Journal of Mosquito Research 2015, Vol.5, No.10, 1-7
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Table 4 Mortality percent of different instars of
Culex quinquefasciatus
exposed to different concentrations of ethyl acetate root
extract of
Annona reticulata
(Mean mortality percent ±Standard error)
Instars
Concentrations (ppm)
Mortality % at different exposure periods
24 h
48 h
72 h
1
st
1
76.67±3.33
100.00±00.00
100.00±00.00
2
90.00±00.00
100.00±00.00
100.00±00.00
4
100.00±00.00
100.00±00.00
100.00±00.00
8
100.00±00.00
100.00±00.00
100.00±00.00
2
nd
1
63.33±3.33
83.33±3.33
100.00±00.00
2
83.33±3.33
100.00±00.00
100.00±00.00
4
100.00±00.00
100.00±00.00
100.00±00.00
8
100.00±00.00
100.00±00.00
100.00±00.00
3
rd
1
56.67±3.33
80.00±00.00
86.66±3.33
2
83.33±3.33
100.00±00.00
100.00±00.00
4
93.33±3.33
100.00±00.00
100.00±00.00
8
100.00±00.00
100.00±00.00
100.00±00.00
4
th
1
23.33±3.33
43.33±3.33
76.67±3.33
2
53.33±3.33
63.33±3.33
76.67±3.33
4
66.67±3.33
80.00±00.00
83.33±3.33
8
73.33±3.33
83.33±3.33
93.33±3.33
Table 5 Log probit and regression analyses of larvicidal activity of crude root extract of
Annona reticulata
against
different larval
instars of
Culex quinquefasciatus
Instars
Period (h)
LC
50
(ppm)
LC
90
(ppm)
Regression equations
R
2
- values
1
st
24
0.0071
0.0201
Y=6.70+76.67X
0.73
48
0.0064
0.0148
Y=7.80+53.33X
0.63
72
0.0074
0.0100
Y=9.20+20.00X
0.50
2
nd
24
0.0202
0.1068
Y=2.13+120.00X
0.92
48
0.0169
0.0826
Y=2.67+120.00X
0.88
72
0.0131
0.0440
Y=3.33+133.33X
0.93
3
rd
24
0.019
0.1062
Y=2.37+116.67X
0.89
48
0.0158
0.1012
Y=3.07+106.67X
0.88
72
0.0116
0.0590
Y=4.00+106.67X
0.84
4
th
24
0.0359
0.3610
Y=1.73+86.67X
0.89
48
0.0280
0.3474
Y=2.37+83.33X
0.88
72
0.0212
0.1822
Y=2.57+96.67X
0.88
LC = Lethal Concentration, R
2
= Co efficient of determination
Table 6 Log probit and regression analyses of larvicidal activity of ethyl acetate root extract of
Annona reticulata
against different
larval instars of
Culex quinquefasciatus
Instars
Period (h)
LC
50
(ppm)
LC
90
(ppm)
Regression equations
R
2
- values
1
st
24
0.5716
1.6832
Y=81.02+2.84X
0.63
48
-
-
-
-
72
-
-
-
-
2
nd
24
0.8246
2.1360
Y=69.71+4.52X
0.65
48
0.4585
1.2690
Y=89.85+1.59X
0.35
72
-
-
-
-
3
rd
24
0.8566
2.7904
Y=64.20+5.10X
0.69
48
0.5397
1.3747
Y=87.83+1.91X
0.35
72
0.3656
1.1339
Y=91.88+1.28X
0.59
4
th
24
2.3631
17.9815
Y=31.88+5.94X
0.68
48
1.1935
16.9890
Y=48.69+5.01X
0.72
72
0.3344
6.5305
Y=73.05+2.52X
0.98
LC = Lethal Concentration, R2 = Co efficient of determination
