Carbohydrate turnover in relation to trehalase activity in the eri-silkworm, Philosamia ricini, during embryogenesis.

Total sugar content with a higher level than glucose and trehalose presents a sharp increase in the late days of embryonic development in the eri-silkworm, whereas glucose and trehalose levels correspond to trehalase activity which increase in the early and late days associated with an intensive synthetic activity.