【目的】确定山核桃透翅蛾(Sphecodoptera sheni)幼虫在薄壳山核桃(Carya illinoinensis)树上的空间分布型及抽样技术。【方法】采用频次分布法、6种聚集度指标(C、I、K、CA、M*/M、Iδ)、Taylor幂法则和Iwao回归方程对山核桃透翅蛾幼虫在薄壳山核桃大树上的空间分布型和抽样技术进行研究,计算Blackith聚集均数λ,分析山核桃透翅蛾幼虫种群的聚集原因。【结果】山核桃透翅蛾幼虫在薄壳山核桃上呈聚集分布,分布的基本成分为个体群,聚集度随种群密度升高而增大。山核桃透翅蛾幼虫种群聚集是由环境条件和自身特性共同引起的。【结论】建立山核桃透翅蛾幼虫种群的理论抽样表和序贯抽样公式,可为该虫害的抽样调查和防治提供理论依据。
Abstract
【Objective】 The purpose of the present study was to evaluate the spatial distribution pattern and sampling technique for Sphecodopter sheni larvae on Carya illinoinensis. 【Method】 Frequency distribution, six aggregation indexes(C, I, K, CA, M*/M, Iδ), Taylor power, and Iwao’s regression equation were used to analyze the spatial distribution pattern and sampling technique for S. sheni larvae on C. illinoinensis. The assembling reasons were analyzed using average aggregation size λ. 【Result】S. sheni larvae exhibited a characteristic pattern of aggregation distribution, and the aggregation intensity increased with the increasing density. The aggregation of S. sheni larvae was dependent on its own biological characteristics and environmental factors.【Conclusion】 The theoretical sampling table and sequential sampling formula of the larvae population were established, which provides a theoretical basis for the sampling investigation and helps in the prevention of the pest infestation.
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基金
收稿日期:2018-04-02 修回日期:2019-02-25
基金项目:江苏省农业科技自主创新资金项目(CX(17)1004); 江苏省经济林有害生物普查项目。
第一作者:刘凯舟(408947092@qq.com)。*通信作者:巨云为(Jyw6808@njfu.edu.cn),副教授,ORCID(0000-0003-1413-8775)。
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