Abstract: [Objective] This research aims to measure the amount of body water, fat, total sugar, protein, glycogen content and trehalase activity of male and female adults of Lygus pratensis (L.) in non-overwintering period and overwintering period in order to explore the changes of content of non-overwintering stage and wintering period Lygus pratensis(L.) biochemical substances so that a better understanding of its overwintering mechanism will be obtained in the hope of providing theoretical basis for integrated control of Lygus pratensis (L.).[Method]The change law of cold resistance of Lygus pratensis(L.) was studied by acquiring female and male adults of Lygus pratensis (L.) at different developmental stages and determinating biochemical matter contents.[Result]From non-wintering period to overwintering period, the Lygus pratensis (L.) adult body fat content increased gradually and tended to be stable, total sugar content and glycogen content firstly increased and then decreased, the protein content decreased first and then increased, but the trehalase activity rose at first and after that period, it began to fall down.[Conclusion]There is a certain connection between cold hardiness and dynamic change of biochemical matter contents of Lygus pratensis (L.) adults during non-winterring period and overwinterring period, which implies the ecological adaptability to such changes as light and temperature.

摘要： [目的]测定牧草盲蝽Lygus pratensis(L.)雌雄成虫非越冬期及越冬期体内含水量、脂肪、总糖、蛋白质、糖原等含量及海藻糖酶比活力,研究非越冬期及越冬期牧草盲蝽体内生化物质的含量变化,了解牧草盲蝽的越冬机理.[方法]采集不同时期牧草盲蝽雌雄成虫,运用分光光度测定法测定其体内不同时期生化物质含量动态变化.[结果]从非越冬期到越冬期,牧草盲蝽成虫体内脂肪含量逐渐增加并趋于稳定,总糖、糖原含量先增加后减少,蛋白质含量先减少后增加,海藻糖酶比活力先增强后逐渐减弱.[结论]牧草盲蝽越冬期和非越冬期成虫体内生化物质含量变化与其抗寒能力存在一定的联系,是其对冬季光照、温度等变化的生态适应.