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[目的]研究桉蝙蛾幼虫的空间分布型。[方法]通过对广西北流市和陆川县等地的桉树人工林进行幼虫分布调查,共设10块标准地,采用6种不同的聚集度指标和回归模型分析法判断桉蝙蛾幼虫的空间分布格局。[结果]桉蝙蛾幼虫主要分布在1m以下树干基部;按蝙蛾幼虫的空间分布型主体为聚集分布,是环境因素的作用结果。桉蝙蛾幼虫在不同虫口密度下最适抽样数公式n=t2(1.1/m+0.6744)/D2和序贯抽样决策限模式:T’0(n),T″0(n)=n±1.332n~(1/2)(取m0=1)。[结论]研究结果为桉蝙蛾的调查取样和预测预报工作提供了科学依据。
[Objective] The research aimed to study the spatial distribution of eucalyptus moth larvae. [Method] The investigation of larvae distribution in Eucalyptus plantations in Beiliu and Luchuan counties of Guangxi showed that there were 10 standard plots in total. The spatial distribution of larvae of Eucalyptus moths was determined by 6 different aggregation indexes and regression model analysis Distribution pattern. [Result] The larvae of Eucalyptus were mainly distributed in the base of trunk below 1m. According to the spatial distribution of the main body of the larva of the moth, it was the result of environmental factors. The optimal sampling number of eucalyptus moth larvae at different population density was n = t2 (1.1 / m + 0.6744) / D2 and the sequential sampling decision-making mode was T’0 (n), T "0 1.332n ~ (1/2) (taking m0 = 1). [Conclusion] The results provide a scientific basis for the investigation, sampling and forecasting of Eucalyptus moth.