摘要
草原昆虫的适应特征及其与植物的协同演化 草原是一个以牧草为中心的生态系统。我们今天所看到的草原面貌,是历史上迭经沧桑后形成的。因此,作为该系统内重要成员的昆虫,也有一个与草原相似的演化过程。正因为如此,若干重要的经济昆虫都具有明显的适应特征。
On the basis of the fieht investigation data in Qinghai and Sinjiang,the adaptation of some important insects and the cause of fheir outbreaks on grassland have heen analysed.It was Shown that the pest occurrence on the grassland was correlated with the degeneration of meadow.The decrease of community diversity and the change of micro-climate in building up a cultured meadow would also induce the potential pest outbreak.Meanwhile,although it is important to control the mrodent pest,it would change the structure and function of communities and bring harmful influence which would be more important than that of rodentse control.So we must consider the occurresnce and control of pests from the point of integrated management.The first task in integrated management is to prevent the tendency of meadow degeneration and protect the structure diversity.In addition,it is necessary to utilize the natural enemy effectively in order to establish a proper economic threshold.From the economic standpoint,the insecticides should be used as least as possible.It was suggested that more attention shouId be paid to the research work on the ecological system in meadow for resolving all the problems as mentioned above.
作者
吴亚
金翠霞
Wu Yar;Chin Tsui-shia(Northwestern Plateau Institute of Biology,Academia Sinica)
出处
《中国农业科学》
1981年第4期81-85,共5页
Scientia Agricultura Sinica
