不同温度下中国梨木虱的两性生命表

Two-sex life tables of Psylla chinensis(Hemiptera:Psyllidae)at different temperatures

【目的】明确温度对中国梨木虱Psylla chinensis生长发育和繁殖的影响。【方法】室内条件下,16、20、24、28、32和36℃分别测定中国梨木虱各阶段发育历期、产卵量和存活率等,制定其年龄-龄期两性生命表,利用两性生命表计算其存活率、繁殖力、寿命期望、繁殖值和种群参数。【结果】16-24℃,中国梨木虱随温度升高,其生长速度加快、发育历期缩短;24-32℃其发育历期变化不显著;36℃条件下不能完成整个生长发育。24℃时产卵量最高,为281.50粒/雌。16-24℃,中国梨木虱的年龄特征存活率、种群特定年龄净繁殖力、平均贡献度均随温度升高而增加,24-32℃,均随温度升高而下降。24℃处理的内禀增长率、周限增长率和净增值率均最高,28℃处理的平均世代周期最短。【结论】结果表明中国梨木虱生长发育和繁殖适宜温度为24-28℃。

[Aim]To determine the influence of temperature on the growth,development,and fecundity of Psylla chinensis.[Methods]In a controlled laboratory environment,the developmental period,oviposition rate,and survival rate of P.chinensis were measured at 16,20,24,28,32 and 36℃.An age-stage two-sex life table was constructed and used to determine the survival rate,fecundity,life expectancy,reproduction value,and population parameters of P.chinensis.[Results]Between 16-24℃,the growth rate of P.chinensis increased,whereas the developmental period decreased with increasing temperature.In contrast,temperatures between 24-32℃had no significant effect on the developmental period.At 36℃,the development of P.chinensis was inhibited.The highest number of eggs were produced at 24℃with 281.50 eggs per female.Between 16-24℃,the age-stage survival rate,population age-stage specific net reproductive rate,and the reproduction value increased with increasing temperature.However,they decreased as temperatures increase between 24-32℃.At 24℃,the intrinsic rate,net reproduction rate,and finite rate peaked,while the mean generation time reached a minimum value at 28℃.[Conclusion]Based on the findings of this study,the optimal temperature range for the growth and development of P.chinensis is 24-28℃.