Toxicity of six plant extracts and two pyridone alkaloids from Ricinus communis against the malaria vector Anopheles gambiae

Table 2 Relative toxicity of different plant extracts against female An. gambiae s.s. after 3 days of oral feeding

Plant extract	χ²	Regression equation	LC₅₀(mg/mL)	LCL-UCL(mg/mL)	LC₉₀(mg/mL)	LCL-UCL(mg/mL)
A. afra	1.99	y = 3.38 + 1.26x	19.56	15.93 - 25.84	204.48	119.95 - 434.91
B. pilosa	0.97	y = 2.94 + 1.56x	21.09	17.31 - 27.70	140.35	87.87 - 272.85
P. hysterophorus	1.76	y = 2.35 + 2.08x	18.90	15.61 - 25.44	78.28	49.85 - 161.91
T. diversifolia	2.17	y = 3.71 + 1.40x	8.30	7.53 - 9.28	67.86	50.99 - 97.14
R. communis	3.61	y = 2.65 + 2.14x	8.69	11.28 - 14.25	49.53	37.89 - 70.97
S. didymobotrya	2.33	y = 1.84 + 2.30x	23.39	18.29 - 35.67	84.27	50.33 - 208.19
A. indica	1.37	y = 3.58 + 1.51x	8.69	7.86 - 9.75	61.17	45.68 - 89.40

LC₅₀ and LC₉₀ lethal concentration that kills 50% and 90% of the ingesting female An. gambiae s.s. respectively, LCL lower confidence limit, UCL upper confidence limit based on 95% Confidence interval, χ² chi-square values.

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