发育起点温度：由于变温动物的生长发育有一定的温度范围，低于某一温度时，生长发育便停止，高于此温度时，生长发育才开始进行。
发育起点温度及有效积温因不同龄期均有差异。
Development thresholds and accumulated temperatures vary owing to different instars.
在实验室条件下，对麦蛾茧蜂各虫态的发育起点温度与有效积温进行研究。
In the present paper the development zero and effective accumulated temperature of Habrobracon hebetor (Say) were studied.
世代分化现象，测定了卵期、幼虫和蛹期及全世代的发育起点温度和有效积温。
The generation differentiation and the development initial temperatures and effective accumulated temperatures for egg, larva and pupa and whole generation of A.
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