Table 2.

Observed knock-down for DDT and the pyrethroids tested

Insecticides		Djnkore	Koar	Sankagne	Wassadou	Control strain
DDT	Number tested	108	100	124	106	106
	KD50 (min)	34.57	49.52	52.37	no kd	20.06
		(31.05–38.71)	(44.93–55.51)	(43.94–68.50)		(18.25–21.98)
	KD95 (min)	90.54	174.86	197.56	no kd	35.13
		(73.57–123.55)	(136.28–247.58)	(126.78–458.52)		(30.81–42.71)
deltamethrin	Number tested	106	103	107		103
	KD50 (min)	7.79	10.28	9.93	-	10.93
		(1.59–12.69)	(9.71–10.77)	(9.31–10.43)		(10.26–11.53)
	KD95 (min)	73.27	14.71	14.43	-	17.25
		(43.77–403.87)	(13.72–16.34)	(13.45–16.12)		(16.00–19.17)
lambdacyhalothrin	Number tested	119	102	103		101
	KD50 (min)	21.42	19.12	20.19	-	16.63
		(16.39–26.46)	(17.14–21.16)	(18.01–22.37)		(15.90–17.42)
	KD95 (min)	85.91	38.41	55.10	-	20.20
		(59.22–181.26)	(33.16–47.55)	(46.79–69.03)		(19.00–22.47)
permethrin	Number tested	-	147	113	100	102
	KD50 (min)	-	31.89	55.61	7.35	9.05
			(25.28–41.89)	(49.46–65.29)	(0.09–14.00)	-
	KD95 (min)	-	194.85	164.88	138.15	10.33
			(109.60–698.53)	(123.03–262.62)	(59.42–76.103)	-