Table 3 LT50 and LT95 of asaricin 1, isoasarone 2, and trans-asarone 3 against S. oryzae, R. dominica and P. interpunctella after 72 hours exposure.

From: Insecticidal activity and the mechanism of action of three phenylpropanoids isolated from the roots of Piper sarmentosum Roxb

Compounds

Tested Insects*

S. oryzae

R. dominica

P. interpunctella

LT50 (hours) (95% C.I.)**

LT95 (hours) (95% C.I.)**

F***

p

LT50 (hours)(95% C.I.)**

LT95 (hours)(95% C.I.)**

F***

p

LT50 (hours) (95% C.I.)**

LT95 (hours) (95% C.I.)**

F***

p

Asaricin 1

15.7 (8.6 to 19.6)

34.2 (22.5 to 51.2)

7.8

<0.05

18.4 (11.1 to 27.8)

39.8 (29.8 to 57.7)

12.1

<0.05

46.9 (28.7 to 62.2)

91.5 (63.1 to 167.3)

9.9

<0.05

Isoasarone 2

17.3 (9.5 to 23.4)

39.3 (27.3 to 56.8)

12.8

<0.05

19.6 (11.2 to 28.6)

48.3 (31.2 to 61.5)

10.5

<0.05

45.3 (34.4 to 51.8)

88.1 (69.6 to 159.6)

13.2

<0.05

Trans-asarone 3

38.9 (28.8 to 43.5)

79.2 (58.2 to 103.4)

28.4

<0.05

48.7 (31.6 to 57.2)

88.9 (68.9 to 129.2)

30.3

<0.05

52.7 (39.4 to 82.9)

92.7 (88.1 to 134.9)

18.8

<0.05

  1. *Test performed on S. oryzae and R. dominica two weeks old adults and P. interpunctella their instar larvae.
  2. **LT50 and LT95 values significant difference (p < 0.05) is based on non-overlap of the 95% C.I.
  3. ***Since Chi square goodness of fit test is not significant (p > 0.15), no heterogeneity factor is used in the calculation of fiducial limits.
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