Table 2.

Lethal concentrations (LC_1–99) of cypermethrin for earthworm, Eudrilus eugeniae (identified by well-defined clitellum, n = 10).

Lethal	Cypermethrin	95% Confidence limits
Concentration	(μg/cm2)	Lower	Upper
LC1	0.037	0.019	0.048
LC5	0.044	0.027	0.054
LC10	0.048	0.032	0.057
LC15	0.051	0.035	0.060
LC50	0.066	0.056	0.074
LC85	0.086	0.077	0.104
LC90	0.091	0.082	0.115
LC95	0.100	0.088	0.135
LC99	0.118	0.100	0.185
Slope ± SEM	9.29 ± 2.28
Intercept ± SEM	15.94 ± 2.61
Χ2 value	1.48
P	<0.05

Control group (theoretical spontaneous response rate) = 0.000.