摘要
Abstract
[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.关键词
紫薇绒蚧/抗寒性/过冷却点Key words
Eriococcus legerstroemiae/Cold hardiness/Super-cooling point分类
农业科技
