亚洲玉米螟自然种群生命表的初步研究

STUDIES ON THE NATURAL POPULATION LIFE TABLE OF ASIAN CORN BORER

作者通过田间接种和一些辅助试验,组建了一、二代亚洲玉米螟(Ostrinia furnacalis)自然种群生命表。对有关种群数量变动的一些因子作了探讨,初步明确了影响亚洲玉米螟种群数量变动的主要因子。经过生命表分析得出,沈阳地区1990年一代亚洲玉米螟种群趋势指数(1)为2.6666,1991年为1.6558。通过存活曲线分析得出,亚洲玉米螟存活曲线属于 Pearl(1928)提山的Ⅱ型曲线,表明亚洲玉米螟种群消亡的主要阶段发生在生命的早期(卵至蛀前幼虫期),全世代存活率仅为1%左右。

Based on field inoculation treatments and some other auxiliary ex-periments,the natural population life tables of 1st and 2nd generations ofAsian corn dorer(ACB)Ostrinia furnacalis(Guenée)were established,Thetrend index of population(Ⅰ)of its 1st generation in Shenyang Region in1990 and 1991 were 2.6666 and 1.6558,respectively.Its survival curvewas consistent with the Pearl's Ⅲ-form(Pearl,1928),indicated thatthe population decrease is mainly at its early stages(egg-larva beforeboring).The survival of its whole generation was only around 1%.The key factors of its population dynamics was preliminarily explored.