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 2
Mortality of adult D. porcellus and weight loss (mean ± SE) of yam chips treated with varying concentration of B. ferruginea, B. sapida, and K. senegalensis crude powders in 21 days after infestation. Mortality rate was corrected using Abbott’s formula (4).
Treatments
Concentration (% w/w)
Percentage of mortality rate after different periods of exposures (days)
Weight loss (g)
1
3
5
7
14
21
Antouka
0.05
29.4 ± 9.9
79.1 ± 1.3
96.8 ± 3.1
100.0 ± 0.0
100.0 ± 0.0
100.0 ± 0.0
0.0 ± 0.0
B. ferruginea
2.0
1.2 ± 2.4
0.0 ± 0.0
0.0 ± 0.0
0.0 ± 0.0
5.3 ± 20.1
8.3 ± 26.4
3.0 ± 0.4
4.0
0.0 ± 0.0
0.0 ± 0.0
0.0 ± 0.0
1.7 ± 15.8
12.5 ± 21.5
8.3 ± 29.5
2.0 ± 0.7
6.0
1.2 ± 2.4
0.0 ± 0.0
0.0 ± 0.0
0.0 ± 0.0
10.7 ± 10.3
18.7 ± 18.1
2.9 ± 0.7
8.0
2.5 ± 2.0
2.7 ± 4.8
0.0 ± 5.3
3.4 ± 2.8
32.1 ± 12.2
41.7 ± 14.8
2.3 ± 0.6
10.0
1.8 ± 3.8
0.0 ± 0.0
0.0 ± 4.4
1.7 ± 1.7
17.8 ± 8.5
29.2 ± 15.4
2.7 ± 0.6
B. sapida
2.0
6.4 ± 2.4
8.3 ± 6.6
10.9 ± 10.3
15.5 ± 17.0
33.9 ± 19.9
27.1 ± 24.6
0.4 ± 0.1
4.0
11.5 ± 3.8
11.1 ± 3.9
20.3 ± 8.2
25.9 ± 10.3
37.5 ± 17.1
43.7 ± 21.3
1.9 ± 0.9
6.0
11.5 ± 2.4
19.4 ± 5.3
15.6 ± 5.9
15.5 ± 7.1
26.8 ± 6.3
22.9 ± 10.4
4.1 ± 1.6
8.0
2.5 ± 2.0
2.7 ± 1.6
1.5 ± 1.5
1.7 ± 8.6
21.4 ± 17.7
25.0 ± 22.0
4.1 ± 1.9
10.0
1.2 ± 1.2
0.0 ± 2.2
4.6 ± 4.6
13.7 ± 4.4
28.5 ± 5.0
27.0 ± 7.8
4.1 ± 2.0
K. senegalensis
2.0
2.5 ± 2.9
1.3 ± 7.3
0.0 ± 10.2
0.0 ± 8.8
10.7 ± 21.1
0.0 ± 26.6
3.6 ± 2.0
4.0
1.2 ± 1.2
0.0 ± 0.0
0.0 ± 0.0
0.0 ± 0.0
5.3 ± 15.3
4.1 ± 21.7
1.5 ± 0.5
6.0
2.5 ± 5.1
0.0 ± 0.0
0.0 ± 0.0
0.0 ± 11.5
10.7 ± 19.0
10.4 ± 24.2
2.6 ± 1.2
8.0
10.2 ± 7.4
11.1 ± 9.8
3.1 ± 11.0
0.0 ± 13.2
8.9 ± 25.3
4.1 ± 33.1
6.4 ± 2.2
10.0
0.0 ± 1.3
0.0 ± 0.0
0.0 ± 0.0
6.9 ± 1.9
16.0 ± 3.4
22.9 ± 10.4
3.9 ± 1.7
Control
0
2.5 ± 1.4
10.0 ± 2.8
20.0 ± 6.1
27.5 ± 2.5
30.0 ± 2.0
40.0 ± 3.5
6.7 ± 1.1
Means in a column followed by different letters are significantly different at α = 0.05.
