Repellent Effect and Insecticidal Activities of Bridelia ferruginea, Blighia sapida, and Khaya senegalensis Leaves Powders and Extracts against Dinoderus porcellus in Infested Dried Yam Chips
Table 7
Fumigant toxicity of acetone, propanol, ethanol, methanol, and aqueous extracts of B. ferruginea, B. sapida, and K. senegalensis on adult of D. porcellus after 24 h exposure.
Plants
Solvent used
(µL/L air)
95% confidence interval
Slope ± SE
Intercept ± SE
Chi square ()
value
Lower
Upper
B. ferruginea
Acetone
194.01
179.04
205.06
0.00 ± 0.03
−1.02 ± 0.18
100.19 (46)
0.000
—
Propanol
18.68
10.84
42.65
0.04 ± 0.03
−0.86 ± 0.16
241 (46)
0.000
10.38
Ethanol
28.45
13.36
91.98
0.06 ± 0.04
−1.77 ± 0.23
74.46 (46)
0.005
6.81
Methanol
82.28
72.94
108.59
0.01 ± 0.03
−1.24 ± 0.20
43.83 (46)
0.563
2.35
Distilled water
40.52
33.34
71.68
0.02 ± 0.03
−1.08 ± 0.19
62.51 (46)
0.053
4.78
B. sapida
Acetone
61.75
42.03
80.02
0.02 ± 0.04
−1.46 ± 0.21
50.88 (46)
0.287
3.14
Propanol
55.90
49.26
68.80
0.01 ± 0.03
−0.61 ± 0.16
168.77 (46)
0.000
3.47
Ethanol
180.11
165.74
200.55
0.00 ± 0.03
−1.36 ± 0.21
64.26 (46)
0.039
1.07
Methanol
34.28
21.90
51.62
0.00 ± 0.04
−1.37 ± 0.21
66.53 (46)
0.025
5.65
Distilled water
96.05
80.28
115.33
0.01 ± 0.03
−1.34 ± 0.20
82.63 (46)
0.001
2.01
K. senegalensis
Acetone
100.38
85.56
119.39
0.01 ± 0.03
−1.24 ± 0.19
70.63 (46)
0.011
1.93
Propanol
5.40
5.29
6.28
0.06 ± 0.03
−0.32 ± 0.16
190.69 (46)
0.000
35.92
Ethanol
39.24
22.53
70.12
0.04 ± 0.04
−1.87 ± 0.26
43.36 (46)
0.583
4.93
Methanol
73.61
64.19
101.25
0.01 ± 0.04
−1.39 ± 0.22
40.41 (46)
0.705
2.63
Distilled water
150.85
135.78
171.63
0.01 ± 0.04
−1.60 ± 0.24
27.26 (46)
0.987
1.28
LC50: lethal concentration 50. df: degrees of freedom. TR50: toxicity ratio 50.
