Table 1 The refusal rate (FR) of target compounds against S. exigua at 0.50 mg/mL.

1

Propionyl

 < 30

21

4-Chlorobenzoyl

44.00 ± 0.19

2

Butyryl

36.57 ± 0.19

22

4-Bromobenzoyl

71.23 ± 0.03

3

2-Butenoyl

41.89 ± 0.10

23

4-Fluorobenzoyl

63.17 ± 0.12

4

Valeryl

 < 30

24

3-Bromobenzoyl

56.07 ± 0.01

5

Heptanoyl

53.75 ± 0.10

25

2-Bromobenzoyl

37.18 ± 0.14

6

Isobutyryl

 < 30

26

2-Fluorobenzoyl

37.31 ± 0.07

7

3,3-Dimethylbutyryl

 < 30

27

4-Chlorophenylacetyl

44.00 ± 0.11

8

Cyclohexylformyl

43.76 ± 0.12

28

2,5-Dichlorobenzoyl

45.58 ± 0.07

9

Cyclopropylformyl

44.14 ± 0.23

29

3,5-Difluorobenzoyl

53.05 ± 0.09

10

Palmitoyl

 < 30

30

2,4-Dichlorobenzoyl

 < 30

11

Propyl formyl

49.85 ± 0.17

31

2,3-Dichlorobenzoyl

39.30 ± 0.04

12

Butyl formyl

 < 30

32

2,4-Difluorobenzoyl

38.69 ± 0.15

13

n-Pentyl formyl

34.03 ± 0.25

33

thienoyl

90.20 ± 0.11

14

Isopropyl formyl

38.91 ± 0.22

34

2-Chlorothiophene formyl

51.84 ± 0.20

15

Isobutyl formyl

43.19 ± 0.13

35

tetrahydropyranoyl

 < 30

16

Benzoyl

46.17 ± 0.04

36

Nicotinyl

48.00 ± 0.10

17

Phenylacetyl

39.62 ± 0.03

37

8-OAc, 14-thienoyl

61.27 ± 0.12

18

Cinnamoyl

83.33 ± 0.02

38

8-OAc, 14-cinnamoyl

73.12 ± 0.08

19

3-Phenylpropionyl

 < 30

Chasmanthinine

90.07 ± 0.07

20

4-Methylbenzoyl

30.38 ± 0.07

Azadirachtin A

98.20 ± 1.29