Table 3.

Frequencies of kdr mutation according to the phenotype (resistant/susceptible) of different forms of Cx. pipiens in Mohammadia, Morocco

Insecticide	Cx. pipiens form	Phenotype	n (%)	Insecticide resistance (%)	Genotype			Frequency of allele
					SS n (%)	RS n (%)	RR n (%)
Lambda-cyhalothrin	Cx. p. pipiens	Susceptible	23 (45.0)		14 (61.0)	8 (35.0)	1 (4.0)	0.39
		Resistant	28 (55.0)	49	4 (14.0)	19 (68.0)	5 (18.0)	0.52
		Total	51		18 (35.0)	27 (53.0)	6 (12.0)	0.38
	Hybrid	Susceptible	25 (56.0)		17 (68.0)	6 (24.0)	2 (8.0)	0.20
		Resistant	20 (44.0)	35	2 (10.0)	16 (80.0)	2 (10.0)	0.50
		Total	45		19 (42.0)	22 (49.0)	5 (11.0)	0.35
	Cx. p. molestus	Susceptible	6 (40.0)		3 (50.0)	3 (50.0)	0	0.25
		Resistant	9 (60.0)	16	2 (22.0)	7 (78.0)	0	0.39
		Total	15		5 (33.0)	10 (67.0)	0	0.33
Permethrin	Cx. p. pipiens	Susceptible	28 (57.0)		9 (32.0)	19 (68.0)	0	0.34
		Resistant	21 (43.0)	48	3 (14.0)	14 (67.0)	4 (19.0)	0.52
		Total	49		12 (24.5)	33 (67.0)	4 (8.0)	0.42
	Hybrid	Susceptible	37 (64.0)		7 (19.0)	28 (76.0)	2 (5.0)	0.43
		Resistant	21 (36.0)	48	3 (14.0)	15 (72.0)	3 (14.0)	0.50
		Total	58		10 (17.0)	43 (74.0)	5 (9.0)	0.45
	Cx. p. molestus	Susceptible	9 (82.0)		3 (33.0)	6 (67.0)	0	0.33
		Resistant	2 (18.0)	5	1 (50.0)	1 (50.0)	0	0.25
		Total	11		4 (36.0)	7 (64.0)	0	0.32
DDT	Cx. p. pipiens	Susceptible	10 (14.0)		8 (80.0)	2 (20.0)	0	0.10
		Resistant	62 (86.0)	67	10 (16.0)	44 (71.0)	8 (13.0)	0.48
		Total	72		18 (25.0)	46 (64.0)	8 (11.0)	0.43
	Hybrid	Susceptible	4 (12.5)		2 (50.0)	2 (50.0)	0	0.25
		Resistant	28 (87.5)	30	2 (7.0)	20 (71.5)	6 (21.5)	0.57
		Total	32		4 (12.0)	22 (69.0)	6 (19.0)	0.53
	Cx. p. molestus	Susceptible	4 (67.0)		0	4 (100)	0	0.50
		Resistant	2 (33.0)	2	0	2 (100)	0	0.50
		Total	6		0	6 (100)	0	0.50

Abbreviations: RR homozygote resistant, RS heterozygote resistant,SS homozygote susceptible