. 2016 Sep 19;7:23–38. doi: 10.2147/RRTM.S108881

Table 2.

Larval bioassay for technical and formulation malathion and spinosad against Culex pipiens

Insecticide	Time (hours)	LC₅₀ (mg/L)	95% confidence limits (mg/L)		Slope^a ± SE	Intercept^b ± SE	χ²^c
Insecticide	Time (hours)	LC₅₀ (mg/L)	Lower	Upper	Slope^a ± SE	Intercept^b ± SE	χ²^c
Malathion (technical)	24	1.108	0.508	2.209	1.403±0.111	–0.063±0.058	22.686
Malathion (technical)	48	0.750	0.255	1.568	1.476±0.112	0.184±0.059	30.094
Malathion (formulation)	24	4.407	4.071	4.760	4.239±0.348	–2.730±0.242	3.997
Malathion (formulation)	48	3.397	2.790	4.044	4.207±0.299	–2.234±0.188	13.801
Spinosad (technical)	24	0.075	0.059	0.102	2.741±0.251	3.080±0.3	13.310
Spinosad (technical)	48	0.048	0.023	0.072	2.331±0.218	3.084±0.275	25.926
Spinosad (formulation)	24	0.008	0.006	0.01	2.725±0.227	5.764±0.449	10.203
Spinosad (formulation)	48	0.001	0	0.003	1.951±0.425	5.543±0.898	7.727

Notes:

Slope of the concentration–mortality regression line ± SE.

Intercept of the regression line ± SE.

Chi-square value.

Abbreviation: LC₅₀, lethal concentration causing 50% mortality; SE, standard error.