华山松木蠹象自然种群的生命表

华山松木蠹象Pissodes punctatus Langor et Zhang在云南分布广泛,在曲靖市国营海寨林场对华山松的危害面积达6670hm2。在该林场连续6年对该虫的自然种群消长规律进行研究,将华山松木蠹象的生长发育过程分为卵期、1期幼虫期、2期幼虫期、蛹期、成虫期5个阶段。通过林间观察及室内饲养,得到该虫自然种群生命表。并通过回归分析,得到该虫消亡的关键因子主要为2期幼虫和蛹期的白僵菌,其次为2期幼虫和蛹期寄生蜂。

Life tables of natural population of Pissodes punctatus

Pissodes punctatus Langor et Zhang is widely distributed in Yunnan,and the area of damaged Pinus armandii forest is about 6 670 hm2 in Haizhai state-owned forest farms in Qujing.Through the six-year research of the natural population dynamics,the development process of the beetles was divided into five stages,i.e.egg stage,first larval stage,second larval stage,pupa stage and adult stage.Through the field observation and rearing in laboratory,life table of natural population was constructed.Through regression analysis,the main key factor of population dynamics was Beauveria bassiana in second larval and pupa stage,and the second key factors was the parasitic wasps.