关键词: 白蜡虫阔柄跳小蜂, 温度, 实验种群, 生命表

Abstract: The development,survival and fecundity of experimental population of Metaphycus ericeri Xu et Jiang were observed,and the life tables of the experimental population were constructed at 18,21,24,27,30 and 33℃.The generation survival rate of M.ericeri was in order of 24℃>27℃>30℃>21℃>33℃>18℃>15℃,indicating that excessively high or low temperature is unfavorable to the survival and fecundity,and that the ovum numbers,oviposition numbers and oviposition percentage of the female adult at 24℃ and 27℃ are higher than at other temperature.The relationship of temperature and the survival rate of generation (S),population trend index (I),net reproduction of population (R 0) and innate capacity of natural increase (r^m) could be fitted by the parabola equation:y=a+bx+cx 2.S,I,R 0 and r^m reached their peaks respectively in 24～27℃,suggesting that 24～27℃ is the most suitable temperature range of the development,survival and fecundity of M.ericeri.The population density increased gradually (I>1,r^m>0),and the double time of population (t) was 15,16 and 23d respectively at 24,27 and 30℃.The population density kept stable (I≈1,r^m≈0) at 21℃.The population increased negatively (I<1,r^m<0) at 18℃ and 33℃,and M.ericeri could not reproduce its next generation at 15℃.

Key words: Metaphycus ericeri, Temperature, Experimental population, Life table