Imidacloprid as a contact arrestant for larvae of the European chafer,Amphimallon majale     

Gengping Zhu  Matthew J Petersen  Guoqing Liu  Daniel C Peck 《Pest management science》2013,69(4):483-492

BACKGROUND: Manipulative studies of the behavioral response of soil‐dwelling insects to insecticides and other antagonists are stymied by the difficulties of observing and interpreting interactions played out below ground. Six experiments were carried out using X‐ray radiography to quantify the movement of the European chafer, Amphimallon majale (Razoumowsky), larvae in response to imidacloprid and how this was affected by host plant cues and cold temperature. RESULTS: The movement of third instars was arrested in imidacloprid‐treated soil at ≥ 0.6 ppm concentration. At ≥ 0.8 ppm, the arrestant effect of imidacloprid was stronger than the attraction cue posed by germinating grass seed. There was a less disruptive effect on dispersal distance in vertical versus lateral panels. In vertical panels, there was a less disruptive effect on downward movement under a cold temperature treatment that simulated overwintering conditions. CONCLUSION: Larvae of A. majale do not remotely detect imidacloprid in the soil; they neither evade contact, nor are repelled after contact. Imidacloprid thereby acts as a contact arrestant to disrupt grub movement. This finding might help to explain the synergistic effect of imidacloprid in combination with other biological agents for white grub control, and its effects on grub overwintering behavior. © 2012 Society of Chemical Industry  相似文献   

数字普惠金融、过度负债与家庭财务风险     

郑美华  孔的漩 《安徽农业大学学报》2024,33(1):64-75

数字普惠金融在降低家庭金融准入门槛的同时也增加了家庭的财务风险。基于CHFS2013-2019年微观调查数据进行实证检验,以家庭过度负债为研究重点分析数字普惠金融对家庭财务风险的影响,探究数字普惠金融对家庭部门财务风险的影响机制与作用路径。研究发现,数字普惠金融通过增加家庭高风险型债务的方式扩大家庭过度负债风险,进而导致家庭偿债能力与资产流动性降低,增大家庭财务风险。进一步研究发现,中低收入家庭与农村家庭等财务弱势家庭更易受到数字普惠金融影响从而导致过度负债与财务风险扩大。政府应完善数字金融监管制度,加强社会金融福利保障体系建设,引导数字普惠金融市场良性发展。  相似文献   

后金融危机时期中国农业科技发展若干问题的思考——高度重视原始创新，抢占农业科技前沿领域的制高点   总被引：3，自引：0，他引：3  

薛亮  梅旭荣  王济民  汪飞杰  陆建中  吴敬学  聂凤英  沈银书  张雨  夏旭 《中国农业科学》2013,46(13):2808-2820

2008年美国爆发金融危机后,欧债危机随后爆发,新兴经济体也受到严重冲击,世界经济增速放缓。历史经验表明,经济危机往往孕育着新的科技革命。在经济全球化的背景下,谁能在科技创新方面占据优势,谁就能够掌握发展的主动权,率先复苏并走向繁荣。而作为基础产业的农业和农业科技进步对中国经济发展具有举足轻重的作用。为此,应充分抓住金融危机给农业科技发展带来的机遇,高度重视科技原始创新能力的培养,要做到遵循农业科研规律,优化配置农业基础科技资源,强化农业基础研究和高新技术研究,提升农业核心技术研发水平,加快完善科学评价体系,超前部署一批前瞻性科技专项,增强科技战略储备能力,抢占以生物技术、信息技术、先进制造技术等为核心的农业科技前沿领域的制高点,以科技创新促进现代农业发展。  相似文献   

Dental restoration of a canine tooth in a dog     

W.M. Nicholls  R.C.J. MacKay 《New Zealand veterinary journal》2013,61(3):122-123

Extract

There was a history of discomfort following fracturc of the lower right canine tooth.  相似文献   

外围国家如何破除资本主义系统性危机的影响——基于萨米尔·阿明依附理论的分析     

卢地生 《安徽农业大学学报》2020,29(2):102-109

萨米尔·阿明的依附理论揭示了资本主义系统性危机的实质和危害，提出外围国家唯有与中心国家"脱钩"，才能摆脱资本主义体系并构建一个社会主义世界。中心国家的经济长期停滞，自我调适措施又引发新的矛盾，使当代资本主义日益走向内外交困的衰落境地。外围国家在经济、政治、文化、军事等方面遭受着中心国家侵略，深受资本主义系统性危机的影响，现代化建设十分困难。只有独立自主地走适合民族自身发展的道路，坚持对外开放，坚持合作共赢，主动防范外部风险，外围国家才能斩断与中心国家的被动依附关系，实现平等发展，破除资本主义系统性危机的影响。  相似文献   

节水灌溉的迫切性及其评价指标与分析   总被引：1，自引：0，他引：1  

邓绍云  文俊 《云南农业大学学报(自然科学版)》2004,19(4):423-427

 就全球面临水资源匮缺的严峻形势,分析中国水资源分布现状及目前水情危机的状况,呼吁节约用水、提倡节水灌溉。从节水灌溉定义的内涵出发,指出推广实施节水灌溉的迫切性并提出节水灌溉的评价指标,且对其进行科学分析。  相似文献   

进入21世纪中国管理的新趋势   总被引：1，自引：0，他引：1  

牟晓娜  王立民 《吉林农业科技学院学报》2006,15(1):21-22,54

伴随着21世纪的脚步,世界经济正从工业经济向知识经济转变,人类社会的发展也随之进入一个快速变化的知识经济时代,管理也将发生根本性的变化。21世纪管理发展趋势是创新管理的发展,危机管理的兴起,信息管理和知识管理的普及,可持续发展管理的出现。  相似文献   

建立动物生存新环境,发展现代生态大畜牧业——从生态学角度探讨我国畜牧业的发展趋势     

黄保续  郭翔宇 《东北农业大学学报》1997,(2)

从动物生存环境的生态危机出发，提出了现代生态大畜牧的概念，阐述了发展生态大畜牧的必要性，并就其基本原则和发展战略作了初步探讨。  相似文献   

国内图书馆危机管理研究的背景、现状与方向     

莫泽瑞 《农业图书情报学刊》2007,19(8):30-33,48

分析和揭示国内图书馆危机管理的研究背景，介绍已有的研究状况，预测和指明今后研究的主要方向．为图书馆界同仁提供有益参考。  相似文献   

The factualization of uncertainty: Risk,politics, and genetically modified crops – a case of rape     

Gitte?MeyerEmail author  Anna?Paldam?Folker  Rikke?Bagger?J?rgensen  Martin?Krayer?von?Krauss  Peter?Sand?e  Geir?Tveit 《Agriculture and Human Values》2005,22(2):235-242

Mandatory risk assessment is intended to reassure concerned citizens and introduce reason into the heated European controversies on genetically modified crops and food. The authors, examining a case of risk assessment of genetically modified oilseed rape, claim that the new European legislation on risk assessment does nothing of the sort and is not likely to present an escape from the international deadlock on the use of genetic modification in agriculture and food production. The new legislation is likely to stimulate the kind of emotive reactions it was intended to prevent. In risk assessment exercises, scientific uncertainty is turned into risk, expressed in facts and figures. Paradoxically, this conveys an impression of certainty, while value-disagreement and conflicts of interest remain hidden below the surface of factuality. Public dialogue and negotiation along these lines are rendered impossible. The only option left to critics is to resort to claims of fear and to call for new risk assessments to be performed, on and on again. Science is allowing itself to be abused by accepting the burden of proof in matters more suited to reflection and negotiation. The specific challenge to science would be to take care of itself – rethinking the role and the limitations of science in a social context, and, thereby gaining the strength to fulfill this role and to enter into dialogue with the rest of society. Scientific communities appear to be obvious candidates for prompting reflection and dialogue on this issue.  相似文献