[Physiologically active substances in the oral excreta produced by honey bee--effects of royal jelly on silkworm].

The effect of royal jelly on the growth, development, weight of a cocoon and the number of eggs of the silkworm, Bombyx mori, was tested by the use of artificial diets. The growth and developmental speed of the silkworm were quickened by addition of royal jelly. The number of eggs increased markedly by the feeding of raw royal jelly but not of boiled royal jelly.