昆虫的滞育是昆虫生理学理论上直到现在还没有很好解决的一个问题。家蚕是属于卵期滞育的昆虫,但是开始滞育的时期因蚕品种而有不同。在自然条件下一年中只有一个世代的品种,即这个世代所产的卯,当年不再孵化,须经过大约九个多月的卵期以后,在第二年的春天才完成胚胎发育。这种一年孵化一次的特性称为一化性,一年孵化一次的蚕品种,称一化性品种。现有的蚕品种除一化性品种外,还有一 Insect diapause is an issue that has not been well solved in insect physiology until now. Bombyx mori are insects belonging to the diapause period, but the period when the diapause begins is different due to the silkworm variety. Under natural conditions, only one generation in a year, namely, the dwarf produced by this generation, was no longer hatched in that year, and after about nine months of ovulation, embryo development was completed in the second spring. This characteristic of hatching once a year is called a one-off, hatched silkworm species once a year, and is called a selective species. In addition to a variety of existing varieties of silkworm, there is one