Table 2.

Larvicidal activity, mean efficacy (percentage ± S.D) of synthetic compounds against fourth instar larvae of Aedes aegypti and Culex quinquefasciatus.

Compound	Concentration   (ppm)	% Mortality a(ppm) ± SD
		A. aegypti	C.  quinquefasciatus
4a	50	22.4 ± 6.69	36.2 ± 4.24
	25	16.2 ± 1.26	16.2 ± 6.00
	12.5	12.0 ± 4.01	10.0 ± 4.28
	6.25	8.2 ± 0.24	6.8 ± 0.43
	3.12	4.6 ± 0.62	2.0 ± 1.86
4b	50	78.2 ± 5.72	92.8 ± 8.18
	25	64.8 ± 1.79	71.4 ± 7.70
	12.5	55.4 ± 8.38	58.0 ± 7.91
	6.25	42.2 ± 1.39	36.2 ± 8.43
	3.12	22.4 ± 6.69	46.8 ± 5.67
4c	50	72.6 ± 6.05	87.0 ± 3.39
	25	68.6 ± 2.15	54.4 ± 2.04
	12.5	45.2 ± 8.83	34.8 ± 2.26
	6.25	24.2 ± 4.06	10.2 ± 3.42
	3.12	14.6 ± 2.84	8.0 ± 1.53
4d	50	52.6 ± 2.48	46.2 ± 2.84
	25	48.4 ± 2.68	43.2 ± 0.66
	12.5	39.0 ± 6.73	65.0 ± 7.65
	6.25	26.4 ± 10.56	39.4 ± 14.25
	3.12	18.6 ± 3.60	22.6 ± 3.45
4e	50	100 ± 0.00	100 ± 0.00
	25	84.0 ± 1.79	91.4 ± 2.80
	12.5	65.4 ± 2.38	58.0 ± 6.90
	6.25	48.2 ± 4.04	42.2 ± 2.06
	3.12	26.4 ± 2.06	36.8 ± 5.04
4f	50	82.4 ± 0.62	76.6 ± 1.04
	25	66.1 ± 1.96	48.9 ± 1.43
	12.5	52.0 ± 1.49	36.2 ± 0.18
	6.25	28.2 ± 0.24	28.1 ± 0.22
	3.12	16.8 ± 1.22	18.0 ± 1.16