腾冲红花油茶果实桃蛀螟的空间分布及抽样技术  

Spatial distribution of Conogethes punctiferalis in the fruit of Camellia reticulata and sampling technique

作　　者：蒋华 黄佳聪 谢胤 余祖华 杨继萍 JIANG Hua;HUANG Jiacong;XIE Yin;YU Zuhua;YANG Jiping(Forestry and Grassland Technique Promotion Station of Baoshan City,Yunnan Province,Baoshan 678000,China;Forestry and Grassland Technique Promotion Station of Tengchong City,Yunnan Province,Tengchong 679100,China;Forestry and Grassland Ecological Restoration Station of Tengchong City,Yunnan Province,Tengchong 679100,China)

机构地区：[1]云南省保山市林业和草原技术推广站,保山678000 [2]云南省腾冲市林业和草原技术推广站,腾冲679100 [3]云南省腾冲市林业和草原生态修复站,腾冲679100

出　　处：《植物保护》2023年第1期285-290,共6页Plant Protection

基　　金：云南省科技特派员项目(202004BK091581)。

摘　　要：为明确桃蛀螟Conogethes punctiferalis幼虫在腾冲红花油茶Camellia reticulata果实上的为害、空间分布和理论抽样技术,对云南省腾冲市9块不同腾冲红花油茶林的桃蛀螟幼虫发生量进行标准地调查,应用聚集度指标法、Iwao回归分析法和Taylor幂法则,分析桃蛀螟幼虫的空间分布型,应用Iwao理论抽样和序贯抽样技术,建立最适腾冲红花油茶桃蛀螟幼虫田间调查的抽样模型和抽样数。结果表明,桃蛀螟对腾冲红花油茶果实的为害率为3.07%~99.27%,适生栽培区植株平均受害率达34.74%,林间平均虫口密度0.07~2.49头/果。桃蛀螟幼虫在腾冲红花油茶林内总体呈均匀分布,虫口密度越高分布越均匀,分布的基本成分是个体群,且个体间相互吸引;而虫口密度相对较低时呈聚集分布,聚集原因主要是某些环境因素。进一步分析提出了不同种群密度下桃蛀螟幼虫的理论抽样模型和基于防治指标的序贯抽样技术,可为科学开展林间桃蛀螟虫口调查和防治工作提供技术支撑。In order to clarify the damage,spatial distribution and theoretical sampling technique of Conogethes punctiferalis in the fruit of Camellia reticulata,the occurrence of Co.punctiferalis was investigated in nine different sample plots of Ca.reticulata in Tengchong city,Yunnan province.The spatial distribution pattern of Co.punctiferalis was analyzed by using the clump intensity index,Iwao regressive analysis and Taylor power law.Iwao theoretical sampling and sequential sampling techniques were used to establish the most suitable sampling model and sampling size for the field investigation of Co.punctiferalis in Ca.reticulata.The results showed that the damage rate of Co.punctiferalis in the fruit of Ca.reticulata was 3.07%-99.27%;the average damage rate of plants in the suitable cultivation area was 34.74%,and the average population density in the forest was 0.07-2.49 individual per fruit.The larvae of Co.punctiferalis displayed a uniform distribution in the forest of Ca.reticulata.The higher the population density,the more evenly distributed.The basic component of distribution was individual groups,and individuals attracted each other.When the population density was relatively low,it showed aggregation distribution,and the aggregation was mainly caused by environmental factors.Further study should include the theoretical sampling model of Co.punctiferalis larvae under different population densities and the sequential sampling technique based on control thresholds,which would provide a technical support for scientific investigation of insect populations in the forest and pest control.

关 键 词：桃蛀螟 腾冲红花油茶 空间分布 抽样技术 

分 类 号：S431.16[农业科学—农业昆虫与害虫防治] Q968.1[农业科学—植物保护]