Contact Toxicity and Repellency of the Essential Oil from Bupleurum bicaule Helm against Two Stored Product Insects
Table 4
Percent repellency (PR) of the essential oil from Bupleurum bicaule and its constituents against Liposcelis bostrychophila adults at 2 h and 4 h after exposure. Comparison of different samples at the same concentration, df = 5.
Times
Treatments
Concentrations (nL/cm2)
63.17
12.63
2.53
0.51
0.10
2 h
Essential oil
50 ± 12
56 ± 12
4 ± 17
24 ± 19
−6 ± 20
β-Bisabolene
76 ± 15
74 ± 15
42 ± 19
12 ± 18
18 ± 16
1,4-Dimethoxy-2-tert-butylbenzene
52 ± 19
8 ± 19
36 ± 13
22 ± 18
16 ± 13
Bornyl acetate
12 ± 14
20 ± 10
32 ± 9
10 ± 18
34 ± 16
(2E,4E)-2,4-Nonadienal
18 ± 20
74 ± 8
24 ± 18
20 ± 10
28 ± 14
DEET
100 ± 0
98 ± 2
78 ± 10
66 ± 8
8 ± 3
8.980
12.170
5.299
1.998
2.173
0
0
0.002
0.115
0.091
4 h
Essential oil
44 ± 13
48 ± 15
16 ± 10
36 ± 10
−10 ± 16a
β-Bisabolene
74 ± 22
64 ± 20
−16 ± 15
48 ± 20
16 ± 18
1,4-Dimethoxy-2-tert-butylbenzene
20 ± 15
28 ± 20
18 ± 16
30 ± 14
18 ± 18
Bornyl acetate
10 ± 19
24 ± 10
38 ± 12
22 ± 18
44 ± 18
(2E,4E)-2,4-Nonadienal
28 ± 8
36 ± 13
46 ± 7
14 ± 3
8 ± 20
DEET
96 ± 3
82 ± 5
68 ± 3
54 ± 6
22 ± 5
7.308
2.695
10.321
2.014
2.564
0
0.045
0
0.113
0.054
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.
