Abstract
The daily liters of juvenile hormone and ecdysteroids were determined for workers of the Eastern subterranean termite Reticulitermes flavipes (Kollar) (Isoptera, Rhinotermitidae) following isolation of the workers from soldiers and reproductives. Experiments have demonstrated that isolation leads to biochemical and physiological changes that result in a presoldier molt. Juvenile hormone (JH) and molting hormone (MH) titers were determined in hemolymph samples using radioimmunoassay. The identity of the ecdysteroids as predominantly 20-hydroxyecdysone (90%) and ecdysone (10%) was determined by HPLC using pooled extracts of hemolymph.
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