THE EFFECTS OF ACORUS CALAMUS LINN. AND STEMONA TUBEROSE LOUR. EXTRACTS ON THE INSECT PEST, PLUTELLA XYLOSTELLA (LINNAEUS)

The effects of Stemona tuberose Lour. and Acorus calamus Linn. ethanol extracts on the Diamondback Moth, Plutella xylostella (Linnaeus) was investigated.
It was found that a 0.4 % A. calamus extract and 0.5 % S. tuberose extract had the best activity against third-instar larvae of P. xylostella by the leaf dipping method.
At this concentration A. calamus extract gave 63.3 % accumulated mortality with 23.33 mm² feeding sites per larva within 48 hours.
Whereas S. tuberose extract gave 53.3 % accumulated mortality, significantly with 3.67 mm² feeding sites per larva within 72 hours.
The study of the insecticidal substances from both plants revealed that the dichloromethane extracts exhibited a pronounced insecticidal activity by topical application to the third-instar larvae of P. xylostella. The fractionated compounds by TLC were tested for insecticidal activity.
The R_f 0.49 band of the A. calamus extract showed 100 % accumulated mortality in 24 hours and the R_f 0.31 band of S. tuberosa extract 62.5 % in 72 hours.
The structures of the active fractions are being identified.

International Conference on Medicinal and Aromatic Plants (Part II)

T. Jiyavorranant, Y. Chanbang, D. Supyen, S. Sonthichai, A. Jatisatienr

Sweet flag, bioinsecticide

https://doi.org/10.17660/ActaHortic.2003.597.32