Transovarial transmission is the main cause for infecting silkworm pebrine. Mother moth inspection is the most popular way to control and prevent silkworm pebrine. The technique of mother moth inspection was improved gradually during production practice, and excellent result had been achieved. The rate of germination transmission of silkworm pebrine is a main factor to influence the inspection technique of commercial silkworm eggs. Moreover, the silkworm variety, infecting time and the extension of the mot...