Table 3.

Larvicidal activity of temephos (positive control) against Aedes aegypti larvae.

Time	Larval instars	Lethal concentration		LFL	UFL	Chi-square	P value	Regression equation
12 h	2nd	LC50	1.17	0.92	1.39	2.69	0.00	Y = −0.420 + 1.351x
		LC90	1.45	1.15	1.67	2.69	0.00	Y = −0.420 + 1.351x
	3rd	LC50	1.78	1.39	1.98	3.34	0.00	Y = −0.492 + 1.274x
		LC90	1.99	1.86	2.16	3.34	0.00	Y = −0.492 + 1.274x
24 h	2nd	LC50	0.95	0.88	1.07	13.40	0.004	Y = −0.064 + 3.000x
		LC90	1.14	0.97	1.56	13.40	0.004	Y = −0.064 + 3.000x
	3rd	LC50	1.26	0.99	1.43	13.69	0.003	Y = −0.051 + 1.94x
		LC90	1.68	1.47	1.84	13.69	0.003	Y = −0.051 + 1.94x
36 h	2nd	LC50	0.79	0.59	0.96	8.12	0.000	Y = 0.723 + 2.42x
		LC90	0.98	0.86	1.15	8.12	0.000	Y = 0.723 + 2.42x
	3rd	LC50	1.07	0.91	1.23	0.40	0.022	Y = 0.604 + 2.45x
		LC90	1.27	1.12	1.40	0.40	0.022	Y = 0.604 + 2.45x
48 h	2nd	LC50	0.63	0.41	0.87	0.023	0.999	Y = 0.96 + 10.65x
		LC90	0.82	0.56	1.05	0.023	0.999	Y = 0.96 + 10.65x
	3rd	LC50	0.88	0.65	1.03	0.005	1.0	Y = 0.78 + 9.74x
		LC90	1.02	0.81	1.62	0.005	1.0	Y = 0.78 + 9.74x

LFL: Lower Fiducial Limit, UFL: Upper Fiducial Limit.