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Table 9 Efficacy of imidacloprid 10%/flumethrin 4.5% collars against Dermacentor reticulatus and Dermacentor variabilis on dogs 48 h after each infestation

From: Efficacy of an imidacloprid/flumethrin collar against fleas, ticks, mites and lice on dogs

Study Day or Week Activity and efficacy (%)
Tick species Dermacentor reticulatus Dermacentor variabilis
Day −2 50 ticks (25♂ 25♀)
Day −1 50 ticks (25♂ 25♀) 50 ticks (both sexes)
Day 0 Collars fitted to treated group
Day 2 (therapeutic efficacy) 66.1 69.7 69.1
Day 7 99.5
Week 2 99.7
Week 4 100 99.1
Week 8 100 97.4 99.7
Week 12 99.7 98.7 98.5
Week 16 98.3 92.3 99.2
Week 20 97.2 97.5 94.4
Week 24 98.6 97.6 93.2
Week 28 98.5 92.6
Week 32 97.2 96.5
Week 34 96.4 90.1