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新疆地域辽阔,草地资源丰富,草原面积0.57亿hm2,可利用草原面积近0.47亿hm2,位居全国第三。由于新疆地处三山夹两盆的特殊地理位置,复杂多样的生态环境为蝗虫的发生提供了十分有利的条件。据1986～1991年新疆草原优势种蝗虫区域划分调查统计:新疆有蝗虫发生面积395.70万hm2,其中严重地区面积270.45万hm2,蝗虫发生面积占新疆草原可利用面积的8.5%。据区划调查鉴定,新疆约有蝗虫种类160余种,其中优势种蝗虫种类10多种,形成危害的蝗虫种类主要有意大利蝗、伪星翅蝗、黑腿星翅蝗、西伯利亚蝗、亚洲飞蝗、黑条小车蝗、戟纹蝗、小翅曲背蝗、宽须蚁蝗等,它们此起彼伏交替发生,严重影响着新疆畜牧业生产的健康稳定发展。由于新疆特殊的地理构成,为草原蝗虫生物防治技术的研究和推广应用提供了十分有利的条件。多年来,新疆在草原蝗虫综合防治技术研究与推广应用方面做了大量卓有成效的的工作。本文对上世纪80年代以来新疆蝗虫综合防治技术的试验研究与推广应用情况进行了汇总,把牧鸡治蝗、牧鸭治蝗、人工招引粉红椋鸟控制蝗害、蝗虫微孢子虫治蝗、蝗虫痘病毒治蝗、绿僵菌控制蝗虫、印楝素治蝗等多种蝗虫生物防治技术与化学防治技术应用进行了对比,分析总结了蝗虫综合防治技术在新疆蝗虫防治中的防治效果和应用优缺点,对新疆草原蝗虫防治走以生物防治技术为主的可持续发展道路提供了一些可借鉴的经验。 相似文献
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海北州是草地蝗虫灾害频发的地区之一,每年的蝗虫危害面积广、密度高、危害严重。本文从蝗虫的发生数量、危害程度、损失状况等方面进行了详细的调查,并结合实际,对草原蝗虫的生态学特性进行了分析研究,为今后更好的开展草地虫害监测、提高预测预报准确率提供了依据。 相似文献
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草地蝗虫发生原因及可持续管理对策 总被引：8，自引：0，他引：8
本研究探讨了影响草地蝗虫数量动态变化的主要因素,并就如何实现草地蝗虫的可持续管理对策做了较为系统全面的概述。认为全球气候温暖化、干旱化以及区域性气候异常,食物资源,种间种内竞争,环境因子以及草地利用方式和强度等是导致草地蝗虫数量动态变化以及可能引发蝗虫灾害的主要原因。同时提出基于生态安全、经济有效和草地生态系统可持续发展的原则作为管理草地蝗虫的指导方针。最后,将强化蝗虫发生机理及预测预报技术研究,积极探索草地管理措施在调节蝗虫数量中发挥作用,尝试草地蝗虫管理新的方法和技术,扩大生物防治范围和力度并确立新型化学防治技术作为实现草地蝗虫可持续管理的主要措施。 相似文献
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蝗虫微孢子（Paranosema locustae, PL）是重要的防蝗生物制剂,其与昆虫生长调节剂（insect growth regulator, IGR）协同使用有利于蝗虫可持续治理。本文通过田间超低喷雾和扫网调查等方法在青海蝗区开展协调应用PL和IGR防治草原蝗虫的作用及其机理研究。首先明确青海蝗区的主要蝗虫种类为宽须蚁蝗Myrmeleotettix palpalis、小翅雏蝗Chorthippus fallax、狭翅雏蝗Chorthippus dubius、毛足棒角蝗Dasyhippus harbipes、鼓翅皱膝蝗Angaracris barabensis等;结果证明PL与IGR协调应用,可有效抑制草原蝗虫种群增长,且可保持存活蝗虫感病率在较高水平,对优势种宽须蚁蝗和小翅雏蝗等的持续控制作用明显。结果明确了微生物制剂和IGR协同防治蝗虫的短期与长期、速效与长效的协同作用,为防治高密度蝗虫提供新的绿色防控策略。 相似文献
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甘肃省草地蝗虫研究现状 总被引：2，自引：0，他引：2
蝗虫是甘肃省主要的草地害虫，近年来，草原保护工作者对甘肃的草地蝗虫进行了深入而系统的研究。根据研究内容，本文从种类及区系、发生规律、种群动态及群落结构、食性及食量、经济阈值及防治技术研究等五个方面综述了甘肃草地蝗虫研究进展。 相似文献
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RICHARD BURGESS BVM&S STEVE ELDER BS MS PhD RON McLAUGHLIN DVM DVSc Diplomate ACVS PETER CONSTABLE BVSc MS PhD Diplomate ACVIM 《Veterinary surgery : VS》2010,39(2):208-215
Objective— To compare biomechanical properties of 3 new generation polyethylene sutures (FiberTape [FT], FiberWire [FW], and OrthoFiber [OF]) with nylon leader line (NL) for use during extraarticular fixation of cranial cruciate deficient stifles. Study Design— In vitro biomechanical testing of suture loops under monotonic tensile and cyclical loading until failure. Sample Population— Constructs of FT, FW, OF, and NL. Methods— Twenty loops of each of 12 combinations of fixation and suture had monotonic tensile and cyclical loading. Two knotting techniques (square knot [SQ], slip knot [SL]) and a crimp clamp (CR) system were evaluated. Elongation, stiffness, and strength of constructs was tested. The main effects of group, loop material, and their interaction were evaluated. Results— Knotted FT, FW, and OF had less elongation than knotted NL under monotonic tensile and cyclical loading. Under monotonic tensile loading, knotted FT and OF were stiffer than knotted NL. CR FT, CR FW, and CR OF were stiffer than CR NL and CR FT, CR FW, and CR OF were stiffer than knotted FT, FW, and OF. FW and OF knotted loops were weaker than knotted NL. CR FT was stronger than CR NL. CR FT and CR OF were weaker than knotted FT and OF. Conclusions— Polyethylene sutures are stronger, stiffer and elongate less than nylon leader. Crimping suture alters the biomechanical properties of the loop. Clinical Relevance— FW, FT, and OF may perform better in reconstructive procedures, where increased strength and stiffness are considered to be beneficial. 相似文献
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《Australian veterinary journal》1974,50(8):371-372
Book reviewed in this article:
VIRUSES OF VERTEBRATES
DISEASES OF FUR ANIMALS
OPHTHALMIC SURGERY OF DOMESTIC ANIMALS
ONCOGENESIS AND HERPESVIRUSES
EQUINE MEDICINE AND SURGEY 相似文献
VIRUSES OF VERTEBRATES
DISEASES OF FUR ANIMALS
OPHTHALMIC SURGERY OF DOMESTIC ANIMALS
ONCOGENESIS AND HERPESVIRUSES
EQUINE MEDICINE AND SURGEY 相似文献
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《Veterinary dermatology》1990,1(4):207-210
Book reviewed in this article:
EICOSANOIDS AND THE SKIN. T. Ruzicka (ed).
A COLOUR ATLAS OF DERMATO-IMMUNOHISTOCYTOLOGY Hiroaki Ueki, Hideo Yaoita (eds).
HISTOPATHOLOGY OF THE SKIN, 7th Edition. Walter F. Lever, Gundula Schaumberg-Lever.
COLOUR ATLAS OF HISTOPATHOLOGY OF THE SKIN. Gundula Schaumberg-Lever, Walter F. Lever.
DERMATOLOGY IN PRACTICE. Anthony du Vivier. 相似文献
EICOSANOIDS AND THE SKIN. T. Ruzicka (ed).
A COLOUR ATLAS OF DERMATO-IMMUNOHISTOCYTOLOGY Hiroaki Ueki, Hideo Yaoita (eds).
HISTOPATHOLOGY OF THE SKIN, 7th Edition. Walter F. Lever, Gundula Schaumberg-Lever.
COLOUR ATLAS OF HISTOPATHOLOGY OF THE SKIN. Gundula Schaumberg-Lever, Walter F. Lever.
DERMATOLOGY IN PRACTICE. Anthony du Vivier. 相似文献
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MICHAEL GIBB 《Journal of veterinary pharmacology and therapeutics》1988,11(2):227-229
DISEASES OF THE THORAX – RADIOGRAPHIC DIAGNOSIS. Peter F. Suter, Juan A. Gomez
RADIOLOGY OF SKELETAL DISEASE – PRINCIPLES OF DIAGNOSIS IN THE DOG. J. P. Morgan 相似文献
RADIOLOGY OF SKELETAL DISEASE – PRINCIPLES OF DIAGNOSIS IN THE DOG. J. P. Morgan 相似文献
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亚抑菌浓度黏菌素(Sub-Colistin)处理质控菌(ATCC25922)及氧氟沙星(OF)耐药大肠杆菌(29-2),分析处理前后外膜蛋白(OMP)表达量、OF摄入量及敏感性的差异。结果:菌株29-2的OMP缺失,Sub-Colistin处理后:质控菌外膜蛋白表达量由50.92mg/mL降至20.45mg/mL,29-2由0.0397mg/mL增至25.52mg/mL;受试菌株OF摄入量随测定时间不同升高约0.5ng/mg～1.6ng/mg;对OF敏感性升高1倍。说明Sub-Colistin可使29-2外膜蛋白表达量显著增加,OF摄入量及敏感性变化均不明显,OMP表达量不是导致29-2对OF耐药的决定原因。 相似文献
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Factors associated with the prevalence of osseous fragments (OF) in fetlock and hock joints were investigated in a population of young Hanoverian Warmblood horses selected for sale at auction from 1991 to 1998. The study was based on results of a standardized radiological examination of 3127 horses. The prevalences of OF in the two joints were significantly dependent on the date, type and quality of the auction, the region of origin and on the anticipated suitability of the horses for dressage and/or show-jumping. The probability of finding OF increased with wither-height. Furthermore, there was a significant association of the individual sire with the prevalence of OF in both fetlock and hock joints, and of the maternal grandsire with the prevalence of OF in the hock joints. Consequently, both non-genetic and genetic parameters should be taken into account in order to reduce the prevalence of OF in young Warmblood riding horses. 相似文献