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Table 1 Toxicity of fractions obtained from solvent partitioning of methanol extract of Zanthoxylum piperitum bark to third-instar larvae from Culex pipiens pallens during a 24 h exposure

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

Material

n a

Slope ± SE

LC50, mg/l (95% CIb)

LC90, mg/l (95% CIb)

χ 2c

P-value

Methanol extract

240

5.1 ± 0.57

5.91 (5.38–6.44)

10.50 (9.28–12.54)

3.25

0.974

Hexane-soluble fraction

240

4.3 ± 0.47

4.18 (3.69–4.64)

8.27 (7.26–9.89)

4.90

0.932

Chloroform-soluble fraction

240

5.1 ± 0.54

5.02 (4.53–5.50)

9.02 (8.04–10.58)

6.01

0.921

Ethyl acetate-soluble fraction

60

 

>100

   

Water-soluble fraction

60

 

> 100

   
  1. aNumber of larvae tested
  2. bCI denotes confidence interval
  3. cPearson’s chi-square goodness-of-fit test