郴州烟区害虫天敌资源的初步调查

A preliminary investigation on the resources of natural enemies against tobacco pests in Chenzhou

通过2005、2006年对郴州烟区烟草害虫天敌资源的初步调查,共采获烟草害虫天敌约70种,其中已鉴定到种的有46种,包括寄生性天敌7种,捕食性天敌39种;在害虫发生盛期,烟蚜茧蜂的田间最高寄生率达40.3%,棉铃虫齿唇姬蜂寄生于烟青虫、棉铃虫的田间最高寄生率达75.0%,2006年黄花烟93-1上的烟青虫、棉铃虫被此蜂寄生的高达90.5%。

The resources of natural enemies against tobacco pests were investigated in Chenzhou, Hunan, during 2005--2006. More than 70 species of natural enemies were found, among which 46 species were identified, including 7 species of parasitic natural enemies and 39 species of predacious ones. During the peak time, the highest parasitic rate of Aphidius gifuensis Ashmead was 40.3% in the field, and the highest rate of Campoletis chlorideae Uehida parasitizing Helicoverpa assulta Guen6e and H. armigera Hvbner was 75.0% in the field, while that of C. chlorideae parasitizing H. assulta and H. armigera on yellow flower tobacco 93-1 was 90.5% in 2006. It is evident that the natural enemies play a role in controlling tobacco pests.