摘要
通过野外采集寄主虫瘿进行室内饲养观察与适时林间采集虫瘿进行解剖分析，研究瘿孔象刻腹小蜂的生物学及其与寄主的关系。结果表明：瘿孔象刻腹小蜂在山东济南与北京两地均1年发生2代，以幼虫单个外寄生于赵氏瘿孔象4～5龄幼虫，以老熟幼虫在虫瘿内被其杀死的寄主尸体旁越冬，翌年5月下旬成虫羽化寻找新的虫瘿进行产卵。其整个生活史均在虫瘿内完成。在山东济南的寄生率为13．7％，在北京仅第2代寄生率达30．7％。而且，因其寄主赵氏瘿孔象1年只发生1代，瘿孔象可连续寄生2次寄主幼虫，对赵氏瘿孔象的种群数量具明显的抑制作用，是生物防治这种害虫的优势天敌。
Ormyrus coccotori （Hymenoptera： Ormyridae） is a parasitoid of gall-making weevil Coccotorus chaoi （Coleoptera： Curculionidae） feeding on young twigs of bunge hackbreey tree. Its biology and relationship with the host were observed in lab and woods. The results showed that the species is a single ecto-parasitoid of mature larva of the gall-making weevil. It developed two generations per year, and overwintered as mature larva inside the host gall, pupated in later May next year. The whole life history accomplished in the gall. Its parasitism rate was 13.7 % in Shandong totally, and in Beijing it was 30.7 % in the second generation. Meanwhile, the parasitoid was two generations while its host only one generation per year, i.e. it can parasitize twice one generation larvae of the host weevil. So one may say that the parasitoid play an important role to control the population of the weevil, and it is a dominant natural enemy agent for biological control the insect pest.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2007年第10期83-86,共4页
Scientia Silvae Sinicae
基金
国家自然科学基金项目(39470578)
关键词
瘿孔象刻腹小蜂
生物学
赵氏瘿孔象
寄生关系
控制作用
Ormyrus coccotori
biology
Coccotorus chaoi
parasitism relationship
biological control
