ome concepts of geostatistics,Such as variogram and range,were introduced in this pa-per.A dispersal index I_z was suggested to describe the dispersal of population. When I_z var-ied from 0-1,population distribution would change from uniform→random→aggregation.The data of pine moth were taken as an example to show the application of these concepts.The results indicated that the spatial distribution was dependent on the spatial location anddirections.When the interspecies spatial distribution of insects was ...