STUDIES ON THE STRUCTURE OF THE RICE PEST-NATURAL ENEMY COMMUNITY AND DIVERSITY UNDER IPM AREA AND CHEMICAL CONTROL AREA
综防区和化防区稻田害虫-天敌群落组成及多样性的研究

In the paper, the characteristics of the pest-natural enemy communities in paddy fields were studied, in two areas in which different managemental measures were taken, i.e. integrated pest management and chemical control.1. The species richness in the pest group, parasite group and spider group in the IPM area (IPMA) was almost twice as much as those in the chemical control area (CCA). The species richness of the predator group in the IPMA was 3 times more tnan that in the CCA. 2. By using a two-dimensional...