竹小爪螨空间分布型的研究

A Study on the Spatial Pattern of Spider Mite:Oligonychus urama

研究结果表明:竹小爪螨卵群体在年生长季节中大多数时期呈聚集分布,仅4月上、中旬呈Poisson分布,年周期中表现出中度聚集Poisson分布高度聚集低度聚集中度聚集的变化规律;竹小爪螨活动螨群体除4月下旬呈Poisson分布外,其余时间均呈聚集分布,年周期中表现出中度聚集Poisson分布低度聚集中度聚集的变化规律,且大多数期的聚集程度比卵低;旬平均气温、旬平均相对湿度、旬降雨量、旬天敌捕食螨量等4个因子与竹小爪螨卵群体和活动螨群体的 m/ x值相关分析表明:仅旬平均气温与竹小爪螨活动螨群体的空间分布型密切相关.

By spot check in Phyllostachys heterocycla cv.pubescens forest in Nanping Fujian in 1997,the research results showed that Egg's of Oligonychus urama spatial patterns of each stage were all of aggregation distribution except of poisson distribution in the first and second ten days of April,which presented the regularity of mid-degree aggregation→poisson distribution→high-degree aggregation→low-degree aggregation→mid-degree aggregation.Active mites'spatial patterns were also all of aggregation distribution except of poisson distribution in the last ten days of April,which presented the regularity of mid-degree aggregation→poisson distribution→low-degree aggregation→mid-degree aggregation.The correlative analysis indicated that the effect sequence of climate and predatory mites on eggs aggregation degree was air temperature.>relative humidity>predatory mites>rainfall,and on the active mites,the sequence was air temperature>predatory mites>predatory mites>relative humidity>rainfall.