摘要
红脂大小蠹DendroctonusvalensLeconte大面积为害油松 ,造成健康油松大量死亡 ,在我国尚属首次。选用定点观察和线路踏查相结合的方法 ,从 1999年到 2 0 0 1年 5月 ,对该虫为害油松进行了详细调查。胸径 10cm以上的油松受害较重 ,且胸径越粗受害越重。最细 3cm的油松也受害 ,有虫株率 5 %～ 11% ,最高达 4 0 % ,受害株死亡率 3 6 % ,最高达 38%。以成虫侵入干基 70cm段集中为害 ,高达 180cm。侵入孔流出凝脂。在干部越冬的成虫和幼虫 ,越冬后死亡。该虫也为害根部 ,在根部同样可以产卵并发育为成虫 ,能正常越冬 。
The result of spot observation and line survey from 1999 to 2001 showed that Dendroctonus valens attacked Pinus tabulaeformis with breast height diameters above 3cm.The thicker the trunk the more serious was the damage.The attacking rate was 5%～11% and the mortality of infected trees was 3 6%.The adults intruded into butts mainly at the height of 70cm.The adults and larvae overwintering on trunks died after the period.The pest also attacked roots and could oviposit,develop into adults,and overwinter on roots and spread.
出处
《中国森林病虫》
北大核心
2002年第3期38-41,共4页
Forest Pest and Disease
关键词
油松
红脂大小蠹
越冬
Pinus tabulaeformis
Dendroctonus valens
overwinter
