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Table 4 The onset of efficacy of imidacloprid 10%/flumethrin 4.5% collars against adult Ctenocephalides felis felis

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

Study Day Activity Efficacy (%)
Day −1 100 fleas  
Day 0 Collars fitted  
Day 1 (onset of efficacy)   100
Day 6 100 fleas  
Day 7 (12 h after infestation on Day 6)   100
Day 7 100 fleas  
Day 7 (6 h after infestation)   100
Day 7 100 fleas  
Day 7 (2 h after infestation)   100