Contact Toxicity and Repellency of the Essential Oil from Bupleurum bicaule Helm against Two Stored Product Insects
Table 3
Percent repellency (PR) of the essential oil from Bupleurum bicaule and its constituents against Lasioderma serricorne adults at 2 h and 4 h after exposure. Comparison of different samples at the same concentration, df = 5.
Times
Treatments
Concentrations (nL/cm2)
78.63
15.73
3.15
0.63
0.13
2 h
Essential oil
100 ± 0
74 ± 12
70 ± 12
66 ± 11
38 ± 4
-Bisabolene
90 ± 6
12 ± 9
34 ± 15
10 ± 16
56 ± 12
1,4-Dimethoxy-2-tert-butylbenzene
62 ± 11
40 ± 13
34 ± 15
6 ± 12
14 ± 12
Bornyl acetate
74 ± 12
−28 ± 19
−4 ± 17
−4 ± 9
−36 ± 17
(2E,4E)-2,4-Nonadienal
56 ± 12
66 ± 20
4 ± 19
16 ± 17
60 ± 10
DEET
88 ± 7
76 ± 14
28 ± 7
20 ± 14
16 ± 7
15.878
20.895
9.823
5.244
39.261
0
0
0
0.002
0
4 h
Essential oil
100 ± 0
62 ± 15
24 ± 19
28 ± 19
12 ± 18
β-Bisabolene
88 ± 12
26 ± 17
24 ± 11
14 ± 17
34 ± 18
1,4-Dimethoxy-2-tert-butylbenzene
46 ± 20
32 ± 9
34 ± 17
−4 ± 16
28 ± 4
Bornyl acetate
68 ± 13
−4 ± 12
14 ± 12
−8 ± 18
−18 ± 11
(2E,4E)-2,4-Nonadienal
50 ± 19
72 ± 9
12 ± 18
−14 ± 16
32 ± 19
DEET
98 ± 2
78 ± 9
58 ± 16
56 ± 14
46 ± 7
15.428
17.091
2.713
5.753
13.079
0
0
0.044
0.001
0
Different letters in the same column (2 h and 4 h, resp.) mean significant differences () in ANOVA and Tukey’s tests. PR was subjected to an arcsine square-root transformation before analysis.
