摘要
[目的]明确纺梭负蝗(Atractomorpha burri)种群的耐寒能力.[方法]利用过冷却点测定仪分别测定云南省曲靖市纺梭负蝗各虫态过冷却能力和低温条件下低龄和老龄若虫的存活率.[结果]不同虫态纺梭负蝗的过冷却点和结冰点差异显著(P<0.05),卵期过冷却点和结冰点最低,分别为-16.16、-8.13℃;3 龄若虫的过冷却点和结冰点最高,分别为-8.35、-5.20℃.雄性成虫的过冷却点和结冰点分别为-10.26、-7.18℃,低于雌性成虫的-9.00、-7.00℃.过冷却点和结冰点在同一虫态不同个体中的变异符合正态分布.3龄若虫和 5 龄若虫在低温条件下达到 50%以上死亡率的温度分别为-7.00、-9.00℃.[结论]纺梭负蝗卵期的耐寒性最强,5 龄若虫具有更强的低温耐受性,雄性成虫抗寒能力强于雌性成虫.
Abstract
[Objective]To clarify the cold tolerance of Atractomorpha burri population.[Methods]The supercooling capacity of each stage of Atractomorpha burri and the survival rate of young and old nymphs at low temperature conditions were determined by using the supercooling point tester in Qujing City,Yunnan Province.[Results]There were significant differences in the supercooling point and freezing point of different stages of Atractomorpha burri(P<0.05).The supercooling point and freezing point of egg stage were the lowest,which were-16.16,-8.13℃,respectively.The supercooling point and freezing point of the 3rd instar nymphs were the highest,which were-8.35,-5.20℃,respectively.The supercooling point and freezing point of male adults were-10.26,-7.18℃,respectively,which were lower than-9.00,-7.00℃of female adults.The variation of supercooling point and freezing point of different individuals in the same stage conformed to normal distribution.Under low temperature conditions,the temperature of more than 50%mortality of the 3rd and 5th instar nymphs was-7.00,-9.00℃,respectively.[Conclusion]The cold tolerance of the egg stage of Atractomorpha burri was the strongest,the 5th instar nymphs had stronger low temperature tolerance,and the cold resistance of male adults was stronger than that of female adults.
基金项目
云南省教育厅科学研究基金项目(2023J1038)
曲靖师范学院校级创新团队支持计划资助项目()
维普
万方数据