Oil Conc.

M. piperta

C. citratus

O. magoranum

T. vulgaris

Negative control

5 μl/20 ml

15.6 ± 0.5

22.0 ± 0.6

24.5 ± 0.4

26.0 ± 0.41

50.3 ± 0.2

10 μl/20 ml

11.4 ± 0.45

16.3 ± 0.5

17.7 ± 0.31

18.3 ± 0.37

50.3 ± 0.2

15 μl/20 ml

5.0 ± 0.15

12.2 ± 0.34

13.9 ± 0.56

14.5 ± 0.36

50.3 ± 0.2

20 μl/20 ml

TI

10.7 ± 0.32

12.3 ± 0.12

12.8 ± 0.24

50.3 ± 0.2

40 μl/20 ml

TI

TI

TI

TI

50.3 ± 0.2