Susceptibility Status of Aedes aegypti L. Against Different Classes of Insecticides in New Delhi, India to Formulate Mosquito Control Strategy in Fields

Table 5: Larvicidal activity of pyrethroids against early fourth instars of Aedes aegypti.

S. No.	Insecticides	LC₅₀ in ppm	LC₉₀ in ppm	χ² (df)	Slope ± SE
1	Deltamethrin	0.0008 (0.0006-0.0010)	0.0034 (0.0025-0.0054)	1.615 (4)	2.003±0.35
2	Lambda-cyhalothrin	0.0009 (0.0004-0.0014)	0.0035 (0.0022-0.0109)	6.458 (5)	2.174±0.39
3	Alpha-cypermethrin	0.0005 (0.0002-0.0009)	0.0037 (0.0016-0.0450)	23.175 (8)	0.966±0.20
4	Permethrin	0.0074 (0.0050-0.0150)	0.0817 (0.0281-1.5081)	13.372 (8)	1.5145±0.28

LC₅₀ - Lethal Concentration that kills 50% of the exposed larvae, LC₉₀ - Lethal Concentration that kills 90% of the exposed larvae; Values in parentheses indicate the lower and upper 95% fiducial limits; χ² = Chi-square, S.E. = Standard Error, df = degree of freedom.