Table 1.

Summary of data on the toxicity (LC₅₀, EC₅₀, EC₂₀, and NOEC) of imidacloprid and thiacloprid (mg/kg dry soil) on five selected soil organisms, exposed to both compounds in LUFA 2.2 soil. EC₅₀ and NOEC values are for effects on reproduction, except for the isopods Porcellio scaber for which EC₅₀ is based on food consumption and NOEC on weight change and food consumption

Species	Imidacloprid				Thiacloprid
	LC50	EC50	EC20	NOEC	LC50	EC50	EC20	NOEC
Eisenia andrei	0.77 Δ	0.39	0.27	0.3	7.1 Δ	0.44	0.19	0.3
	(0.65–0.91)	(0.21–0.56)	(0.17–0.36)		(5.8–8.8)	(0.25–0.63)	(0.06–0.32)
Enchytraeus crypticus	>30	2.0	1.2	1.0	>30	12	5.5	3.0
		(1.6–2.5)	(0.73–1.6)			(8.4–16)	(2.5–8.6)
Folsomia candida
Acetonea	0.20	0.097	0.045	0.1	–	–	–	–
	(0.14–0.25)	(0.040–0.16)	(0–0.09)
Acetoneb	0.62 Δ	0.30	0.17	0.25	2.7 Δ	2.4	1.3	1.1
	(0.53–0.73)	(0.20–0.39)	(0.11–0.30)		(2.1–3.5)	(1.5–3.2)	(0.53–2.1)
Waterb	0.47 Δ	0.26	0.17	0.1	3.9 Δ	1.7	0.95	1.1
	(0.38–0.58)	(0.20–0.32)	(0.10–0.24)		(3.2–4.9)	(0.97–2.4)	(0.37–1.5)
Oppia nitens	360 Δ	119	na	100	>1000	76	na	>100
	(248–524)	(–)				(–)
Porcellio scaber	7.6 Δ	6.7#		8.0#	>32	>32#		32#
	(5.2–11)	(–)		32*				16*

na not applicable, ∆ calculated using the Trimmed Spearman-Karber method (Hamilton et al. 1977), () confidence intervals, (–) no reliable confidence interval could be calculated

^a First test

^b Second test

#Effects on food consumption

*Effects on weight change