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在 2 5℃、相对湿度 80 %和日光照 14h的条件下 ,甜菜夜蛾的卵约经 71h孵化。根据其胚胎外形的发育特点 ,可将整个发育期分为 5个阶段 :早期发育阶段、胚带伸长阶段、胚胎缩短阶段、胚胎翻转及背合阶段、胚胎再伸长成熟阶段。其胚动过程可分为四个明显的阶段 :①胚带伸长与螺旋卷曲阶段 ;②胚体缩短与解螺旋阶段 ;③胚体翻转阶段 ;④胚胎再伸长与再螺旋阶段。
Under the conditions of 2 5 ℃, relative humidity 80% and sunlight 14h, the eggs of Spodoptera exigua hatched about 71h. According to the developmental characteristics of its embryo shape, the entire developmental period can be divided into five stages: early stage of development, stage of embryo elongation, stage of embryo shortening, stage of embryo turnover and back-mating, stage of embryo elongation and maturation again. The embryo moving process can be divided into four distinct stages: ① embryo elongation and spiral curl stage; ② embryo body shortening and unwinding spiral stage; ③ embryo body turning stage; ④ embryo re-elongation and re-spiral stage.