Table 1 Quantification of the fit between the observed and predicted combined effect of the toxicant: experimental observations and predictions of toxicant effect on Daphnia magna exposed to esfenvalerate alone and in combination with prochloraz concentrations under high- and low-food conditions

Day 21

Low food

–

–

–

–

–

–

–

6.0

8.3

5.6

0.079

1.7

3.2

0.93

4.2

17

10

0.0023

0.34

25

6.8

5.8

25

18

0.0008

2.8

660

150

High food

–

–

–

–

–

–

–

6.8

3.1

3.1

0.59

0.77

0.94

0.94

8.4

17

16

0.21

1.4

2.8

2.6

4.9

14

13

0.22

1.0

2.7

2.6

Day 7

Low food

–

–

–

–

–

–

–

5.9

9.7

6.8

0.11

2.1

2.8

1.4

4.1

15

9.8

0.017

1.4

14

6.2

7.7

25

19

0.0032

3.2

240

75

High food

–

–

–

–

–

–

–

5.6

4.4

4.4

0.49

0.80

0.82

0.82

8.0

14

14

0.33

1.2

2.1

2.0

7.4

13

13

0.19

0.71

2.2

2.1