套袋—剪枝法昆虫种群抽样调查技术的研究

A Study on the Method of Long Handle Pruner Bag-trapUsed in the Sampling Survey of Pest Population

本文介绍了套袋一剪枝抽样方法用于马尾松毛虫幼虫种群密度调查的情况．并研究了此法的抽样技术和害虫的空间分布型，分析和推导出了概率统计数学模型，探讨了虫口密度单位的换算等问题．此法可以克服传统方法的某些弊端，精度较高，具有一定的实用价值．

In this paper,the population density investigation on larvea of Masso,pine caterpillar by using the method of long handle pruner bag-trap is introduced.The sampling technique of themethod is studied and the spatial distribution patterns of the injurous insect are analyzed. Themathematical models of probabilistic statistics are also analyzed and deduced.And the conversionbetween the pest density units and other problems are discussed.The method can overcome thedefects of the traditional method and its precision is higher than that of the traditional one and ithas certain practical value.