Abstract: [Objective]In order to provide valuable information and suggestion on controlling Batocera horsfield, an important wood-borer pest, geostatistical spatial distribution of its egg, larva, adult or pupa were studied, when it attacked and damaged severely different poplar forests.[Method]Population size of B. horsfieldi egg, larva, adult or pupa were determined, by the investigating of incisions, frass holes and emergence holes of sampling trees at four forest type plots, including highway forest, patch forest, ditch forest and village forest. Spatial distribution patterns of egg, larva, adult or pupa of B. horsfieldi in different poplar forest types, were analyzed with geostatistical method.[Result]The semivariogram curve models of egg, larva, adult (pupa) of B. horsfieldi in different poplar forest types were as follows. The highway forests were all spherical models. The patch forests were all exponential models. The ditch forests are exponential models, spherical model and gauss model. The village forests were spherical models, exponential model and exponential model. Therefore, it was found that the spatial distribution patterns of the all the models were aggregated, although their models were different in different poplar forest types. The semivariogram curve models and models parameters of B. horsfieldi population in different poplar forest types were obviously different, because poplar forest types effected their population size and distribution. The range(a), nugget(C₀), sill (C₀+C) of egg, larva and adult (pupa) in patch forest plots were less than those of other three type forest plots.[Conclusion]The spatial distribution patterns of B. horsfieldi egg, larva, adult or pupa were all aggregated, when it damaged poplar trees in highway forest, patch forest, ditch forest and village forest respectively. In short, the spatial patters of their different developmental stages in different poplar forest types were all aggregated distribution. There was little correlation between the aggregated behavior and forest types of B. horsfieldi attacking. But forest types effected semivariogram curve models and models parameters of B. horsfieldi population in different poplar forest types.

Key words: Batocera horsfieldi, spatial distribution, geostatistics, poplar forest