不同树龄桃园桃红颈天牛幼虫空间分布型研究  

Spatial distribution patterns of Aromia bungii larvae in peach orchards with different tree ages

作　　者：李密[1] 黄凯波 何振[1] 钟武红 伍南 刘清 LI Mi;HUANG Kaibo;HE Zhen;ZHONG Wuhong;WU Nan;LIU Qing(Hunan Academy of Forestry,Changsha,Hunan 410004,China;Garden Management Department of Huaihua,Huaihua,Hunan 418000,China;Hunan Linkeda Agricultural and Forestal Technology Service Co.Ltd,Changsha,Hunan 410004,China)

机构地区：[1]湖南省林业科学院,湖南长沙410004 [2]怀化市园林管理处,湖南怀化418000 [3]湖南林科达农林技术服务有限公司,湖南长沙410004

出　　处：《湖南农业大学学报（自然科学版）》2018年第4期388-394,共7页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：湖南省科学技术厅重点项目(2016NK2159)

摘　　要：对湖南省靖州县1~20年生桃园桃红颈天牛幼虫平均密度和桃树受害率进行系统调查,应用5种聚集度指标法和2种回归模型法,比较了不同树龄桃红颈天牛幼虫空间分布型的差异。结果表明:1~2年生幼龄桃树基本不受桃红颈天牛危害,3年以上挂果后的桃树开始受到侵害;随着树龄的增加,桃树受害率和桃红颈天牛虫口平均密度显著增加,19~20年生桃树受害率达90%以上,平均虫口密度超过2头/株;桃红颈天牛在桃园中呈聚集分布,具有密度依赖性,即随种群密度升高,聚集程度增大,3~15年生桃园桃红颈天牛均呈聚集分布,基本成分是个体群,个体间相互吸引;16~17年生桃园桃红颈天牛空间分布型趋向于随机分布或均匀分布;19~20年生桃园桃园桃红颈天牛均呈聚集分布,此时分布的基本成分均为个体,个体呈现相互排斥现象。应用桃红颈天牛幼虫种群的空间分布信息,建立了不同树龄桃园桃红颈天牛幼虫种群的抽样公式。根据理论抽样公式,桃红颈天牛虫口密度越小,抽样数量较多,而在虫口密度较高的情况下抽样数量则较少。根据序贯抽样公式,可将3~20年生桃园抽样样本数量划分成6个区段:3~4年生桃园;5~6年生桃园;7~8年生桃园;9~13年生和19~20年生桃园;14~15年生桃园;16~18年生桃园。An investigation was made on the ratio of infested peach trees and the population density of the longicorn larvae in 1– to 20–year–old peach orchards, which is located in Jingzhou County, Hunan Province, a semi–closed ecosystem to compare the differences of spatial distribution patterns of Aromia bungii（A. bungii） larvae in peach orchards with different tree ages by using five aggregation indexes examination and two regressions analysis. The results indicated that the 1– to 2–year–old trees were not infested by A. bungii larvae which attacks peach tree at and above 3–year–old. The ratio of infested trees and the average population density of longicorn larvae significant increased with increasing tree ages, in 19– to 20–year–old peach orchards, the ratio of infested trees was above 90% and the average population density was above 2 beetles per tree. The larvae of A. bungii had an aggregated spatial pattern and showed density dependence, in which aggreation increased with increasing population density. In 3– to 15–year–old peach orchards, A. bungii larvae exhibited aggregated distribution basically composed of individual group in which larvae attracted mutually among individuals. In 16– to 17–year–old peach orchards, A. bungii larvae showed random distribution or uniform distribution while in 19– to 20–years–old, showed aggregated distribution in which the basic component was individuals which repelled one another. Using the spatial distribution information of A. bungii larvae, the sampling formula for A. bungii larvae populations in peach orchards with different tree ages was established. According to the theoretical sampling formula, the smaller the density of A. bungii larvae, the larger the sampleing quantity, andwhereas the smaller the sampleing quantity is low when the density is high. Based on sequential sampling formula, the sampling quantity of A. bungii larvae in 3– to 20–year–old peach orchards were divided into six sections： peach orchards of 3 to 4

关 键 词：桃红颈天牛 桃树 树龄 聚集度指标 空间分布型 抽样技术 

分 类 号：S431[农业科学—农业昆虫与害虫防治]