Isolation of Insecticidal Constituents from the Essential Oil of Ageratum houstonianum Mill. against Liposcelis bostrychophila Badonnel

Table 4

Repellency (PR) after two exposure times for Ageratum houstonianum essential oil and its isolated compounds against Liposcelis bostrychophila.

Treatment

2 hr (nL/cm^2)*

4 hr (nL/cm^2)*

6.4

3.2

1.6

0.8

6.4

3.2

1.6

0.8

Essential oil

93 ± 4^a

V

86 ± 9^a

V

82 ± 6^a

V

70 ± 8^ab

IV

86 ± 7^a

V

80 ± 6^a

V

71 ± 7^b

V

61 ± 6^b

IV

Precocene I

96 ± 5^a

V

87 ± 4^a

V

84 ± 7^a

V

74 ± 9^ab

IV

91 ± 4^a

V

81 ± 6^a

V

83 ± 5^a

V

70 ± 8^ab

IV

Precocene II

97 ± 5^a

V

85 ± 8^a

V

79 ± 8^a

IV

67 ± 7^b

IV

89 ± 9^a

V

82 ± 7^a

V

78 ± 5^ab

IV

63 ± 1^b

IV

Dimethyl phthalate

98 ± 4^a

V

91 ± 3^a

V

89 ± 4^a

V

81 ± 5^a

V

90 ± 4^a

V

85 ± 4^a

V

84 ± 4^a

V

77 ± 4^a

IV

∗Means in the same column followed by the same letters do not differ significantly (𝑃>0.05) in ANOVA and Tukey’s tests. PR was subjected to an arcsine square-root transformation before ANOVA and Tukey’s tests.