Table 4.

Percent insecticidal efficacy of Aedes albopictus, Aedes aegypti and Culex pipiens in dogs treated with a new combination of fipronil and permethrin

Species	Time post exposure 1	Percent insecticidal efficacy 2
		Day 1	Day 7	Day 14	Day 21	Day 28	Day 35
A. albopictus	4 h	ND3	100*	93.2*	93.7*	91.1*	ND
	24 h	ND3	100*	97.1*	100*	100*	ND
	48 h	ND3	100*	97.8*	100*	100*	ND
A. aegypti	4 h	99.8*	93.8*	69.5*	77.0*	20.9*	27.1*
	24 h	99.7*	99.9*	98.0*	98.5*	79.8*	75.7*
	48 h	99.7*	99.8*	99.1*	99.3*	86.6*	84.7*
C. pipiens	24 h	77.9*	92.1*	34.7*	38.5*	26.9*	ND
	48 h	79.4*	93.8*	37.3*	45.0*	30.9*	ND

¹Mosquitoes were collected at the end of the 1-h exposure period. ²Based on geometric means.

³Analysis not performed on these days.

*Significant difference between the population means of the treated and control groups (p = 0.005).