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Table 2 Toxicity of fractions obtained from solvent partitioning of methanol extract of Zanthoxylum piperitum bark to third-instar larvae from Aedes aegypti 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 4.3 ± 0.47 3.95 (3.47–4.40) 7.88 (6.92–9.40) 4.03 0.945
Hexane-soluble fraction 240 4.0 ± 0.43 4.21 (3.75–4.73) 8.78 (7.47–11.19) 3.90 0.951
Chloroform-soluble fraction 240 3.8 ± 0.47 5.68 (5.06–6.33) 12.30 (10.37–15.94) 4.14 0.941
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