油桐尺蠖幼虫空间分布特征调查分析

Research on Spatial Distribution Patterns of Buasra suppressaria Larva

在惠州选取4个桉树林区,对油桐尺蟆Bt/ass si/p/wessaKa幼虫的空间分布进行了调查与分析。结果表明,油桐尺蟆幼虫的空间分布格局为聚集分布,不同高度层、不同方位,尺蟆幼虫数量分布存在着较大的差异。其中,尺蟆数量分布最多的为中部,中部尺蟆幼虫占各层尺蟻总量平均达55.97%65.34%,最高的可占尺蟆幼虫总数的67.74%;同时,在不同方位上,尺蟆种群主要集中分布在南方位,其次为东、西两方位,分别占幼虫总数的34.59%、22.56%、24.81%。因此,进行该虫监测与防控时,应合理利用尺蟻种群在不同方位与高度的分布差异,重点防范中部层与南方位枝条并重施药防治。

Four eucalyptus forest areas in Huizhou were selected to investigate and analyze the spatial distribution of inchworm larvae.The results showed that the spatial distribution pattern of the inchworm larvae was aggregated,and there were significant differences in the number distribution of at different heights and orientations.The largest number of inchworm larvae is in the middle layer.The average number could account for 55.97%-65.34%of the total inchworm larvae number,and the highest percentage reached 67.74%.For distribution in different orientation,the inchworm larvae population is concentrated in the south,followed by east and west,accounting for 34.59%,22.56%and 24.81%of the total number of larvae,respectively.Therefore,when monitoring and controlling the inchworm worm,the distribution differences of the population in different orientations and heights should be taken into account.The focus of prevention should be on the middle and southern branches,and the application of pesticides should be emphasized on these parts.