Table 2. Recovery of ¹⁴C PEG for the different applied feeding regimes.

Mean recovery of ¹⁴C labelled sugar solution diet and number of replicates for experimental setups with 10 or 30 bees for temporary¹ (T) and permanent² (P) feeding regimes without imidacloprid and for acute³ (A) and chronic⁴ (C) feeding regimes with imidacloprid.

Feeding regime	Experiment	Mean Recovery in%	Replicates (cages)
10 bees per cage
Temporary	T1, T3-T11, TA12, TA13	71.9	54
Acute	A1, A2, A3, AA4	72.6	20
Permanent	P1-P5	84.5	30
Chronic	C1-C4	89.9	24
30 bees per cage
Temporary	T14, T15	78.9	6
Acute	A5	67.9	3
Permanent	P6	80.7	3
Chronic	C5, C6	74.5	4
Total		77.6	144

¹ temporary: test bees initially provided with defined amount (25μL/100μL) of ¹⁴C labelled diet, followed by unlabelled diet ad libitum for maintenance

² acute: test bees initially provided with defined amount (25μL/100μL) of ¹⁴C labelled diet containing LD₅₀ or ¹/₅₀ LD₅₀ imidacloprid, followed by unlabelled diet ad libitum for maintenance

³ permanent: test bees provided with ¹⁴C labelled diet ad libitum

⁴ chronic: test bees provided with ¹⁴C labelled diet containing LD₅₀ or ¹/₅₀ LD₅₀ imidacloprid ad libitum