中文摘要：

通过对云南省昆明市某花卉基地大棚非洲菊不同花期、不同时间西花蓟马种群动态和空间分布的调查,运用聚集度指标、Iwao和Taylor回归方程进行了其空间分布图式的测定。结果表明：西花蓟马为非洲菊上蓟马优势种,盛花期共数量占蓟马总数的96%,成虫数量随非洲菊开放花朵的增加而增加,到盛花期达最高密度15头/朵,而若虫主要集中在即将凋谢的花朵中,最高密度达36头/朵。5月中旬为蓟马的危害高峰期,且蓟马的总量随温度的增减变化明显。西花蓟马成虫和若虫在非洲菊上的空间分布格局为聚集分布,且聚集度随种群密度的升高而增加,成虫的聚集原因主要是环境因素和自身的习性,而若虫的聚集原因主要是环境因素。利用Iwao回归法中的α,β参数计算出在允许误差范围内的理论抽样数,为田间调查取样提供了有效方法,并为西花蓟马的预测及防治提供了理论依据。

英文摘要：

In the study,aggregate indexes,Iwo and Taylor regression formulations were used for spatial pattern and population dynamics of west flower thrip（Frankliniella occidentalis） on flowers of gerbera in greenhouse by the investigation of population of thrips on different florescence of gerbera in a flower base of Kunming.The results showed that the dominant species was WFT（F.occidentalis） which accounted for 96% of total thrips in the blooming stage,and the number of adult increased along with the quantity of blossom uplifted that up to 15 per flower in the blooming stage,but the most population of larva was 36 per faded flower.It also that the amounts of WFT changed obviously with the temperature increasing or decreasing,and the harm peak of thrips was in mid-May.The spatial distribution pattern of the WFT adults and larvae belonged to aggregating distribution and the aggregation degree enhanced with the rise of population density,the primary cause of adult aggregation was environmental factor and their own behavior,but for larvae,the main reason was the environmental factor.Theoretical sampling within allowable error was calculated by α and β parameters of Iwao regression formulation,which provided an effective method for sampling and investigation,and also provided a theoretical basis for forecasting and prevention of WFT.