Table 2 Study 2: Knock-down effect at 5 min and arithmetic mean flea counts and preventive efficacies at 2 h and 6 h (speed of kill) of the combination of permethrin and fipronil (group 2) and a combination of dinetofuran + permethrin + pyriproxyfen (Group 3) compared to control (Group 1)

D2

32.5 %^a

17.1 %

94,8

9.6 (89.8 %)

26.3 (72.3 %)

0.6 (99.3 %)

0.8 (99.2 %)

D7

31.9 %^a

6.6 %

88.6

0.9 (99.0 %)

8.1 (90.8 %)

0.0 (100.0 %)

0.9 (99.0 %)

D14

16.4 %^a

3.8 %

84.5

3.3 (96.2 %)

9.5 (88.8 %)

0.3 (99.7 %)

1.8 (97.9 %)

D21

33.7 %^a

10.1 %

97.3

5.4^a (94.5 %)

17.8 (81.7 %)

0.5 (99.5 %)

2.1 (97.7 %)

D28

29.9 %^a

6.5 %

94.3

14.0 (85.1 %)

17.4 (81.6 %)

1.3 (98.5 %)

1.9 (97.7 %)