西宁地区农田瓢虫种类调查及横带瓢虫生物学特性的研究

Investigation on species of ladybirds in farmland and biological characteristics of Coccinella transversoguttata in Xining region

经调查,西宁地区农田瓢虫种类主要有横带瓢虫、二星瓢虫、孪斑瓢虫、多异瓢虫、横斑瓢虫、纵条瓢虫、异色瓢虫、七星瓢虫、十二斑菌瓢虫、龟纹瓢虫、菱斑巧瓢虫、十三星瓢虫共12种。其中优势种为横带瓢虫、二星瓢虫和孪斑瓢虫,分别占41 25%、27 90%和14 9%,其他种类占16 5%。

12main species of ladybirds were discovered in Xining region by investigation.Theywere Coc-cinella transversoguttata,Adalia bipunctata,Coccinella geminopunctata,Hippodamia variegate,Coccinella transversoguttata Faldermann,Coccinella longifasciata,Harmonia axyridis,Coccinella septempuntata,Vi-bidia duodecimguttata,Propylaea japonica,Oenpia conglobata,Hippodamia tredecimpunctata.The domi-nant species among12species were Coccinella transversoguttata,Coccinella geminopunctata and Hippo-damia variegate,the ratio of quantity of3species in all12species were41.25%,27.90%,14.90%,re-spectively,and the ratio of other species was16.5%.