Influence of three food plants,viz Memordica charantia, Luffa acutangula, andTrichosanthus anguina on the food utilization and chemical composition ofHenosepilachna septima has been studied. The rate of conversion and conversion efficiencies were higher inT. anguina fed beetles. The rate of conversion was positively correlated with the protein content of the food plants. The organic constituents ofH. septima specially protein and lipid increased when fed on the different food plants. Greater increase of all the organic constituents occurred when the insect was fed on the nutrient richT. anguina than when fed on other food plants.