Larvicidal activity of lignans and alkaloid identified in Zanthoxylum piperitum bark toward insecticide-susceptible and wild Culex pipiens pallens and Aedes aegypti

Table 5 Toxicity of Zanthoxylum piperitum bark constituents and temephos to third-instar larvae of Aedes aegypti during a 24 h exposure

Compound	n ^a	Slope ± SE	LC₅₀, mg/l (95% CI^b)	LC₉₀, mg/l (95% CI^b)	χ ^2c	P-value
XDA (2)^d	300	1.8 ± 0.17	0.24 (0.20–0.30)	1.29 (0.95–1.97)	6.37	0.983
Pellitorine (3)	240	2.6 ± 0.30	0.98 (0.84–1.16)	2.98 (2.30–4.36)	3.49	0.967
Sesamin (4)	240	2.4 ± 0.25	23.98 (20.48–28.33)	82.75 (63.03–122.72)	2.66	0.998
Asarinin (1)	300	7.5 ± 0.79	28.15 (26.25–29.95)	41.60 (38.51–46.18)	2.07	0.995
Temephos	240	1.6 ± 0.38	0.009 (0.007–0.012)	0.062 (0.032–0.373)	1.48	0.999

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