摘要
【目的】辣木瑙螟是在中国辣木上新发现的1种鳞翅目草螟科害虫,主要以幼虫取食叶片、钻蛀果荚形成危害。为明确其在田间的分布特点,2015年9月采用分层随机抽样法在云南省元江县的辣木园内对辣木瑙螟幼虫进行调查。【方法】通过6种聚集度指标(C、I、Ca、m^*/m、La、K)、Iwao的m^*-m回归模型、Taylor幂法则等分析了辣木瑙螟幼虫种群的空间分布型,并利用种群聚集均数分析了幼虫种群的聚集原因。【结果】辣木瑙螟幼虫在辣木上的空间分布型为依赖于密度的聚集分布,分布的基本成分为个体群,且个体间相互吸引。聚集均数分析表明:辣木瑙螟幼虫的聚集原因主要由其产卵、取食等习性和环境共同引起;辣木瑙螟幼虫平均虫口数受水平方向的影响较小,但受垂直方向的影响较大;建立了辣木瑙螟幼虫抽样数公式:N=t^2/D^2(3.548/m+0.253)和序贯抽样方程[T(n) n±1.95√1.95]【结论】本研究丰富了辣木瑙螟在云南省的研究数据,同时为林间虫情的预测预报及防治策略的制定提供参考依据。
[Purpose]Noorda blitealis Walk (Lepidotera: Crambidae), a pest newly discovered on moringa trees in China, whose larvae feed on leaves and fruits. In order to understand the distribution of their larvae at moringa plantation, an investigation with stratified random sampling was conducted on the larvae number in moringa plantation of Yuanjiang County, Yunnan Province in September, 2015.[ Method] Six aggregation indices (C、I、Ca、m^*/m、La、K) and two regression models (Iwao’s regression equation and Taylor’s power law) were used to test and determine the spatial distribution patterns of N. blitealis larvae of moringa plantation, the reasons for the aggregation of N. blitealis larvae was analyzed according to estimation by aggregation mean (λ).[Result]The spatial distribution pattern of the larvae belonged to the aggregation distribution with density dependence. Basic component of spatial distribution was a group of individuals, which attracted one another. In addition, the aggregation average method was applied to analyze the aggregation reasons of the larvae. The oviposition and feeding habit of N. blitealis and environmental factors were the main factors. The average population density of larvae was less affected by horizontal direction, but greater affected by vertical direction. The optimal sampling equation [N=t^2/D^2(3.548/m+0.253)] and sequential sampling equation [T(n) n±1.95√1.95] were established.[Conclusion]This study enriches the data of N. blitealis in Yunnan Province and provides the base for forecast and control of N. blitealis.
作者
李召波
夏涛
王应清
曾千春
马春花
马丽宣
李强
高熹
田洋
LI Zhaobo;XIA Tao;WANG Yingqing;ZENG Qianchun;MA Chunhua;MA Lixuan;LI Qiang;GAO Xi;TIAN Yang(College of Plant Protection,Yunnan Agricultural University,Kunming 650201,China;Dehong Institute of Tropical Agrcultural Sciences of Yunan Province,Dehong 678600,China;Yunnan Institute of Moringa,Kunming 650201,China;State Key Laboratory for Conservation and Utilization of Bio-resources in Yunnan,Kunming 650201,China)
出处
《云南农业大学学报（自然科学版）》
CSCD
北大核心
2019年第4期597-602,共6页
Journal of Yunnan Agricultural University:Natural Science
基金
云南省重点研发计划项目(2017ZF004)
现代农业产业技术体系建设项目(CARS-11-YNZQC)
农业农村部农业技术试验示范与服务支持项目(151821301064072708-17)
关键词
辣木
辣木瑙螟
空间分布型
抽样技术
moringa
Noorda blitealis
spatial distribution pattern
sampling technique
