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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