13.40	11.72–15.49	3.23 ± 0.41	9.96	0.992
	Pyrethrins *	0.26	0.22–0.30	3.34 ± 0.32	13.11	0.950
LB	Essential oil	47.38	45.66–49.11	14.09 ± 1.51	10.02	0.991
	Estragole	30.22	28.13–32.49	8.04 ± 0.96	6.25	0.995
	β-Caryophyllene	74.11	71.26–77.75	10.40 ± 1.08	20.11	0.635
	1,8-Cineole	321.20	302.38–333.90	12.49 ± 1.31	11.37	0.979
	Limonene	259.62	238.13–283.68	5.56 ± 0.57	16.10	0.851
	Pyrethrins **	18.72	17.60–19.92	2.98 ± 0.40	10.56	0.987

* Data from You et al. [35]; ** data from Yang et al. [31]. *** The mortality of the control (acetone) was 0 μg/adult for TC and 0 µg/cm² for LB.