eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences August 2008 20 2 269 272 jusps-B 1298 article JAYA JAIN 1 Department of Chemistry, L.R.P.G. Colleg, Sahibbad, Ghaziabad, 201 005 (INDIA) <p style="text-align: justify;">India is veritable emporium of medicinal plants. A large number of different plant species contain natural pesticidal and medicinal value. The objective of this study was to determine the paradoxical nature of <em>M. spicata. </em>The studies have been undertaken on the life cycle, growth and mortality of<em> T. confusum</em> in rice grain. The survival rate of beetle is significantly reduced in the grain with increasing day and dose in extract of leaves of <em>M. spicata. </em>These plant extract was analyzed for certain trace metal viz. copper, zinc, manganese and iron. Concentrations of these metals in plant extract were iron (92 mg/g), copper (125 mg/g), zinc (122 mg/g) and manganese (31 mg/g).<br /> &nbsp;</p> https://ultraphysicalsciences.org/paper/1298/ M. spicata, T. confusum Zinc Copper, Iron