| 摘要: |
| 【目的】研究西花蓟马在宁夏设施蔬菜辣椒花期的空间分布特征，为进一步了解该虫的发生、危害、扩散行为及探讨西花蓟马的监测、诱杀和综合防治奠定基础。【方法】采用空间分布型适合度卡方拟合、聚集度指标检验等方法,对宁夏设施蔬菜辣椒花期西花蓟马的空间分布特征进行统计分析。【结果】频次分布统计结果表明，西花蓟马在宁夏设施蔬菜辣椒花期的分布数量为0～7头/朵，其中0和1头/朵的频次较高，随着虫口密度的增加，频次明显递减。空间分布型适合度卡方拟合结果表明，西花蓟马在设施蔬菜辣椒花期的空间分布符合奈曼分布和负二项分布，进一步分析表明更符合奈曼分布。聚集度指标检验结果表明，西花蓟马在设施蔬菜辣椒花期属于聚集分布，聚集度较大，聚集原因是环境异质性所致。【结论】明确了西花蓟马在宁夏设施蔬菜辣椒花期的空间分布特征，为研发更有效的西花蓟马防控技术提供了理论依据。 |
| 关键词: 辣椒 西花蓟马 空间分布 聚集度指标 |
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| 基金项目:宁夏农林科学院科技创新先导资金项目（NKYJ-17-05）；宁夏自然科学基金项目（NZ15128）；国家自然科学基金项目（31660621）；宁夏“十三五”重大科技项目（2016BZ0904）；一二三产业融合发展科技创新示范项目（YES-16-03）；国家重点研发计划项目（2016YFC1201200） |
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| Spatial distribution pattern of Frankliniella occidentalis during pepper flowering stage in Ningxia |
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ZHANG Zhike,WU Shengyong,LEI Zhongren,et al
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| Abstract: |
| 【Objective】Invasive species western flower thrips (Frankliniella occidentalis) is one kind of vital pests to greenhouse vegetables in Ningxia.This study investigated the spatial distribution pattern of Frankliniella occidentalis during pepper flowering stage in Ningxia to provide basis for understanding the occurrence,harm and diffusion behavior,monitoring and integrated control of Frankliniella occidentalis.【Method】The spatial distribution pattern of F.occidentalis on greenhouse pepper flowers in Ningxia was studied using fitness chi-square fitting,aggregation indexes and linear regression equation tests.【Result】The frequency distribution indicated that the population density of Frankliniella occidentalis on greenhouse pepper flowers was 0 to 7 each flower,with the highest frequencies of 0 and 1 per flower.The frequency declined significantly with the increase of population density.The spatial distribution pattern of F.occidentalis followed the negative binomial distribution and Neyman pattern and further analysis showed that they followed the Neyman pattern better.The aggregation indexes test indicated aggregative distribution caused by environmental heterogeneity.【Conclusion】This study clarified the spatial distribution pattern of F.occidentalis on greenhouse pepper flowers in Ningxia，which provides basis for developing effective control technology. |
| Key words: pepper Frankliniella occidentalis spatial distribution pattern aggregation index |
