昆虫的预蛹是指老熟幼虫停止取食至脱皮成蛹之前的这个发育阶段。
预蛹和蛹不再取食，虫体隐藏在白色的半透明蜡壳内。
There are many wax glands which result in forming a turtle-like wax shell on the dorsal surface.
此外，放蜂地区的纬度及蜂的代次对预蛹的滞育亦有重要的影响。
In addition, the latitude of the area bees being released in and the generation of the bee also have an important influence on prepupae's diapause.
预蛹化蛹前一周血淋巴中蜕皮甾类激素滴度存在两个与变态相对应的峰值。
From about one week before pupation (the last instar) haemolymph ecdysteroid titres went up forming two separated peaks.
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