Journal of Mosquito Research 2015, Vol.5, No.19, 1-7
4
Table 2 Percent mortality of different instars of
Cx. quinquefasciatus
exposed to different concentrations of ethanol leaf extract of
A.
reticulata
(Mean mortality percent±standard error).
Instar
Conc( ppm )
%Mortality (+SE) at different exposure periods
24h
48h
72h
1
st
1.5
86.66±3.33
86.66±3.33
100.0±00.0
3.0
90.00±5.88
93.33±3.33
100.0±00.0
6.0
100.0±00.0
100.0±00.0
100.0±00.0
12.0
100.0±00.0
100.0±00.0
100.0±00.0
18.0
100.0±00.0
100.0±00.0
100.0±00.0
2
nd
1.5
26.66±3.33
60.00±5.78
83.33±3.33
3.0
36.66±3.33
83.33±8.88
90.00±5.8
6.0
83.33±3.33
93.33±3.33
100.0±00.0
12.0
100.0±00.0
100.0±00.0
100.0±00.0
18.0
100.0±00.0
100.0±00.0
100.0±00.0
3
rd
1.5
10.00±5.78
43.33±3.33
70.00±5.78
3.0
23.33±3.33
76.66±3.33
86.66±3.33
6.0
63.33±3.33
96.66±3.33
100.0±00.0
12
100.0±00.0
100.0±00.0
100.0±00.0
18.0
100.0±00.0
100.0±00.0
100.0±00.0
4
th
1.5
6.66±3.33
16.66±3.33
26.66±3.33
3.0
16.66±3.33
43.33±3.33
63.33±8.88
6.0
33.33±3.33
56.66±3.33
90.00±5.78
12.0
80.00±5.78
96.66±3.33
100.0±00.0
18.0
100.0±00.0
100.0±00.0
100.0±00.0
Note: Control No mortality (For all instars)
Table 3 Log probit and regression analyses of larvicidal activity of ethanol leaf extract of
A.reticulata
against different larval instar
s
of
A. aegypti
Larval instar
Exposure period (h)
LC
50
(ppm)
LC
90
(ppm)
Regression equation
R
2
value
1
st
24
6.8839
23.3961
Y= 6.6104 +4.1911 X
0.9256
48
3.0721
11.7153
Y= 39.8459 + 2.9598 X
0.8442
72
2.3550
8.3395
Y= 50.6641 + 2.5219 X
0.7409
2
nd
24
5.9929
24.4299
Y= 17.6836 +3.5229 X
0.9271
48
4.2606
19.7103
Y= 29.6945 +3.1290 X
0.8944
72
2.9057
13.5762
Y= 42.4162 + 2.7207X
0.8348
3
rd
24
14.5745
106.0827
Y= 7.9499 +2.5676 X
0.9865
48
6.5972
55.2839
Y= 25.4283 +2.4923 X
0.8511
72
4.1226
33.5766
Y= 34.9844 + 2.4818 X
0.8565
4
th
24
19.8836
28.8044
Y= -14.2149 + 3.1310 X
0.8342
48
19.4130
27.7418
Y=- 14.9512 + 3.3029X
0.8332
72
18.3592
25.0146
Y= -17.0594 + 3.7575 X
0.8343
Note: LC =Lethal Concentration, X= Concentration, Y= mortality, R2 = Coefficient of determination
