浅谈蔬菜害虫菜蛾的综合防治

根据综合防治的理论,从农业防治、生物防治、物理机械防治以及化学防治的等方面阐述了如何有效地控制菜蛾对蔬菜的危害。     

社鼠、针毛鼠的种群年龄组成初步研究(啮齿目:鼠科)

社鼠(Rattus niviventer confucianus)和针毛鼠(Rattus fulvescens huang)系福建省山区的山地生活类型的优势啮齿动物,在武夷山自然保护区内尤见广泛分布。它们的种群数量直接左右着保护区山地的鼠群密度。种群年龄组成是种群的重要特征之一。开展种群年龄组成和数量动态的分析研究,将有助于了解种群数量变动的规律,并对种群生态学和群     

温度对花翅摇蚊实验种群的影响

研究了温度对花翅摇蚊的生长发育及繁殖的影响.结果表明,在试验温度范围内,花翅摇蚊各虫态发育历期随温度升高而逐渐缩短,发育速率与温度呈正比关系.花翅摇蚊的世代发育起点温度和有效积温分别为6.68℃和742.97 d·℃.在5个温度条件下,内禀增长力(rm)和周限增长速率(λ)均随温度的升高而增大,至34℃时最大,分别为0.175和1.191.净增殖率(R0)在26℃时最大,平均世代周期(T)和种群数量加倍时间(t)均随温度的升高而缩短,至34℃最短,分别为24.53 d和3.96d.花翅摇蚊对温度较敏感,30～34℃为其种群增长的最适温区.     

杀虫剂对小菜蛾种群的控制作用

通过室内饲养与田间系统调查，应用生命表方法研究了５ 种杀虫剂对小菜蛾种群的控制作用，结果表明：对小菜蛾种群控制作用效果最好的杀虫剂是１ ．８ ％ 集琦虫螨克，其干扰作用控制指数为０．１５４；其次为：菜蛾敌粉剂、１ ％ 农哈哈、２．５％ 功夫和４５ ％ 马拉硫磷，其干扰作用控制指数分别为０ ．１９５ 、０ ．２０７ 、０ ．３０２ 和０．３５９ ．     

气象因子对冬虫夏草寄主蝙蝠蛾成虫行为的影响

为探明气象因子对冬虫夏草寄主蝙蝠蛾成虫繁殖的影响，2017—2021年5年间，统计并记录蝙蝠蛾的成虫羽化数量和产卵量，利用Paerson相关分析对不同气象因子与蝙蝠蛾羽化数量、产卵量的相关性进行研究；采用冗余分析进一步探讨环境因子变量组与蝙蝠蛾成虫羽化数量、产卵量之间的关系。结果表明：降水量与蝙蝠蛾成虫羽化数量及产卵量均呈极显著负相关(P<0.01),日照时数与蝙蝠蛾成虫羽化数量及产卵量均呈极显著正相关(P<0.01),最高气温与蝙蝠蛾成虫羽化数量呈显著正相关(P<0.05),最低气温、平均相对湿度与蝙蝠蛾成虫羽化数量均呈显著负相关(P<0.05)。综上，温度、降水量和日照时数是影响蝙蝠蛾成虫羽化数量和产卵量的主要气象因子。     

红秋葵上斜纹夜蛾的发生规律及控制技术研究

研究了红秋葵上斜纹夜蛾的发生规律及控制技术。结果表明,斜纹夜蛾是红秋葵上发生的主要害虫,其自然种群数量随季节变动,在7—8月达为害的高峰,温度升高明显有利于其种群数量的增长．种群数量变动与温度呈密切正相关,其回归关系式为：Y。=17．4924＋0．2031X．-0．0005942X;;浓度为1gDW／l（10mL的柑橘、艾蒿提取物喷施后．药后3d的校正防效分别为83．69％、82．22％,其次是曼陀罗、蓖麻和蛇床子提取物喷施后,药后3d的校正防效分别为78．81％、72．96％和71．04％。     

山东农田黑线仓鼠种群数量动态及预测预报的初步研究

本文着重研究了黑线仓鼠(Cricetulus barabensis)种群内部因素及环境因子对其种群数量变化的影响,其中4月份的平均胎仔数与当年7～12月份种群数量高峰相关性显著,是预测预报的基础;环境因子中8月份月均气温及极端降水量影响害鼠的怀孕率、胎仔数等,对其种群数量变动有一定影响作用。     

拉萨地区小云雀种群数量和分布的季节变动

研究拉萨地区小云雀种群数量分布和季节变动后表明:(1)Alauda gulgula inopinata 在拉萨地区为留鸟,部分个体迁徙;(2)以草甸、沼泽草甸和农作区为最适生活环境;(3)种群具明显的季节消长.     

山核桃透翅蛾幼虫空间分布型及抽样技术

【目的】确定山核桃透翅蛾(Sphecodoptera sheni)幼虫在薄壳山核桃(Carya illinoinensis)树上的空间分布型及抽样技术。【方法】采用频次分布法、6种聚集度指标(C、I、K、C_A、M^*/M、I_δ)、Taylor幂法则和Iwao回归方程对山核桃透翅蛾幼虫在薄壳山核桃大树上的空间分布型和抽样技术进行研究,计算Blackith聚集均数λ,分析山核桃透翅蛾幼虫种群的聚集原因。【结果】山核桃透翅蛾幼虫在薄壳山核桃上呈聚集分布,分布的基本成分为个体群,聚集度随种群密度升高而增大。山核桃透翅蛾幼虫种群聚集是由环境条件和自身特性共同引起的。【结论】建立山核桃透翅蛾幼虫种群的理论抽样表和序贯抽样公式,可为该虫害的抽样调查和防治提供理论依据。     

5种林分中性信息素对亚洲型舞毒蛾的诱捕作用

【目的】亚洲型舞毒蛾雌蛾飞行能力较强且寄主范围广,存在较大的潜在危害。探究亚洲型舞毒蛾在不同林分中的发生规律,并分析不同气象因素对其诱捕的影响,以此为亚洲型舞毒蛾的有效防控提供参考。【方法】利用人工合成的舞毒蛾性信息素(+)-Disparlure作为诱芯进行林间诱捕试验,分析不同林分中诱捕的雄蛾数量以及不同天气林间诱捕量。【结果】在榆树(Ulmus pumila)、白桦(Betula platyphylla)、蒙古栎(Quercus mongolica)、樟子松(Pinus sylvestris var. mongilica)和兴安落叶松(Larix gmelinii)等5种林分中,用性信息素诱芯分别诱捕到舞毒蛾雄蛾34、30、29、9、15头,在榆树林、白桦林和蒙古栎林中的诱捕量与其他两种林分中的诱捕量差异显著(P<0.05,n=3)。在榆树林中最先到达雄蛾的诱捕始盛期。在榆树林、白桦林和兴安落叶松林中最先到达雄蛾的诱捕高峰期,其次为樟子松林和蒙古栎林。各林分中到达雄蛾诱捕盛末期的时间接近。气象因子对诱蛾量有明显的影响,风力为三级时与一级、二级相比,诱蛾量显著减少。日最高和最低温度均会影响诱蛾量,对温度与诱蛾量之间进行相关性拟合,发现日最低温度为14～23 ℃时,诱捕量与日最低温度呈线性正相关,日平均诱捕量随着日最低温度的升高而增大。【结论】舞毒蛾的发生情况受到林地内寄主植物、风力和气温的影响。榆树林中诱捕到的舞毒蛾数量最多,樟子松林中最少。风力过大会导致诱蛾量显著降低,日最高气温在26～30 ℃是舞毒蛾雄蛾活动的最适温度范围。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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