Abstract
The feeding preference of the brown planthopper, Nilaparvata lugens, for various untrient constituents of artificial diets were studied using a radioactive tracer. The fluid intake in N. lugens was markedly enhanced on 20% sucrose solution near neutrality. The acceptability of 20% sucrose solution was further improved when incorporated with 0.5-1.0% amino acids, 0.007-0.014% vitamins, 0.07% mineral salts (0.005% KH2PO4 and 0.02% MgCl2 or MgSO4), or 0.0035% metal sequestrenes.
