Table 2 LC50 and LC95 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

LC50 (µg/mL) (95% C.I.)***

LC95 (µg/mL) (95% C.I.)***

F****

p

LC50 (µg/mL) (95% C.I.)***

LC95 (µg/mL) (95% C.I.)***

F****

p

LC50 (µg/mL) (95% C.I.)***

LC95 (µg/mL) (95% C.I.)***

F****

p

Asaricin 1

4.70 (3.6 to 5.6)

13.60 (10.5 to 21.6)

15.2

<0.05

10.60 (8.1 to 11.9)

18.60 (15.8 to 30.3)

8.4

<0.05

17.37 (13.4 to 20.3)

35.90 (29.1 to 57.1)

15.3

<0.05

Isoasarone 2

5.60 (4.5 to 6.6)

14.30 (11.5 to 20.8)

11.3

<0.05

8.70 (7.16 to 10.6)

28.10 (20.3 to 49.2)

10.8

<0.05

15.76 (12.4 to 19.1)

37.70 (29.1 to 61.5)

11.5

<0.05

Trans-asarone 3

258.90 (218.7 to 303.1)

670.20 (531.1 to 967.7)

25.0

<0.05

396.48 (328.1 to 474.7)

1283.56 (959.6 to 2072.3)

32.1

<0.05

432.42 (387.3 to 485.2)

1795.70 (1425.1 to 2444.6)

4.05

<0.05

  1. *Asaricin 1, isoasarone 2 and trans-asarone 3 represent phenylpropanoids isolated from P. sarmentosum hexane active fraction (F2).
  2. **Test performed on S. oryzae and R. dominica two weeks old adults and P. interpunctella third instar larvae.
  3. ***LC50 and LC95 values significant difference (p < 0.05) is based on non-overlap of the 95% confidence interval (C.I.).
  4. ****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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