梨小食心虫滞育与非滞育幼虫过冷却能力与体内主要生化物质含量

The supercooling ability and biochemical substances in diapausing and nondiapausing larvae of Grapholitha molesta (Busck) (Lepidoptera: Tortricidae)

郭婷婷1,凌 飞3,张顺益1,于毅2,李丽莉2**,许永玉1

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作者单位：1.山东农业大学植物保护学院泰安271018；2.山东省农业科学院植物保护研究所济南250100；3. 山东日照国际海洋城投资有限公司建设管理部日照276800

中文关键词：梨小食心虫, 滞育, 自由水, 脂肪, 甘油, 海藻糖, 糖原, 蛋白质

英文关键词：Grapholitha molesta, diapauses, freewater, totalfat, glycerin, trehalose, glycogen, protein

中文摘要： 是我国北方果园中重要的果树害虫，现已成为泰安肥城桃园中为害最为严重的一种食心虫。本文主要测定了梨小食心虫滞育与非滞育幼虫的过冷却能力与体内主要生化物质的含量。研究结果表明；在26℃的温度条件下，滞育幼虫的过冷却点与结冰点均低于非滞育幼虫，但差异均不显著。滞育幼虫体内的含水量、糖原和蛋白质含量均极显著低于非滞育幼虫，但是滞育幼虫体内的总脂肪、甘油和海藻糖含量均极显著高于非滞育幼虫。研究结果说明，滞育幼虫在体内生理生化代谢做了调整，以应对不利环境条件的来临。

英文摘要： The oriental fruit moth, Grapholitha molesta (Busck), is an important pest of peach and other fruit crops in north China. Previous research found that this moth did the most serious harm to peach crops in Feicheng, Tai’an. In this paper, the supercooling ability and biochemical substances in diapausing and nondiapausing larvae of G. molesta were determined. The results show that, at a temperature of 26℃, the supercooling point (SCP) and freezing point (FP) of diapausing larvae were lower than those of nondiapausing larvae, but that this difference was not significant. The freewater, glycogen and protein content of diapausing larvae were significantly lower than in nondiapausing larvae, however totalfat, glycerin and trehalose in diapausing larvae were significantly higher than in nondiapausing larvae. These results indicate that diapausing larvae may adjust their biochemical processes to enhance resistance to colder temperatures.

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