论文部分内容阅读
经采样鉴定,为害海南豇豆的蓟马为普通大蓟马Megalurothrips usitatus(Bagrall),本文利用6种空间分布型聚集度指标、Taylor的幂法则和Lwao m*/m回归法对该害虫的空间分布型进行测定。结果表明:在豇豆中普通大蓟马种群在垂直空间、水平空间均呈聚集分布,而且均符合负二项分布,且种群聚集强度随种群密度升高而增加。该结果对研究蓟马在豇豆上的分布为害规律、制定有效防控策略等都有重要意义。
After sampling and identification, the thrips of Hainan cowpea were Megalurothrips usitatus (Bagrall). In this paper, six kinds of spatial distribution clustering index, Taylor’s power law and Lwao m * / m regression were used to analyze the spatial distribution of the pest Type determination. The results showed that in the cowpea, the population of common thrips was aggregated in both vertical and horizontal positions, all of them fit the negative binomial distribution, and the population aggregation intensity increased with the population density increasing. The results on the study of thrips in the distribution of cowpea damage rules, the development of effective prevention and control strategies are of great significance.