摘要
对2021—2024年哈尔滨市榆绿毛萤叶甲(Pyrrhalta aenescens)的室内观察与林间监测数据,系统分析了其生活史、发育历程及影响因素。研究结果表明:(1)室内观测该虫不同虫态发育历期呈现显著差异,整个世代发育历期为61.853 d。(2)野外观测哈尔滨地区榆绿毛萤叶甲1 a发生2代,以成虫越冬。越冬代4月上旬活动,第1代幼虫6—7月发育,第2代因低温限制部分个体未成熟越冬,其发育周期受环境影响显著。(3)该虫在哈尔滨地区的种群分布存在显著的空间差异性,具体表现为树冠中上部分布较多,并且种群呈现出向林区边缘处逐步减少的趋势。(4)向阳坡面虫口密度高于背阴坡面,幼龄林的虫口密度显著高于成熟林,地被植物越少、郁闭度越低的林分虫口密度越大。(5)在哈尔滨地区,4—7月的平均降水量与榆绿毛萤叶甲种群的动态变化存在显著关联,即降水量越大,害虫的繁殖和扩散能力越强,其对榆树的危害性也越显著。
Based on indoor observations and forest monitoring data of Pyrrhalta aenescens in Harbin from 2021 to 2024,this study systematically analyzed its life history,developmental process,and influencing factors.The results showed that:(1)Significant differences were observed in the developmental durations of different life stages under indoor conditions,with the entire generation taking 61.853 days.(2)In the field,this insect completes two generations annually in Harbin and overwinters as adults.Overwintering adults become active in early April.The first-generation larvae develop from June to July.Due to low temperatures,some individuals of the second generation overwinter before reaching maturity.Environmental factors significantly influence their developmental cycles.(3)The population distribution of this insect in the Harbin area shows significant spatial differences.Higher densities are found in the upper and middle parts of tree canopies,and the population gradually decreases towards the forest edges.(4)Insect density is higher on sunny slopes than on shaded slopes,significantly higher in young forests than in mature forests.The less ground cover plants and the lower the canopy density of the forest stand,the greater the insect population density.(5)In Harbin,the average precipitation from April to July significantly correlates with population dynamic changes.That is,the greater the precipitation,the stronger the reproduction and diffusion ability of pests,and the more significant the damage they cause to Ulmus pumila.
作者
高宇
张睿
遇文婧
Gao Yu;Zhang Rui;Yu Wenjing(Forest Protection Institute of Heilongjiang Province,Harbin 150040,P.R.China;Northeast Forestry University)
出处
《东北林业大学学报》
北大核心
2025年第8期121-125,共5页
Journal of Northeast Forestry University
基金
黑龙江省省属科研院所科研业务费项目(LKSB2024-4)。
关键词
哈尔滨市
榆绿毛萤叶甲
榆树
生活史
发生规律
Harbin City
Pyrrhalta aenescens
Ulmus pumila
Life history
Occurrence rule
作者简介
第一作者:高宇,女,1982年3月生,黑龙江省森林保护研究所,助理研究员。E-mail:gaoyu811127@163.com;通信作者:遇文婧,黑龙江省森林保护研究所,研究员。E-mail:ywjlinda2008@163.com。
