Figure 2. Vitellogenin and lipophorin titers in the hemolymph of last instar nymphs of Leucophaea maderae following the application of 200µg methoprene at the days indicated. The animals were bled 6 days after the methoprene application and the amounts of vitellogenin and lipophorin were determined in aliquots of the hemolymph by rocket immunoelectrophoresis. The metamorphic molt occured on average on day 38 of the last instar. Columns represent the averages SE of the mean of the number of animals indicated above the columns.