Insecticide resistance in Anopheles arabiensis (Diptera: Culicidae) from villages in central, northern and south west Ethiopia and detection of kdr mutation

Table 1 Mortality and knockdown effect of insecticides on An. arabiensis from three localities in Ethiopia.

Locality	Insecticide	Number tested	Percent mortality	KT₅₀in minutes (95% confidence interval)	KT₉₀in minutes (95% confidence interval)
Gorgora	DDT	198	49.5	*	*
	Permethrin	140	85.0	19.6 (17.5-21.6)	28.7(26.2-32.5)
	Deltamethrin	160	80.6	25.3 (23.2-27.5)	35.9(33.1-40.0)
Ghibe	DDT	160	3.8	**	**
	Permethrin	60	31.7	***
	Deltamethrin	160	31.3	37.6 (34.7-40.5)	56.6(52.8-61.7)
Sodere	DDT	118	78.8	****	****
	Permethrin	80	100	17.8 (15.9-19.7)	25.8(23.4-25.9)
	Deltamethrin	120	99.2	21.9 (19.9-23.9)	31.0(28.6-34.8)

*60% were knockeddown at the end of 80 m, ** only 4 mosquitoes were knocked down at the end of 80 minutes,***41.7% were knockeddown at the end of 80 m**** 77.1% were knockeddown at the end of 80 m.

ISSN: 1756-3305