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

Table 3

Mean AChE specific activities ± SE measured in mature earthworms (A. caliginosa) after exposure to different concentrations of buprofezin, triflumuron, and lufenuron for one, two, and four weeks.

Pesticide	Concentration; (mg a.i/kg soil)	Specific activity ± SE (ΔOD412⋅min^−1⋅mg protein^−1)		I50 with 95% confidence limits (mg a.i/kg soil)
		2 weeks	4 weeks	2 weeks	4 weeks
	0 (Control)	10.23^a±0.337	39.83^a±0.481
Buprofezin	50	4.71^d±0.190	13.22^c±0.789	45.04 (25.24–61.70)	24.74 (10.17–53.05)
	100	3.28^e±0.128	12.34^cde±1.487
	150	2.85^e±0.076	10.15^efg±0.164
	200	2.08^f±0.146	7.91^gh±0.828
	300	1.14^g±0.038	3.40^ik±1.684
Triflumuron	50	6.51^c±0.321	16.62^b±0.248	84.49 (57.01–107.76)	28.77 (5.68–50.76)
	100	4.49^d±0.219	12.65^cd±0.273
	150	3.57^e±0.286	10.81^def±0.093
	200	3.39^e±0.177	9.68^fg±0.283
	300	3.13^e±0.448	7.33^h±1.172
Lufenuron	0.5	9.53^a±0.326	10.44^def±1.375	15.24 (10.37–25.98)	0.077 (0.015–0.184)
	1	8.19^b±0.413	6.30^h±0.641
	5	6.44^c±0.167	3.70^i±0.741
	10	5.27^d±0.235	1.20^kl±0.171
	25	4.97^d±0.426	0.71^l±0.499

Results are expressed as mean ± standard error (𝑛=3). Values followed by the same letter within a column are not significantly different (𝑃≤0.05) according to Duncan's test. a.i. is active ingredient of the tested pesticides.