Generations

Mosquito strains

 Intercept Slope ± SE LC50 (g/litre) LC95 (g/litre) χ2 (df) RR (at LC50)c RR (at LC95)c

F49

Parents
MSa 8.32

   1.48 ± 0.18 0.006
(0.007-0.005)		 0.075
(0.107-0.052)		 6.72(6)    
GRb 5.52 1.31 ± 0.17 0.401
(0.48-0.33)		 7.22
(11.12-4.69)		 2.27(6) 66.83
(96.0-47.14)		 96.30
(213.8-43.8)
Reciprocal crosses
MS x GR		 6.35 1.24 ± 0.16 0.082
(0.098-0.07)		 1.72
(2.69-1.10)		 3.40(6) 13.67
(19.6-10.0)		 22.93
(51.73-10.3)
MS x GR 6.37 1.33 ± 0.17 0.094
(0.11-0.078)		 1.59
2.43-1.05)		 6.22(6) 15.67
(22.0-11.14)		 21.2
(46.73-9.81)
F50 Parents
MSa 8.32		 8.20 1.39 ± 0.17 0.005
(0.006-0.004)		 0.076
(0.11-0.05)		 4.56(6)    
GRb 5.33 1.41 ± 0.22 0.58
(0.81-0.42)		 8.64
(19.17-3.89)		 13.65(6) 116.0
(202.5-70.0)		 113.7
(383.4-35.4)
Reciprocal crosses
MS x GR		 6.29 1.27 ± 0.17 0.098
(0.12-0.08)		 1.92
(3.00-1.22)		 6.06(6) 19.6
(30.0-13.3)		 25.26
(60.0-11.1)
MS x GR 6.38 1.36 ± 0.17 0.097
(0.116-0.08)		 1.58
(2.37-1.05)		 3.78(6) 19.4
(29.0-13.3)		 20.79
(47.4-9.55)
F51 Parents
MSa 8.32		 8.34 1.44 ± 0.18 0.0049
(0.006-0.004)		 0.067
(0.096-0.047)		 3.79(6)    
GRb 5.63 1.32 ± 0.17 0.33
(0.39-0.28)		 5.83
(8.82-3.86)		 3.90(6) 67.3
(97.5-46.7)		 87.0
(187.7-40.2)
Reciprocal crosses
MSxGR		 6.31 1.27 ± 0.16 0.094
(0.112-0.078)		 1.84
(2.86-1.18)		 3.87(6) 19.18
(28.0-13.0)		 27.46
(60.85-12.29)
MSxGR 6.41 1.39 ± 0.17 0.096
(0.114-0.081)		 1.48
(2.21-0.98)		 7.77(6) 19.59
(28.5-13.5)		 22.1
(47.0-10.21)
F52

 

 Parents
MSa 8.32		 8.26 1.54 ± 0.18 0.007
(0.0091-0.0066)		 0.09
(0.128-0.06)		 4.43(6)    
GRb 5.55 1.34 ± 0.17 0.39
(0.46-0.32)		 6.50
(9.87-4.28)		 3.18(6) 55.7
(69.7-35.2)		 72.2
(164.5-33.4)
Reciprocal crosses
MSxGR		 6.28 1.28 ± 0.17 0.099
(0.119-0.082)		 1.91
(2.99-1.22)		 4.26(6) 14.14
(18.0-9.01)		 21.2
(49.83-9.53)

MSxGR

 6.36 1.39 ± 0.17 0.105
(0.124-0.088)		 1.61
(2.40-1.079)		 1.63(6) 15.0
(18.79-9.67)		 17.89
(40.0-8.43)
Table 1: Dose/mortality results for the progeny of Bacillus sphaericus (Bs) susceptible, resistant and reciprocal crosses of Culex quinquefasciatus in bioassays with Bs toxin.
Strains of Culex quinquefasciatus : aBs susceptible and bBs resistant strains; c resistance ratio at LC 50 and LC 95 levels calculated by substracting the values from resistant and susceptible strains.