桃小食心虫卵的空间格局动态研究

桃小食心虫(Carposina niponensis Walsingham)是我国果树的主要害虫之一,为了研究该虫在苹果园内的空间分布情况,2009年7-8月在大连市普兰店地区苹果园中对其进行了动态调查研究。应用扩散系数(C)、平均拥挤度(m)等6种聚集度指标分析桃小食心虫卵的空间分布型,结果表明,桃小食心虫卵在7月1-15日、7月16-31日、8月1-20日在单棵苹果树上的空间分布型分别为均匀分布、聚集分布、聚集分布,在整个苹果园中的分布型均为聚集分布。并利用聚集均数λ分析了该虫的聚集原因,认为是由其自身的习性和环境因素中的任何一个,或者二者共同作用引起的。

Dynamics Studies on Spatial Distribution Pattern of Carposina niponensis Eggs

Carposina niponensis Walsingham is one of main pests damaging the apple tree in China.Six aggregation indices such as diffusion coefficient(C) and mean crowding(m) were used to analyze the spatial distribution of the eggs of C.niponensis Walsingham in the apple orchardduring July to August,2009.The results showed that the distribution of C.niponensis eggs belonged to the pattern of symmetrical distribution during July 1 to July 15,and aggregative distribution during July 16 to July 31,August 1 to August 20 on a single tree.But the distribution pattern in the whole apple orchard was aggregative distribution.The aggregation was caused by either one of its behavior and environment or the both through Arbous & Blackith's method.