桂花网蝽成虫空间分布型及抽样技术

Spatial Distribution Patterns and Sampling Techniques of Eteoneus sigillatus Adult

运用聚集度指数法、频次分布检验法、线形回归方程检验法探讨了桂花树上的一种重要的害虫桂花网蝽成虫的空间分布型及抽样技术,揭示了其成虫的行为习性、活动规律及确定其在林间的适宜抽样调查方法。结果表明,桂花网蝽的空间分布型属聚集型的负二项分布。根据Iwao的m*−m的回归方程,建立了精度分别为0.05、0.1和0.2时的理论抽样数表,在桂花网蝽为1头/20 cm枝梢、2头/20 cm枝梢、4头/20 cm枝梢时,其累计虫口数的上限分别为3440、215和1755,下限分别为110、913、57。

Spatial distribution and sampling techniques of Eteoneus sigillatus adult,an important pest in Osmanthus fragrans,were studied by the aggregation indices,comparative frequency methods and liner regression analysis.And E.sigillatus adult's behavior,habits,activity regularity and its best method to sampling in the forest were explored.The results showed that its adult had an aggregated and negative binomial spatial distribution pattern.According to Iwao m*−m regression equation,the theoretical sampling list with precision of 0.05,0.1 and 0.2 could be established.The upper limit and lower limit of accumulated adult for 1,2 and 4 adult per 20 cm topmost branches of the tree were 3440,215,1755 and 110,913,57 respectively.