This study was carried out in order to obtain clear knowledge about the effects of Aspsulphueus which is parasitic on the bean paste ball, meju, made to brew soy sauce and bean paste for domestic uses in the general silkworm rearing farmhouseholds in Korea. The major research carried by the author during the past five years (1965-58) includes, 1) the cause of disease, 2) symptoms, 3) morphological and chemical changes of the larval body tissues and 4) methods to prevent the contagion of the disease.