Fumigant Compounds from the Essential Oil of Chinese Blumea balsamifera Leaves against the Maize Weevil (Sitophilus zeamais)

Table 2

Fumigant toxicity of Blumea balsamifera essential oil and its constituent compounds against Sitophilus zeamais adults.

Treatments	Conc.	Mortality	LC50 (mg/L air)	LC90 (mg/L air)	Slope ± SE	Chi square (𝜒^2)
	(%)	(%±SE)	(95% FL)	(95% FL)
	20.00	98.0 ± 1.22
	14.29	72.0 ± 3.43
Borneol	10.20	48.0 ± 3.41	29.64 (27.39–31.98)	40.11 (37.67–43.24)	2.37 ± 0.32	15.34
	7.29	34.0 ± 2.34
	5.21	8.0 ± 1.22
	20.00	88.0 ± 3.43
	13.33	65.0 ± 2.45
Camphor	8.89	47.0 ± 1.43	21.67 (19.74–23.25)	43.54 (39.76–47.32)	2.18 ± 0.25	8.39
	5.92	36.0 ± 1.32
	3.95	10.0 ± 2.32
	3.00	95.0 ± 1.34
	1.50	78.0 ± 3.43
1,8-Cineole	0.75	56.0 ± 2.45	2.96 (2.76–3.21)	5.46 (4.78–5.93)	1.72 ± 0.15	9.48
	0.38	35.0 ± 1.56
	0.19	12.5 ± 0.78
	10.00	95.0 ± 2.34
	5.00	84.0 ± 1.68
α-Terpineol	2.50	62.0 ± 1.87	7.45 (6.51–8.32)	12.18 (10.79–13.23)	2.13 ± 0.21	11.79
	1.25	38.0 ± 1.54
	0.66	13.0 ± 0.89
	8.00	94.0 ± 3.43
	4.00	72.0 ± 2.43
4-Terpineol	2.00	48.0 ± 1.45	4.79 (4.31–5.22)	8.37 (7.67–9.27)	2.07 ± 0.19	3.14
	1.00	32.0 ± 1.67
	0.50	7.0 ± 0.56
MeBr^*	—	—	0.67	—	—	—
	15.0	98.0 ± 2.54
	7.50	86.0 ± 1.95
Crude oil	3.75	65.0 ± 1.65	10.71 (9.76–11.75)	18.82 (17.13–20.67)	1.77 ± 0.13	5.28
	1.88	42.0 ± 1.44
	0.94	16.0 ± 0.99

∗MeBr: Methyl bromide; values from Liu and Ho [6].