The Spatial Distribution Patterns of Tomicus brevipilosus (Eggers) Adults in Trunk

Survey was made of the density of Tomicus brevipilosus (Eggers) in trunk. The aggregated indices and regression analyses showed that the spatial distribution patterns of Tomicus brevipilosus (Eggers) was a aggregated distribution. The regression equation was established based on different position population density in trunk and sample average population density,and the best sampling position was the south of trunk. At the same time, the best sampling table, sequential sampling plan and the maximum sampling amount were determined.