咖啡天牛幼虫种群的空间分布型及应用

咖啡旋天牛和灭字虎天牛是危害咖啡的重要害虫。本研究表明，咖啡天牛混合种群的空间分布为随机分布１。这是咖啡天牛群的重要生物学科技司。在此基础上，建立了运用被害株度估计平均密度的模型和理论抽样公式。这些模型对咖啡天牛的密度调查有着极其重要的实用价值。

SPATIAL DISTRIBUTION AND ITS APPLICATION OF POPULATION OF COFFEE STEM-BORER

Coffee stem-borers Acalolepta cervinus (Hope) and Xylotrechuse quadripes Chevr. are two major pests damaging coffee trees in Yunnan Province. This study shows that the spatial distribution of mixed population is of random distribution based on Taylor's model, Poisson's index and Morisita's index. Additionally, the empirical models for estimating the density and determining the sample size are developed in this study. These models might be of practical value.