摘要
[目的]明确紫薇绒蚧不同发育阶段的过冷却点和结冰点。[方法]采用数字万用电表和低温培养箱测定紫薇绒蚧1龄若虫、2龄若虫、蛹和雌成虫的过冷却点和结冰点。[结果]紫薇绒蚧不同发育阶段按过冷却点值由低到高依次为2龄若虫、蛹、雌成虫、1龄若虫,分别为(-22.62±0.16)、(-20.85±0.23)、(-17.53±0.22)、(-10.31±0.14)℃。体液结冰点也以2龄若虫最低,为(-22.12±0.21)℃;蛹次之,为(-19.43±0.22)℃;雌成虫、1龄若虫结冰点较高,分别为(-16.21±0.16)、(-9.93±0.15)℃。[结论]紫薇绒蚧的不同发育阶段过冷却点和结冰点均存在显著差异。
[Objective] Laboratory experiments were conducted to examine the super-cooling point and the freezing point for Eriococcus legerstroemiae. [Method] The supercooling points and freezing points at different stages of E. legerstroemiae were measured by digital multimeter and low temperature incubator. [Result] The supercooling point value of different stage of E. legerstroemiae from low to high were the second instar nymph,pupa,female adult and the first instar nymph in turn,with（-22. 62 ± 0. 16）,（-20. 85 ± 0. 23）,（-17. 53 ± 0. 22）,（-10. 31 ± 0. 14） ℃, respectively. Freezing points determined revealed that of the second instar nymph was the least, as（-22. 12 ± 0. 21） ℃; the secondary,（-19. 43 ± 0. 22） ℃,was the pupa. The female adult and the first instar nymph were last,as（-16. 21 ± 0. 16） and（-9. 93 ± 0. 15） ℃ respectively. [Conclusion] There is significant difference of the super-cooling point and the freezing point for E. legerstroemiae.
作者
冯聪慧
FENG Cong-hui(Sanmenxia Landscape Engineering Management Office, Sanmenxia, Henan 47200)
出处
《安徽农业科学》
CAS
2017年第17期129-130,共2页
Journal of Anhui Agricultural Sciences
关键词
紫薇绒蚧
抗寒性
过冷却点
Eriococcus legerstroemiae
Cold hardiness
Super-cooling point
