Table 7.
Efficacy of imidacloprid 10%/flumethrin 4.5% collars against Rhipicephalus sanguineus on dogs 48 h after each infestation
| Study Day or Week | Activity and efficacy (%) | |||
|---|---|---|---|---|
|
Day −2 |
50 ticks (25♂ 25♀) |
50 ticks (25♂ 25♀) |
– |
– |
|
Day −1 |
– |
– |
50 ticks (25♂ 25♀) |
50 ticks (both sexes) |
|
Day 0 |
Collars fitted to dogs in treated groups |
|||
|
Day 2 (therapeutic efficacy) |
84.8 |
64 |
46.5 |
32.2 |
|
Day 7 |
97 |
100 |
– |
98 |
|
Week 4 |
100 |
100 |
98 |
100 |
|
Week 8 |
98.4 |
100 |
98.3 |
100 |
|
Week 12 |
99.7 |
99.6 |
100 |
99.1 |
|
Week 16 |
96.7 |
100 |
98.1 |
100 |
|
Week 20 |
98.5 |
100 |
99.4 |
100 |
|
Week 24 |
99.1 |
100 |
99.7 |
99.4 |
|
Week 28 |
– |
100 |
96.9 |
96.6 |
|
Week 32 |
– |
98.2 |
96.8 |
90.3 |
| Week 35 | – | 100 | 99.1 | 93.2 |