Table 1.

Fumigant toxicity of essential oils and their combinations against Callosobruchus chinensis.

Time	LC50 (µL/mL)	CL (µL/mL)	Slope ± SE	Chi- Square	p-Value	Co-Toxicity Coefficient	Interaction Type
Tagetes minuta
24 h	3.49	2.77–5.36	2.28 ± 0.53	0.21	0.98	-	-
48 h	1.41	1.09–1.71	2.90 ± 0.49	0.87	0.83	-	-
Mentha piperita
24 h	2.06	2.46–3.47	3.44 ± 0.62	2.04	0.56	-	-
48 h	0.98	0.66–1.23	2.82 ± 0.52	3.41	0.33	-	-
Mentha spicata
24 h	1.88	1.40–2.42	2.00 ± 0.45	5.10	0.16	-	-
48 h	0.94	0.62–1.20	2.74 ± 0.52	2.62	0.45	-	-
Tagetes minuta + Mentha piperita
24 h	1.35	1.02–1.64	2.86 ± 0.49	0.89	0.83	258.52	Synergistic
48 h	0.87	0.58–1.10	3.12 ± 0.58	1.54	0.67	162.07	Synergistic
Tagetes minuta + Mentha spicata
24 h	1.53	1.29–1.76	4.22 ± 0.59	4.60	0.20	228.10	Synergistic
48 h	1.07	0.86–1.25	4.48 ± 0.68	1.23	0.75	131.78	Synergistic

CL: Confidence limits.