| ,2014,垂叶榕榕管蓟马空间分布型及其抽样模型[J].环境昆虫学报,(5):828-832 |
| 垂叶榕榕管蓟马空间分布型及其抽样模型 |
| Spatial distribution of gall thrips, Gynaikothrips uzeli (Thysanoptera: Phlaeothripidae), in Ficus benjamina |
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| DOI： |
| 中文关键词: 虫瘿蓟马 榕管蓟马 空间格局 抽样模型 |
| 英文关键词:Gall thrips Gynaikothrips uzeli Spatial distribution pattern Sampling model |
| 基金项目:国家公益性行业（农业）科研专项（200803025）资助 |
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| 中文摘要: |
| 榕管蓟马（Gynaikothrips uzeli）是观赏植物垂叶榕（Ficus benjamina）的重要害虫。通过对垂叶榕不同方位和高度的随机取样，运用5种聚集度指标以及Taylor幂法和Iwao回归模型分析和测定了榕管蓟马的种群空间格局。结果表明：榕管蓟马虫瘿主要分布于垂叶榕的中、下层，且下层4个方位的虫口密度差异均不显著。榕管蓟马虫瘿在垂叶榕上的理论分布型符合负二项分布，各项聚集度指标均满足CA＞1、IDM＞0、m*/m＞1，且0＜K＜8，表明该蓟马在垂叶榕上的空间分布型为聚集分布，其聚集分布的原因与自身营虫瘿生活及喜阴习性有关。应用Iwao理论抽样模型确定了榕管蓟马不同种群密度与不同精度要求下的理论抽样数。 |
| 英文摘要: |
| The gall thrips, Gynaikothrips uzeli Zimmerman, is a serious pest to ornamental plant Ficus benjamina. The spatial distribution pattern of G. uzeli in F. benjamina was analyzed by using the five population aggregating indexes, Talyor’s power law and Iwao’s regression model by random sampling at 4 different directions and 3 different heights within the plant. The results showed that the distribution of the gall thrips population mainly located at the middle and lower locations of F. benjamina, and there is no significant difference for the gall density of G. uzeli at 4 different directions in the lower location of the plant. The spatial distribution of G. uzeli accords with the negative binomial distribution and belongs to the aggregating distribution pattern based on that all aggregating indexes meet CA＞1, IDM＞0, m*/m＞1 and 0＜K＜8. The formula of the optimal sampling model within allowable errors was provided based on the Iwao’s regression model. The results suggest that the aggregating distribution pattern of G. uzeli is related to its habits of gall-forming and shade-requiring. |
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