Toxicity Assessment of Buprofezin, Lufenuron, and Triflumuron to the Earthworm Aporrectodea caliginosa

Table 2

Toxicity of buprofezin, triflumuron, and lufenuron on mature earthworms (A. caliginosa) 28 days after treatment.

Compound	LC50^a (mg a.i/kg) ± SE	95% confidence limits (mg/kg)		Slope^b  ± SE	Intercept^c  ± SE	(χ ^2)^d	Toxicity index^e
		Lower	Upper
Buprofezin	421.41±31.76	298.38	851.62	1.25±0.24	−3.28±0.53	1.53	0.44
Triflumuron	476.97±50.61	353.56	822.11	1.78±0.29	−4.77±0.65	2.58	0.39
Lufenuron	1.87±0.45	0.59	3.96	1.06±0.10	−0.29±0.0.08	9.08	100

aThe concentration causing 50% mortality of the earthworm. Results of LC₅₀ are expressed as mean of four replicates ± standard error.
^bSlope of the concentration-mortality regression line ± standard error.
^cIntercept of the regression line ± standard error.
^dChi-square value.
^eToxicity index = (LC₅₀ level for the most effective pesticide/LC₅₀ level for the other pesticide) × 100.