Department of Entomology, College of Resources and Environment, South China Agricultural University, Guangzhou 510642, The People's Republic of China.
J Insect Sci. 2010;10:10. doi: 10.1673/031.010.1001.
Both Microplitis prodeniae Rao and Chandry (Hymenoptera: Bracondidae) and Campoletis chlorideae Uchida (Hymenoptera: Ichnumonidae) are major parasitoids of Spodoptera litura (Fabricious) (Lepidoptera: Noctuidae) in tobacco, Nicotiana tabacum L. (Solanales: Solanaceae) at Nanxiong, Guangdong Province, South China. The niches and interspecific competition relationships of the two species were studied. The results show that the competition between the two species for spatial and food resources was very intense, and C. chlorideae was always dominant when the two species compete for spatial and food resources in different periods. Thus C. chlorideae may drive M. prodeniae away when they occupy the same spatial or food resource. The adaptability of C. chlorideae to the environment in the tobacco fields may be greater than that of M. prodeniae, so C. chlorideae can maintain a higher population compared to that of M. prodeniae.
两种寄生蜂，菜蛾盘绒茧蜂（膜翅目：盘绒茧蜂科）和草蛉绒茧蜂（膜翅目：绒茧蜂科），是中国南方广东省南雄烟田烟草夜蛾（鳞翅目：夜蛾科）的主要寄生蜂。本研究对这两种寄生蜂的生态位和种间竞争关系进行了研究。结果表明，这两种寄生蜂在空间和食物资源上的竞争非常激烈，当两种寄生蜂在不同时期争夺空间和食物资源时，草蛉绒茧蜂总是占优势。因此，当它们占据相同的空间或食物资源时，草蛉绒茧蜂可能会将菜蛾盘绒茧蜂赶走。草蛉绒茧蜂对烟草田环境的适应性可能大于菜蛾盘绒茧蜂，因此草蛉绒茧蜂的种群数量可以保持得比菜蛾盘绒茧蜂高。
