桔小实蝇雄成虫空间分布的地理统计学分析

通过性引诱剂诱集桔小实蝇雄成虫，应用地理统计学的方法分析研究了桔小实蝇雄成虫空间变异规律，建立了东西和南北2个方向的间隔距离和半方差值之间的球型模型和指数模型．结果表明，番石榴园中桔小实蝇东西方向上的球型模型显示其变程范围是292．0～920．2m，平均为475．4m，指数模型显示其变程范围是447．6～1567．8m，平均变程是1235．2m；而南北方向上，球型模型的变异曲线除7月18日和7月30日外均表现为块金分布形式，7月18日和7月30日模型显示变程分别为594．6和583．2m，平均为588．9m；指数模型结果显示，只有7月14日呈块金分布，18、22、26、30日的变程范围分别为2514．6、770．4、1496．4、1875．6m，平均为1664．3m．

The Spatial Pattern of Bactrocera dorsalis Males with Geostatistics

Spatial pattern of oriental fruit fly Bactrocera dorsalis(Hendel) males was studied in the guava orchard by using geostatistical method.Methyl eugenol was used to attract the males in the sample.The semiviariograms were described at the two directions of east-west and south-north.The results showed that the semivatiograms of B.dorsalis was described by a spherical model and an exponential model,and indicated a spatial pattern ranging from 292.0 to(920.2) m with a spherical model and from 447.6 to(1 567.8 m) with an exponential model in the north-south.The spherical model showed nugget in the east-west.The exponential model indicated a spatial pattern ranging from 770.4 to(2 514.6 m) during from 18~(th) to 30~(th) July,but it indicated nugget in 14~(th) July.