Table 2.

Larvicidal activity of the silver nitrate (AgNO₃)

Species	Concentrations (mg/L)	Percent mortality ± SD	LC50 (mg/L)	95 % confidence interval for LC50		r 2	χ 2 (df = 2)	Regression equation
				LCL (mg/L)	UCL (mg/L)
Anopheles subpictus	50	66 ± 2.36	42.544	38.41	47.126	0.954	2.561	y = −16.1x + 76.9
	40	43 ± 2.74
	30	23 ± 2.73
	20	8 ± 1.00
	10	3 ± 2.74
Culex quinquefasciatus	50	63 ± 2.73	44.922	42.388	47.612	0.936	1.693	y = −15.3x + 71.1
	40	36 ± 2.23
	30	19 ± 2.23
	20	7 ± 2.74
	10	1 ± 1.00
Aedes aegypti	50	69 ± 4.18	39.664	36.296	43.356	0.983	5.724	y = −16.6x + 83
	40	48 ± 2.74
	30	33 ± 2.73
	20	12 ± 3.33
	10	4 ± 2.23

Control–nil mortality, a mean value of five replicates, significant at P < 0.05 level, LC50 lethal concentration that kills 50 % of the exposed larvae

UCL upper confidence limit, LCL lower confidence limit, r2 regression co-efficient, χ2 Chi square, df degrees of freedom