Development of spermiduct and seminal vesicle during pharate adult of the cabbage armyworm,Mamestra brassicae, (Lepidoptera; Noctuidae) |
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Authors: | TOSHIAKI SHIMIZU |
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Institution: | Department of Medical Entomology , The National Institute of Health , Kamiosaki, Shinagwa, Tokyo, 141, Japan |
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Abstract: | Summary Development of the upper vas deferens and seminal vesicle, and the ecdysteroid titers of the cabbage armyworm (Mamestra brassicae) during pharate adult stage were investigated to provide evidence of endogenous control of the sperm movement through the reproductive tract. Apparently, development of the upper vas deferens is initiated when ecdysteroid titers increase after pupation and continues until eclosion. Sperm movement correlates with the decrease of ecdysteroid titers. When ecdysteroid titers remained at low levels, sperm release from the testis was observed one day before eclosion. |
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Keywords: | spermduct seminal vesicle Mamestra brassicae ecdysteroid titer pharate adult |
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