低温冷藏对智利小植绥螨存活和生殖力的影响

The Influence of the Survival Rate and Fecundity of P. persimilis at Different Low Temperatures

【目的】研究低温环境对智利小植绥螨存活和生殖力的影响，为智利小植绥螨人工繁殖以及在田间释放提供理论依据。【方法】采用室内和低温条件下冷藏观察的方法。【结果】智利小植绥螨短期冷藏的最适温度为6—9℃，长期冷藏最适温度为6℃。在0、3、6和9℃四个温度下冷藏5d后，对产卵量无太大影响。0℃下冷藏10d后产卵量下降，但在3、6和9℃三个温度下冷藏10d对智利小植绥螨的产卵量差异不显著，产卵数量随着冷藏时间的延长而略有增加；智利小植绥螨在0和9℃下冷藏15和20d后，其产卵量显著下降，在3和6℃下15和20d后冷藏对其产卵产生积极影响，产卵量略微上升。【结论】智利小植绥螨短期冷藏的最适温度为6—9℃，长期冷藏最适温度为6℃。

[ Objective] ：The purpose of the research focuses on the influence of the survival rate and fe- cundity of P. persimilis in different low temperatures in hope of providing theoretical and practical basis for the application of P. persimilis. [Method]The research was conducted under different low temperatures by the in- door observation. [ Result ] The research showed that the optimum temperature of short - term storage of P. persimilis was 6℃to 9℃, and the optimum temperature of long - term storage of P. persimilis was 6℃ to 9℃ . After cold storage at 0℃ and 3℃, 6℃ and 9℃ for 5 days ,there was no significant influence on the fecundi- ty. After cold storage at 0℃ for 10 days, the fecundity of P. persimilis was significantly influenced. But there was no significant influence on the fecundity at 3℃, 6℃ and 9℃. On the whole, the total fecundity was in- creased. The fecundity ofP. Persimilis was significantly decreased after cold storage at 0℃ and 9% for 15 and20 days, The fecundity of P. Persimilis was a little bit increased after cold storage at 3℃ and 6℃ for 15 and 20 days. [ Conclusion]The optimum temperature of long - term storage of P. Persimilis was 6℃ to 9℃ and the optimum degree of short - term storage of P. Persimilis was 6℃.