Table 6 Correlation coefficients between AChE inhibition of S. oryzae, R. dominica and P. interpunctella and the relative LC50 of asaricin 1, isoasarone 2, and trans-asarone 3.

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

AChE enzymes

Correlation coefficient of inhibitors

Asaricin 1

Isoasarone 2

Trans-asarone 3

S. oryzae

−0.920*

−0.946*

−0.866*

R. dominica

−0.859*

−0.910*

−0.833*

P. interpunctella

−0.953*

−0.938*

−0.863*

  1. *Represent the meaningful and negative correlation (p > 0.05).
  2. The de-attenuated correlation coefficient was calculated using \({\rm{r}}=\frac{{\bf{n}}({\rm{\Sigma }}{\bf{xy}})-({\rm{\Sigma }}{\bf{x}})({\rm{\Sigma }}{\bf{y}})}{[{\bf{n}}{\rm{\Sigma }}{{\bf{x}}}^{2}-({\rm{\Sigma }}{{\bf{x}}}^{2})[{\bf{n}}{\rm{\Sigma }}{{\bf{y}}}^{2}-({\rm{\Sigma }}{{\bf{y}}}^{2})]}\) x represents mean percentage of AChE inhibition, y represents relative LC95 of asaricin 1, isoasarone 2 and trans-asarone 3 against S. oryzae, R. dominica and P. interpunctella.
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