钩纹皮蠹不同虫态过冷却点及结冰点的测定  

Supercooling points and freezing points at different stages of Dermestes ater De Geer

作　　者：段云博 吴海盼 郑霞林[1] 李俊[2] 陆温[1] DUAN Yunbo;WU Haipan;ZHENG Xialin;LI Jun;LU Wen(Guangxi Key Laboratory of Agri-Environmental and Agri-Product Safety,College of Agriculture, Guangxi University,Nanning　530004,China;National Demonstration Center for Experimental Plant Science Education,College of Agriculture,Guangxi University,Nanning　530004,China)

机构地区：[1]广西农业环境与农产品安全重点实验室培育基地,广西大学农学院,南宁530004 [2]植物科学国家级实验教学示范中心,广西大学农学院,南宁530004

出　　处：《植物保护》2018年第2期116-121,共6页Plant Protection

基　　金：国家现代农业产业技术体系广西柑橘产业创新团队项目(nycytxgcxtd-05-03);广西大学“大学生创新创业训练计划”项目(201610593241)

摘　　要：为初步明确钩纹皮蠹Dermestes ater De Geer不同虫态的抗寒能力,本文运用智能昆虫过冷却点测定仪及配套软件测定钩纹皮蠹幼虫、蛹和成虫的过冷却点及结冰点,比较不同虫态过冷却点和结冰点的差异,以期为钩纹皮蠹的越冬区划分、发生期预测和虫害防控等提供理论依据。结果表明,钩纹皮蠹3日龄蛹的平均过冷却点最低,为-24.31℃,1龄幼虫平均过冷却点最高,为-16.34℃,其余虫态平均过冷却点依次为老熟幼虫(-24.04℃)<5日龄蛹(-23.84℃)<1日龄蛹(-23.01℃)<7日龄蛹(-19.53℃)<7龄幼虫(-19.16℃)<5龄幼虫(-18.75℃)<3龄幼虫(-18.43℃)<成虫(-18.25℃);老熟幼虫的平均结冰点最低,为-18.41℃,5龄幼虫平均结冰点最高,为-10.84℃,其余虫态平均结冰点依次为3日龄蛹(-18.26℃)<1日龄蛹(-17.13℃)<5日龄蛹(-16.87℃)<1龄幼虫(-14.66℃)<成虫(-14.55℃)<7日龄蛹(-13.20℃)<3龄幼虫(-12.96℃)<7龄幼虫(-12.38℃)。钩纹皮蠹蛹和老熟幼虫有较强的抗寒能力,但幼虫和成虫的抗寒能力较弱。In order to determine the cold resistance of Dermestes ater De Geer,the intelligent insect supercooling point tester and the matching software were used to measure the supercooling point and freezing point of its larvae,pupae and adults,and the differences between the supercooling point and the freezing point of different insect states were compared,so as to provide a theoretical basis for division of overwintering areas,occurrence forecast and pest control.The results showed that the 3-day-old pupa had the lowest average supercooling point(-24.31℃);the first-instar larva had the highest average supercooling point(-16.34℃),and the average supercooling points of the other insect states were as followed:mature larva(-24.04℃)<5-day-old pupa(-23.84℃)<1-day-old pupa(-23.01℃)<7-day-old pupa(-19.53℃)<the seventh-instar larva(-19.16℃)<the fifth-instar larva(-18.75℃)<the third-instar larva(-18.43℃)<adult(-18.25℃).The mature larva had the lowest average freezing point(-18.41℃);the fifth-instar larva had the highest average freezing point of-10.84℃,and the average freezing points of the other insect states were as followed:3-day-old pupa(-18.26℃)<1-day-old pupa(-17.13℃)<5-day-old pupa(-16.87℃)<the first-instar larva(-14.66℃)<adult(-14.55℃)<7-day-old pupa(-13.20℃)<the third-instar larva(-12.96℃)<the seventh-instar larva(-12.38℃).The pupae and mature larvae showed stronger cold resistance,but the cold resistance of larvae and adults were weaker.

关 键 词：钩纹皮蠹 抗寒性 过冷却点 结冰点 

分 类 号：S433.5[农业科学—农业昆虫与害虫防治]