榆跳象对榆树种类的选择性及幼虫空间分布调查  

Survey on Selecting Elm Types and Spatial Distribution of Larvae of Rnynchaenus dlni Linnaeus

作　　者：阿不都瓦哈.艾再子 阿地力.沙塔尔 

机构地区：[1]新疆农业大学林学与园艺学院,乌鲁木齐830052

出　　处：《新疆农业大学学报》2016年第2期127-131,共5页Journal of Xinjiang Agricultural University

基　　金：新疆维吾尔自治区科技计划项目(201130102-3)

摘　　要：在新疆乌鲁木齐市,对4块不同榆树林地榆跳象(Rnynchaenus dlni Linnaeus)发生程度进行了调查。分别用5种判断空间分布格局的聚集度指标和Talor等回归分析法对榆跳象幼虫的空间分布型进行了研究。结果表明,榆跳象的发生程度与榆树种类之间有明显的差异,在50cm长标准枝上的有虫率为金叶榆>白榆>倒榆>圆冠榆>大叶榆>春榆>裂叶榆,有虫率分别为77.64%、46.91%、24.21%、15.30%、1.41%、1.65%、0.69%。树冠不同层次和方向的受害程度差异显著(P<0.05),树冠中层受害较严重。榆跳象幼虫空间分布型为聚集分布型,并且分布的基本成分为个体群,个体间相互吸引。根据Taylor方法确定了榆跳象幼虫在不同密度下的最适抽样数公式为lgS^2=1.8070+1.7161lgm。The occurrence extent of Rnynchaenus dlni Linnaeus in 4different Ulmus pumila L.woodlands in Urumqi City were investigated.The spatial distribution Rnynchaenus dlni Linnaeus larvae were analyzed by the concentration index and Talor regression method of five different judgment spatial distribtution pattern.The result showed that there were significant differences between the occurrence extent of Rnynchaenus dlni Linnaeus and elm types,50 cm long branches had bug rate of gold leaf Ulmus pumila cv.Jinye〉Ulmus pumila Linn〉Ulmus pumila Linn.cv.pendula〉Ulmus densa Litv 〉Ulmus iaevis Pall〉Ulmus japonica（Rehd.）Sarg.〉Ulmus laciniata（Trautv.）the worm rate were 77.64%,46.91%,24.21%,15.30%,1.41%,1.65%,0.69%,respectively.The harmed extent of the crown had significant differences（P〈0.05）.The middle level of the crown suffered greater injury.The spatial distribution pattern of Rnynchaenus dlni Linnaeus larvae was concentration distribution pattern and the basic distributed composition was individual groups,which attracted each other.According to Taylor method,under different density,the optimal sampling number formula was：lgS^2=1.8070＋1.7161 lgm.

关 键 词：榆跳象 榆树 空间分布型 

分 类 号：S763.3[农业科学—森林保护学]