3 越冬幼虫体内含水量的变化采用60℃恒温烘干法测定越冬幼虫体内水分含量。
参考来源 - 桑螟越冬幼虫抗寒性及有效积温的研究The overwintering larvae started to move in early March of the following year. The mature larvae pupated from early April to late August.
次年3月上旬越冬幼虫开始活动,4月上旬开始化蛹,4月底5月初成虫开始羽化,有2个羽化盛期,分别在5月下旬和8月上旬。
参考来源 - 松黑木吉丁虫的成灾条件、机理及预防·2,447,543篇论文数据，部分数据来源于NoteExpress
在这种情况下越冬幼虫存活率高，成为下一年的虫源。
In this condition the overwintering larva survived with very high percentage and became the first source in coming year.
本文运用NTC-TD热敏电阻法测定了桑螟越冬幼虫的过冷却点、冰点。
NTC-TD heat-sensitive resistance is used to measure the super cooling-point (SCP)and freezing point of over-wintering larvae of Diaphania pyloalis;
越冬幼虫以“小分子糖—氨基酸—糖蛋白”物质系统形成抗寒基质，增强耐寒性。
So there is a substance system including "low molecular weight sugars-amino acid-glycoprotein" which enhances cold hardiness for overwintering larvae.
应用推荐