油松毛虫蛹种群抽样技术的研究

Studies on the Sampling Technique of Pupae Population of Chinese Pine Caterpillar (Dendrolimus tabulae formis)

本文进行了油松毛虫蛹种群估值抽样及风险决策抽样技术的研究,其目的是为进行油松毛虫种群动态研究,实施综合管理决策提供优化的抽样设计。对估值抽样提供了三种方案:整株抽样,轮枝抽样,简易估计法。研究表明,在一定条件下,用后两种方案代替整株抽样估计种群密度可以提高抽样效率,降低抽样费用,且估计精度能达到一般科研和生产上防治决策的要求精度。关于风险决策抽样,给出了三组序贯抽样决策模型,任何一组均可应用。文中还应用了笔者提出的一组新的抽样设计模型,其结果与前人研究方法所得的结果一致。

The estimation sampling technique (EST) and risk decision sampling technique (RDST)of pupae population of Dendrolimus tabulaefor-mis were studied so as to provide a set of optimum sampling techniques for research of population dynamics and implementation of IPM of the Chinese-pine caterpillar. Three sets of EST schemes were advanced, i.e. Whole-Tree Sampling (WTS) , Ring-Branches Sampling (RBS) and Simple Estimation Sampling (SES) . The studies on EST show that, estimating pupae population density with RBS or SES instead of WTS is applicable and has the merits of simplicity, saving both time and money. Also the usual estimation precision demanded for IPM and general study can be reached. With the RDST technique, three sets of sequential sampling decision models were presented, and any can be used in an IPM decision. Some of new sampling models proposed by the authors were applied in the paper, and the results of these are in accordance with those from other methods