Table 2: Larvicidal activity of organochlorines against early fourth instars of Aedes aegypti.

S. No. Insecticides LC50 in ppm LC90 in ppm χ2
(df)
Slope ± SE
1 Lindane 0.0832
(0.0662-0.1014)
0.4011
(0.3062-0.5819)
5.29 (7) 1.737±0.28
2 Endosulphan 0.3987
(0.2863-0.5085)
0.7163
(0.5552-1.1754)
9.64 (5) 1.29±0.65

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.