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 6
Contact activity of acetone, propanol, ethanol, methanol, and aqueous extracts of B. ferruginea, B. sapida, and K. senegalensis determined by topical application to D. porcellus.
Plants
Solvent used
(µL/insect)
95% confidence interval
Slope ± SE
Intercept ± SE
Chi square (df)
value
Lower
Upper
B. ferruginea
Acetone
3.68
1.66
7.57
0.07 ± 0.02
−0.28 ± 0.15
36.32 (10)
0.000
Propanol
6.77
5.62
9.43
0.14 ± 0.02
−1.01 ± 0.16
29.35 (10)
0.001
Ethanol
1.53
1.16
4.48
−0.08 ± 0.02
0.13 ± 0.15
41.71 (10)
0.000
Methanol
34.73
9.03
51.14
0.01 ± 0.02
−0.34 ± 0.15
37.97 (10)
0.000
Distilled water
24.08
13.06
40.74
0.04 ± 0.03
−1.15 ± 0.18
16.30 (10)
0.091
B. sapida
Acetone
6.92
5.02
12.05
0.06 ± 0.02
−0.43 ± 0.15
89.18 (10)
0.000
Propanol
5.84
4.59
9.64
0.14 ± 0.02
−0.82 ± 0.15
60.42 (10)
0.000
Ethanol
11.97
7.96
38.25
0.05 ± 0.02
−0.59 ± 0.15
19.08 (10)
0.039
Methanol
6.72
5.43
10.16
0.08 ± 0.02
−0.60 ± 0.15
42.48 (10)
0.000
Distilled water
8.14
6.47
20.16
0.26 ± 0.03
−2.18 ± 0.21
75.11 (10)
0.000
K. senegalensis
Acetone
0.29
0.15
1.14
0.01 ± 0.02
−0.00 ± 0.15
37.37 (10)
0.000
Propanol
6.04
4.93
8.03
0.10 ± 0.02
−0.61 ± 0.15
53.54 (10)
0.000
Ethanol
3.84
1.38
6.56
0.04 ± 0.02
−0.17 ± 0.15
16.42 (10)
0.088
Methanol
10.47
7.67
29.46
0.06 ± 0.02
−0.70 ± 0.15
75.42 (10)
0.000
Distilled water
11.86
5.26
31.02
0.12 ± 0.03
−1.41 ± 0.18
69.57 (10)
0.000
LC50: lethal concentration 50. df: degrees of freedom.
