烟地节肢动物群落研究

The Study of the Athropod Community in Tabacco Field

本文根据田间系统调查所获材料对烟地节肢动物群落的动态进行分析。已鉴定出的种类分属于昆虫、蜘蛛、螨类及多足纲等类群共７９种。其中植食性昆虫以蚜虫为优势种·捕食性天敌以蜘蛛类群的拟环纹狼蛛、拟水狼蛛、草间小黑蛛及食虫瘤胸蛛为优势种，寄生性无敌种类单一，以烟蚜茧蜂为主。在烟草的不同生育期，物种丰富度、多样性指数、均匀性指数及个体密度都有一定程度的差异，存在从烟苗期到成熟期上升的趋势。杀虫剂的使用与烟地节肢动物群落的结构与动态有较密切的关系。

The dy namics of the athropod commun ity are a nalyzed in this paper by the data gottenfrom the systematic investigation in tabacco fields.79 kinds of insects and splders have been iden-ti fied by the specimen collected during the field in vestigation. The aphid(Myzus persicae)was thedominant in phytophagus,the wolf spiders( Plrata subpiratus, Lycosa pseudopuntatuta),the dwarf spi-ders (Oedothorax insecticeps, Erigonidium graminicolum )in the predator,the aphid wasp(Ahipius gifuen-sis)in parasite. As the tabacco gro、vth, in different fields the trend of the index of biocommunitywas different also.In the slope land new cultivated as the tabacco growth the population densityof the aphid increased and the indeces of Speices richness, diversity and eveness decreased.Becauseof the application of the insecticides in the Seed breeding ficld the indeces of the species richness,diversity and eveness increased.The other fields were located between these two cases,It was ob-vious that there was a closed relationship between the application of insecticides and the dynamicsof the index of biocommunity.