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Difficulty in inducing extra larval ecdysis in the silkworm, Bombyx mori, by repeated administration of ecdysone
The Journal of Sericultural Science of Japan
Induction of extra moults in 4th instar larvae of Bombyx mori by ecdysone or 20-OHecdysone applied by an oral or a haemolymph injection was examined and the results were compared with the effects of dietary application of ecdysone. Precocious ecdysis was effectively induced by the haemolymph and oral injection of ecdysone at doses of more than 5 and 10 ,ug/larva, respectively, to larvae on day 1 of the 4th instar. In case of 20-OH-ecdysone 2.5 ug for haemolymph injection and 10ug for oraldoi:10.11416/kontyushigen1930.64.156 fatcat:lbbwu5hek5axfng5npqxyqzp3e