黄斑长翅卷叶蛾幼虫空间分布型及抽样技术研究

【目的】确定黄斑长翅卷叶蛾幼虫空间分布型及理论抽样数,为预测预报及综合防治提供理论依据。【方法】采用Taylor幂法则I、wao线性回归及各种聚集度指标法分析了黄斑长翅卷叶蛾幼虫的空间分布型。【结果】黄斑长翅卷叶蛾幼虫在田间符合聚集分布,且个体间相互排斥。其种群聚集原因是由昆虫本身习性和环境共同引起的。根据Iwao最适抽样公式得出了理论抽样模型并计算出不同虫口密度下最适理论调查取样数量及序贯抽样模型。【结论】黄斑长翅卷叶蛾幼虫在田间呈聚集分布。

Studies on Spatial Distribution and Sampling Techninques of Acleris fimbirana Thunberg Larvae

【Objective】To determine the space distribution pattern and the theory of sample number of Acleris fimbirana Thunberg larvae.【Method】The spatial distribution of Acleris fimbirana Thunberg larvae was examined by using various indicators of aggregated degree and the regression of straight line(m*-m) and Taylor method. 【Result】All indicators indicated that the spatial distribution of the larvae in the fields belongs to the aggregate pattern and repelling each other between the individuals.Its population gathered reason is caused by the habit and environment where the insects live.The mathematical statistics analysis results show that there were no significant differences of population density in 4 positions of the east,south,west and north of the plants.The suits sampling quantity model of the different larvae density and the sequential sampling model were presented on the spatial pattern analysis.【Conclusion】Acleris fimbirana Thunberg larvae in the field are gathered distribution.