| 刘诗颖 1
，孙明凯 1
，李金花 1
，张业扬 1
，李 涛 2，陈剑山 2，范咏梅 1,2.海南玉米田入侵草地贪夜蛾幼虫的空间分布型[J].广东农业科学,2021,48(2):108-115 |
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海南玉米田入侵草地贪夜蛾幼虫的空间分布型 |
| Spatial Distribution of Spodoptera frugiperaLarvae in Corn Fields of Hainan Province |
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| DOI：10.16768/j.issn.1004-874X.2021.02.014 |
| 中文关键词: 草地贪夜蛾 玉米 海南 空间分布 种植制度 幼虫龄期 |
| 英文关键词: Spodoptera frugiperda corn Hainan spatial distribution cropping system larval age |
| 基金项目:国家救灾专项基金（ HD-KYH-2019134, HD-KYH-2020133） |
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| 摘要点击次数: 1797 |
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| 中文摘要: |
| 【目的】分析草地贪夜蛾 Spodoptera frugiperda （J. E. Smith） 幼虫在海南省玉米地的空间分布状况。
【方法】利用 6 种空间分布型聚集度指标、Taylor 的幂法则和 Iwao m*-m 回归法分析草地贪夜蛾低龄（1~2 龄）、
中龄（3~4 龄）和高龄（5~6 龄）3 个龄期幼虫在海南岛的空间分布。【结果】草地贪夜蛾幼虫的空间分布主
要与海南地区玉米种植制度、幼虫龄期及气候差异相关。苗期、小喇叭口期和大喇叭口期受害率相对较高，三
龄幼虫占比最高，成聚集分布；开花期和成熟期多为 5~6 龄幼虫，成均匀分布状态。从区域分布来看，在海南
省东部和中部的玉米田中该害虫幼虫为聚集分布，在南部和北部地区的玉米田中，呈均匀分布（I>0, C>1, K>0,
Cα>0, m*/m>1, α>0, β>1, lg α>1, b>1）。根据 Taylor 幂法则 lg v=0.23663+1.24689 lg m（R=0.9437）及线性回归方
程 m*=-0.07870+2.16842m（R=0.7777）对各田块数据进行分析，得出害虫在海南各地区整体呈现为聚集分布且
聚集度不依赖于种群密度的特征。【结论】研究结果对草地贪夜蛾种群密度调查和防治适期选择具有指导作用。 |
| 英文摘要: |
| 【Objective】 The study was conducted to analyze the spatial distribution of Spodoptera frugiperda（J.
E. Smith） larvae in corn fields of Hainan Province.【Method】Six aggregation indexes, Taylor power law and Iwao m*-m
regression method were used to analyze the spatial distribution of S. frugiperda larvae in three stages: low age（1st-2nd
instar）, middle age（3rd-4th instar）and old age（5th-6th instar） in Hainan Island.【Result】The spatial distribution of S.
frugiperda larvae was mainly related to corn planting system, larval instar and climate in Hainan. It was damaged seriously
in seedling stage, small bell stage and big bell stage. The proportion of 3rd instar larvae was the highest, and they were
distributed in aggregation. The 5th-6th instar larvae distributed evenly in flowering and mature stages. From the perspective
of regional distribution, the S. frugiperda larvae were concentrated and distributed in the eastern and central parts of Hainan
Province, and evenly distributed in the southern and northern parts（I>0, C>1, K>0, Cα>0, m*/m>1, α>0, β>1, lg α>1,
b>1）. The data of each field were analyzed according to Taylor power law lg v=0.23663+1.24689 lg m（R=0.9437）and linear regression equation m*=-0.07870+2.16842m（R=0.7777）, and it could be concluded that the pests in each
area of Hainan showed an aggregated distribution and the aggregation degree was not dependent on the population density.
【Conclusion】The research result will provide references for the investigation of population density and selection of
appropriate period of pest control. |
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