梨小食心虫在冬枣园的空间分布型及抽样技术研究  

Study on Spatial Distribution Pattern and Sampling Techniques of Grapholita molesta Busck in Dongzao Jujube Orchards

作　　者：田刚 尔热斯白克·塔米力 杨国梅 张栋海 王凡 TIAN Gang;Eresbek·Temir;YANG Guomei;ZHANG Donghai;WANG Fan(Institute of Agriculture Science and Technology,Division No 3.of Xinjiang Production and Construction Corps,Tumxuk Xinjiang 843900,China)

机构地区：[1]新疆生产建设兵团第三师农业科学研究所,新疆图木舒克843900

出　　处：《果树资源学报》2025年第2期14-18,共5页Journal of Fruit Resources

基　　金：2023年第二批自治区“天山英才”培养计划-基层科技骨干人才项目;第三师重点领域科技攻关项目(KY2022GG01)。

摘　　要：【目的】准确掌握南疆小海子垦区梨小食心虫在冬枣园的生物学特性及为害规律,探明其在冬枣树上的空间分布及理论抽样技术。【方法】采用聚集度指标、Taylor幂法则和lwao回归方程对梨小食心虫在冬枣园的空间分布进行系统分析;为建立最适南疆小海子垦区梨小食心虫在大田的抽样模型和抽样数,应用了lwao理论抽样和序贯抽样技术。【结果】梨小食心虫在冬枣园整体呈聚集分布,且成虫间互相吸引,分布的基本成分为个体群。分布型对密度的依赖性较强,聚集度和密度呈正相关,在低密度下呈均匀分布,种群密度越高,分布越均匀。根据Blackith提出的聚集均数λ=mr/(2k)计算各样点的聚集均数全部大于2,表明梨小食心虫在冬枣树上的聚集是由自身习性和环境因素共同引起的。根据lwao的m*—m回归方程明确了梨小食心虫的最适理论抽样公式为N=t^(2)/D^(2)[(3.2763/m)+0.0868],在同一允许误差值下,随着虫口密度的增加最适理论抽样数减小,允许误差值越小,抽样数越大,在虫口密度达到一定值时,最适理论抽样数稳定在某个值不变。【结论】当把防治阈值假设为6头/株时,求得其序贯抽样方程为Tn=6n±9.3553√n。连续调查10株冬枣时若其累计虫量大于90头,需采取防治措施。【Objective】In order to understand the biological characteristics and damage regularity of the pear fruit borer in Dongzao jujube orchard,the spatial distribution and theoretical sampling technique of the Grapholita molesta Busck on Dongzao jujube tree were studied.【Methods】The Aggregation Index,Taylor Power rule and lwao Regression Equation were used to systematically analyze the spatial distribution of carposina in Dongzao jujube orchard,lwao theory sampling and sequential sampling techniques were used to establish the best sampling model and sampling number of Grapholita molesta Busck in Xiaohaizi reclamation area of southern Xinjiang.【Results】The results showed that the armyworm distributed in the whole orchard,and the adults attracted each other.The basic components of the distribution were individual groups.The density dependence is strong,the aggregation degree and the density are positive correlation,under the low density presents the uniform distribution,the higher the population density,the more uniform the distribution.According to the aggregation meanλ=mr/(2k)proposed by Blackith,the aggregation mean of all the samples was greater than 2,which indicated that the aggregation of botrytis nipponensis on Dongzao jujube tree was caused by its own habit and environmental factors.According to the M*-m lwao Regression Equation,the optimal theoretical sampling formula is N=t^(2)/D^(2)[(3.2763/m)+0.0868],with the increase of the population density,the optimal theoretical sampling number decreases,the smaller the allowable error is,the larger the sampling number is,and the optimal theoretical sampling number is stable at a certain value when the population density reaches a certain value.【Conclusion】When the threshold value was assumed to be 6 head/plant,the sequential sampling equation was obtained as Tn=6n±9.3553√n.If the accumulative number of 10 Dongzao jujube trees was more than 90,the countermeasures should be taken.

关 键 词：梨小食心虫 冬枣园 空间分布 抽样技术 

分 类 号：S665.1[农业科学—果树学]