Author(s): P. Jegajeevanram, N.M.I. Alhaji and S. Velavan
The insecticidal compounds of Mango ginger (Curcuma amada) rhizome and Tagetes erecta flowers were investigated using Gas Chromatogram/Mass spectral (GC-MS). The compounds found in the extracts were matched with the databases available in National Institute of Standards and Technology (NIST) library and were confirmed. The ethanolic extract of mango ginger rhizome was subjected to GC-MS analysis, which ensured the presence of twenty four compounds. Further, the analysis revealed the existence of β-Sitosterol (1.03%) and Androstan-17-one (93.67 %), 3-ethyl-3-hydroxy-, β-Sitosterol - these compounds are having insecticidal activities. Analysis of ethanol extract of Tagetes erecta flowers led to the identification of 13 active compounds, which include stigmasterol (6.78%), α-Sitosterol (5.26%), α-Amyrin (43.89%) and hexadecanoic acid ethyl ester (0.45%) and these compounds are having insecticidal activities. The present study demonstrates that Mango ginger rhizome and Tagetes erecta flower are having the potent insecticidal compounds.