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天下遍奏《西凉》乐 四郡俱作词牌名──兼论唐代文人词的发端及其演变轨迹 被引量:4
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作者 杨国学 王春玲 《河西学院学报》 2002年第1期33-37,共5页
原河西四郡自魏晋南北朝到晚唐五代,音乐歌舞极盛,故四郡州郡名全都被用为词牌名,即《敦煌曲子》、《酒泉子》、《甘州子》、《凉州令》。其中《凉州令》的前身当为《凉州词》。从内容上看,《凉州词》基本上都是边塞歌词而不一定都... 原河西四郡自魏晋南北朝到晚唐五代,音乐歌舞极盛,故四郡州郡名全都被用为词牌名,即《敦煌曲子》、《酒泉子》、《甘州子》、《凉州令》。其中《凉州令》的前身当为《凉州词》。从内容上看,《凉州词》基本上都是边塞歌词而不一定都与凉州有关,它应属音乐曲调名而不像是诗题,并且很可能是唐教坊大曲《凉州》的截曲,属于和《竹枝词》、《杨柳枝词》同类、与七绝同构的亦诗亦词的作品。辨析《凉州词》这类亦诗亦词的创作现象,对揭示唐代文人词的起源有一定意义。 展开更多
关键词 词牌 历史演变 河西四郡 《凉州词》 唐代 文人词 起原 《凉州令》 《甘州子》 《酒泉子》
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海南儋州传统体育“调声”起源与变异
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作者 王健 《当代体育科技》 2013年第16期134-134,136,共2页
儋州"调声"产生于西汉时期,发源于儋州市北部沿海。是一种以儋州方言演唱,配合体育舞蹈动作的汉族民间歌舞。"调声"的内容以表达爱情、幸福生活为主。儋州调声突破了山歌原有的表现形式,层出不穷的曲调,演唱过程活... 儋州"调声"产生于西汉时期,发源于儋州市北部沿海。是一种以儋州方言演唱,配合体育舞蹈动作的汉族民间歌舞。"调声"的内容以表达爱情、幸福生活为主。儋州调声突破了山歌原有的表现形式,层出不穷的曲调,演唱过程活跃,不管是唱词、旋律、节奏、曲调及调式,都符合青年人的性格特征,是广大群众非常喜欢的一项活动形式。 展开更多
关键词 海南儋州 调声 起原与变异
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科左后旗布鲁氏杆菌病流行情况调查及流行动态分析 被引量:1
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作者 安慧敏 《内蒙古民族大学学报》 2007年第5期44-45,共2页
本文综合调查分析了科左后旗布鲁氏杆菌病疫情历史来源和流行情况,阐述了近年旗内布病疫情出现死灰复燃趋势的根本原因,对今后科左后旗布鲁氏杆菌病的防控提出了相应的措施。
关键词 科左后旗 布病疫情 起原 动态 防控
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蒙医疗法的起源初探 被引量:1
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作者 刘春甫 陈玉华 王向阳 《中国民族医药杂志》 2009年第1期65-66,共2页
蒙医药学属于传统医学范畴;它是祖国医学宝库中的一颗明珠。它的历史源远流长,大约可追溯到旧石器时代,到了新石器时代,蒙古人为了保护自己,穿皮毛衣服。随着火的发明,不仅用火来防御寒冷,还利用火煮肉,大大地促进脑的发育。早... 蒙医药学属于传统医学范畴;它是祖国医学宝库中的一颗明珠。它的历史源远流长,大约可追溯到旧石器时代,到了新石器时代,蒙古人为了保护自己,穿皮毛衣服。随着火的发明,不仅用火来防御寒冷,还利用火煮肉,大大地促进脑的发育。早在春秋战国时期,远古时期的蒙古人,居住在祖国的西北边疆,在寒冷的环境条件下,因多食生食。 展开更多
关键词 蒙医疗法 起原 初探
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Isolation and Chromosomal Mapping of a Corn B Chromosome Specific RAPDs 被引量:3
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作者 祁仲夏 李秀兰 +2 位作者 陈成彬 宋文芹 陈瑞阳 《Acta Botanica Sinica》 CSCD 2002年第4期499-501,共3页
B染色体存在于多种动植物中 ,具有很多独特的性状。B染色体与正常染色体在DNA组成方面十分相似 ,寻找B染色体特异序列一直是B染色体研究的难点和热点。通过对含有和不含有B染色体的两种玉米 (ZeamaysL .)基因组进行了RAPD分析 ,筛选到一... B染色体存在于多种动植物中 ,具有很多独特的性状。B染色体与正常染色体在DNA组成方面十分相似 ,寻找B染色体特异序列一直是B染色体研究的难点和热点。通过对含有和不含有B染色体的两种玉米 (ZeamaysL .)基因组进行了RAPD分析 ,筛选到一个B染色体特异性分子标记B480。该标记与玉米的自主复制起始序列ARS1和ARS2同源 ,特别是该序列中的 2 5bp出现在多种模式生物基因组中。FISH的结果显示 。 展开更多
关键词 corn B chromosome RAPD fluoresent in situ hybridization (FISH) autonomously replicating sequence (ARS)
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Derivatives of 3(5),4-Dinitropyrazole as Potential Energetic Plasticisers 被引量:6
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作者 Stefan Ek Larisa Yudina Wahlstrom Nikolaj Latypov 《Journal of Chemistry and Chemical Engineering》 2011年第10期929-935,共7页
The development of a pseudo-one pot synthesis of 3(5),4-dinitropyrazole enabled us to use it as a starting material for energetic plasticisers. Its acidic proton allowed simple derivatisation on one of the ring nitr... The development of a pseudo-one pot synthesis of 3(5),4-dinitropyrazole enabled us to use it as a starting material for energetic plasticisers. Its acidic proton allowed simple derivatisation on one of the ring nitrogens. The thermal characteristics of two derivatives were evaluated. For instance, the N-allyl compound was a liquid with very low glass transition temperature, whereas the N-propargyl compound was a sticky solid at ambient temperature. The two compounds were both thermally stable according to STANAG 4582. 展开更多
关键词 SYNTHESIS characterisation energetic plasticisers: 3(5) 4-dinitropyrazole
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An Information Diffusion Technique for Fire Risk Analysis 被引量:1
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作者 刘静 黄崇福 《Journal of Donghua University(English Edition)》 EI CAS 2004年第3期54-57,共4页
There are many kinds of fires occurring under different conditions. For a specific site, it is difficult to collect sufficient data for analyzing the fire risk. In this paper, we suggest an information diffusion techn... There are many kinds of fires occurring under different conditions. For a specific site, it is difficult to collect sufficient data for analyzing the fire risk. In this paper, we suggest an information diffusion technique to analyze fire risk with a small sample. The information distribution method is applied to change crisp observations into fuzzy sets, and then to effectively construct a fuzzy relationship between fire and surroundings. With the data of Shanghai in winter, we show how to use the technique to analyze the fire risk. 展开更多
关键词 Fire risk Small sample Information distribution Fuzzy relationship
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Assessing the Impacts of Initial Snow Conditions over the Tibetan Plateau on China Precipitation Prediction Using a Global Climate Model 被引量:1
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作者 CHEN Hong 《Atmospheric and Oceanic Science Letters》 CSCD 2014年第2期81-86,共6页
Two ensemble experiments were conducted using a general atmospheric circulation model. These experiments were used to investigate the impacts of initial snow anomalies over the Tibetan Plateau(TP) on China precipitati... Two ensemble experiments were conducted using a general atmospheric circulation model. These experiments were used to investigate the impacts of initial snow anomalies over the Tibetan Plateau(TP) on China precipitation prediction. In one of the experiments, the initial snow conditions over the TP were climatological values; while in the other experiment, the initial snow anomalies were snow depth estimates derived from the passive microwave remote-sensing data. In the current study, the difference between these two experiments was assessed to evaluate the impact of initial snow anomalies over the TP on simulated precipitation. The results indicated that the model simulation for precipitation over eastern China had certain improvements while applying a more realistic initial snow anomaly, especially for spring precipitation over Northeast China and North China and for summer precipitation over North China and Southeast China. The results suggest that seasonal prediction could be enhanced by using more realistic initial snow conditions over TP, and microwave remote-sensing snow data could be used to initialize climate models and improve the simulation of eastern China precipitation during spring and summer. Further analyses showed that higher snow anomalies over TP cooled the surface, resulting in lower near- surface air temperature over the TP in spring and summer. The surface cooling over TP weakened the Asian summer monsoon and brought more precipitation in South China in spring and more precipitation to Southeast China during summer. 展开更多
关键词 Tibetan Plateau initial snow anomalies predictive skill precipitation
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Characterization of Giardia cell nucleus:Its implication on the nature and origin of the primitive cell nucleus 被引量:3
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作者 LI JINGYAN (Department of Evolutionary Cell Biology, Laboratory of Cellular and Molecular Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.) 《Cell Research》 SCIE CAS CSCD 1995年第1期115-124,共10页
关键词 Origin of cell nucleus nucleus of Giardia primitive cell nucleus archezoa
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Trial Production of Needle Coke at Shanghai Petrochemical Company 被引量:1
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《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2015年第4期120-120,共1页
Needle coke is the starting material for manufacture of premium graphite electrode,which at present cannot be produced by SINOPEC and even other domestic refining enterprises so that the carbon producing plants inside... Needle coke is the starting material for manufacture of premium graphite electrode,which at present cannot be produced by SINOPEC and even other domestic refining enterprises so that the carbon producing plants inside China have to import a significant amount of high-quality needle coke every year. 展开更多
关键词 premium manufacture graphite producing import refining starting Petroleum heating slurry
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Hidden Symmetries for Thermodynamics and Emergence of Relativity 被引量:1
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作者 赵柳 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第10期641-646,共6页
Erik Verlinde recently proposed an idea about the thermodynamic origin of gravity.Though this is abeautiful idea, which may resolve many long standing problems in the theories of gravity, it also raises many otherprob... Erik Verlinde recently proposed an idea about the thermodynamic origin of gravity.Though this is abeautiful idea, which may resolve many long standing problems in the theories of gravity, it also raises many otherproblems.In this article I will comment on some of the problems of Verlinde’s proposal with special emphasis on thethermodynamical origin of the principle of relativity.It is found that there is a large group of hidden symmetries ofthermodynamics, which contains the Poincare group of the spacetime for which space is emergent.This explains thethermodynamic origin of the principle of relativity. 展开更多
关键词 emergent gravity THERMODYNAMICS GEOMETRY principle of relativity
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Magnitude and Forming Factors of Mass Elevation Effect on Qinghai-Tibet Plateau 被引量:2
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作者 ZHANG Shuo ZHANG Baiping +4 位作者 YAO Yonghui ZHAO Fang QI Wenwen HE Wenhui WANG Jing 《Chinese Geographical Science》 SCIE CSCD 2016年第6期745-754,共10页
Mass elevation effect (MEE) refers to the thermal effect of huge mountains or plateaus, which causes the tendency for tem- perature-related montane landscape limits to occur at higher elevations in the inner massifs... Mass elevation effect (MEE) refers to the thermal effect of huge mountains or plateaus, which causes the tendency for tem- perature-related montane landscape limits to occur at higher elevations in the inner massifs than on their outer margins. MEE has been widely identified in all large mountains, but how it could be measured and what its main forming-factors are still remain open. This paper, supposing that the local mountain base elevation (MBE) is the main factor of MEE, takes the Qinghai-Tibet Plateau (QTP) as the study area, defines MEE as the temperature difference (AT) between the inner and outer parts of mountain massifs, identifies the main forming factors, and analyzes their contributions to MEE. A total of 73 mountain bases were identified, ranging from 708 m to 5081 m and increasing from the edges to the central parts of the plateau. Climate data (1981-2010) from 134 meteorological stations were used to acquire ATby comparing near-surface air temperature on the main plateau with the free-air temperature at the same altitude and simi- lar latitude outside of the plateau. The AT for the warmest month is averagely 6.15 ~C, over 12~C at Lhatse and Baxoi. A multivariate linear regression model was developed to simulate MEE based on three variables (latitude, annual mean precipitation and MBE), which are all significantly correlated to AT. The model could explain 67.3% of MEE variation, and the contribution rates of three independent variables to MEE are 35.29%, 22.69% and 42.02%, respectively. This confirms that MBE is the main factor of MEE. The intensive MEE of the QTP pushes the 10~C isotherm of the warmest month mean temperature 1300-2000 m higher in the main plateau than in the outer regions, leading the occurrence of the highest timberline (4900 m) and the highest snowline (6200 m) of the Northern Hemisphere in the southeast and southwest of the plateau, respectively. 展开更多
关键词 Qinghai-Tibet Plateau mass elevation effect (MEE) temperature difference mountain base elevation TIMBERLINE
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Preparation and Performance of Overbased Complex Sulphonates
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作者 Hou Dianguo 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2010年第1期38-42,共5页
Overbased complex sulphonates containing two metals -- sodium and magnesium -- were prepared by using overbased magnesium sulphonate as the starting material. Borated overbased complex sulphonate containing two metals... Overbased complex sulphonates containing two metals -- sodium and magnesium -- were prepared by using overbased magnesium sulphonate as the starting material. Borated overbased complex sulphonate containing two metals was synthesized by reaction of boric acid with the corresponding sulphonate. The total base number (TBN) of overbased complex sulphonates decreased compared with that of magnesium sulphonate, while TBN of borated overbased complex sulphonate further decreased. The detergency, anti-oxidation and extreme pressure performances of overbased complex sulphonates were improved compared with those of overbased magnesium sulphonate; the anti-oxidation and extreme pressure performances of borated overbased complex sulphonates were further improved whereas its detergency was reduced. 展开更多
关键词 overbased complex sulphonate borate: preparation PERFORMANCE
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ANALYSISOFOPERATIONALCAUSESOFAIRPLANETAKEOFFACCIDENTS
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作者 Ang Haisong Department of Aircraft Engineering, NUAA29 Yudao Street, Nanjing 210016, P. R. China 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1996年第1期26-31,共6页
The possibility and causes of flight accidents by operational error/deviation in takeoff are analyzed in this paper. The following three stages are each described individually: before liftoff, near liftoff and initial... The possibility and causes of flight accidents by operational error/deviation in takeoff are analyzed in this paper. The following three stages are each described individually: before liftoff, near liftoff and initial climb. Relations of accident/incident causal factors by operational error with intrinsical flight mechanics are discussed. 展开更多
关键词 flight safety TAKEOFF accident causes accident analysis
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A novel synthesis of fluvoxamine maleate
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作者 WANG Jian-lin HU Yu-lai 《Journal of Chemistry and Chemical Engineering》 2009年第8期32-37,43,共7页
Fluvoxamine maleate is an excellent antidepressive drug. In the literatures, it was synthesized by the use of 4-(trifluoromethyl) aniline or 4-(trifluoromethyl) benzonitrile as starting materials and 5-methoxy-4'... Fluvoxamine maleate is an excellent antidepressive drug. In the literatures, it was synthesized by the use of 4-(trifluoromethyl) aniline or 4-(trifluoromethyl) benzonitrile as starting materials and 5-methoxy-4'-(trifluoromethyl-phenyl) valerophenone as a key intermediate. However, the methods in literatures have some disadvantages, such as the use of expensive materials, heavy pollution of environment, long reaction time and low yield of the product (only 30-40% overall yield). We herein report an environmentally friendly synthetic method of fluvoxamine maleate, which used 4-(trifluoromethyl) benzoic acid and tetrahydrofuran as starting materials and FeCI3 as catalyst for the coupling of acid chloride with Grignard reagent. The fluvoxamine maleate was synthesized in 46% overall yield, through the oximation, etheration and salification of the intermediate successively.This method has some advantages, such as the use of commercially available materials, low cost, short production period (12-14 h), high yield and light pollution. 展开更多
关键词 4-(trifluoromethyl) benzoic acid TETRAHYDROFURAN SYNTHESIS fluvoxamine maleate
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Fast Fabrication and Judgement of Tip-Enhanced Raman Spectroscopy-Active Tips
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作者 Xian-Biao Zhang Yu-Fan Zhang +6 位作者 Hang Li Jie Cui Song Jiang Ben Yang Yang Zhang Yao Zhang Zhen-Chao Dong 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2022年第5期713-719,I0011,共8页
The quality of the scanning tip is crucial for tip-enhanced Raman spectroscopy(TERS)experiments towards large signal enhancement and high spatial resolution.In this work,we report a controllable fabrication method to ... The quality of the scanning tip is crucial for tip-enhanced Raman spectroscopy(TERS)experiments towards large signal enhancement and high spatial resolution.In this work,we report a controllable fabrication method to prepare TERS-active tips by modifying the tip apex at the atomic scale,and propose two important criteria to in-situ judge the tip’s TERS activity for tip-enhanced Raman measurements.One criterion is based on the downshift of the first image potential state to monitor the coupling between the far-field incident laser and near-field plasmon;the other is based on the appearance of the low-wavenumber Raman peaks associated with an atomistic protrusion at the tip apex to judge the coupling efficiency of emissions from the near field to the far field.This work provides an effective method to quickly fabricate and judge TERS-active tips before real TERS experiments on target molecules and other materials,which is believed to be instrumental for the development of TERS and other tip-enhanced spectroscopic techniques. 展开更多
关键词 Tip-enhanced Raman spectroscopy Tip-enhanced Raman spectroscopy-active tip Atomistic protrusion Image potential state
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One-way wave equation seismic prestack forward modeling with irregular surfaces 被引量:9
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作者 Xiong Xiaojun He Zhenhua Huang Deji 《Applied Geophysics》 SCIE CSCD 2006年第1期13-17,共5页
Mathematical geophone (MG) and equal-time stacking (ETS) principles are used to implement seismic prestack forward modeling with irregular surfaces using the oneway acoustic wave-equation. This method receives sei... Mathematical geophone (MG) and equal-time stacking (ETS) principles are used to implement seismic prestack forward modeling with irregular surfaces using the oneway acoustic wave-equation. This method receives seismic primary reflections from the subsurface using a set of virtual MGs. The receivers can be located anywhere on an irregular observing surface. Moreover, the ETS method utilizes the one-way acoustic wave equation to easily and quickly image and extrapolate seismic reflection data. The method is illustrated using high single-noise ratio common shot gathers computed by numerical forward modeling of two simple models, one with a flat surface and one with an irregular surface, and a complex normal fault model. A prestack depth migration method for irregular surface topography was used to reoroduce the normal fault model with high accuracy. 展开更多
关键词 mathematical geophone equal-time stacking principle seismic prestack forward modeling irregular surfaces and one-way wave-equation.
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Study on mechanical principle of reinforcing sidewalls and corners of roadway to control floor heave by anchors 被引量:3
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作者 王卫军 《Journal of Coal Science & Engineering(China)》 2003年第1期17-21,共5页
The movement principle of sidewalls and floor of extraction opening is analyzed, it is found that floor heave not only has something to do with the floor strata, but sidewalls. The effect of sidewall anchor and corner... The movement principle of sidewalls and floor of extraction opening is analyzed, it is found that floor heave not only has something to do with the floor strata, but sidewalls. The effect of sidewall anchor and corner anchor is studied, the mechanical principle of reinforcing sidewalls and corners is put forward and applied in engineering practice. 展开更多
关键词 sidewalls and corners anchor reinforcing floor heave control mechanical principle
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Origin of celiac disease:How old are predisposing haplotypes?
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作者 Giovanni Gasbarrini Olga Rickards +6 位作者 Cristina Martínez-Labarga Elsa Pacciani Filiberto Chilleri Lucrezia Laterza Giuseppe Marangi Franco Scaldaferri Antonio Gasbarrini 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第37期5300-5304,共5页
We recently presented the case of a first century AD young woman, found in the archaeological site of Cosa, showing clinical signs of malnutrition, such as short height, osteoporosis, dental enamel hypoplasia and crib... We recently presented the case of a first century AD young woman, found in the archaeological site of Cosa, showing clinical signs of malnutrition, such as short height, osteoporosis, dental enamel hypoplasia and cribra orbitalia, indirect sign of anemia, all strongly suggestive for celiac disease (CD). However, whether these findings were actually associated to CD was not shown based on genetic parameters. To investigate her human leukocyte antigen (HLA) class Ⅱ polymorphism, we extracted DNA from a bone sample and a tooth and genotyped HLA using three HLA-tagging single nucleotide polymorphisms for DQ8, DQ2.2 and DQ2.5, specifically associated to CD. She displayed HLA DQ 2.5, the haplotype associated to the highest risk of CD. This isthe first report showing the presence of a HLA haplotype compatible for CD in archaeological specimens. 展开更多
关键词 Celiac disease Human leukocyte antigen hap-Iotype Ancient DNA Single nucleotide polymorphisms MALABSORPTION
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柿广翅蜡蝉生物学特性及防治初报 被引量:12
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作者 刘永生 张清良 《亚热带植物科学》 2001年第2期39-41,共3页
柿广翅蜡蝉近十年来已成为湖北省主要果树害虫,寄主范围与为害程度有逐年扩大的趋势。成、若虫均吸汁为害多种果树;一年二代,以卵在寄主的枝条皮下越冬。在1~3龄若虫期用药剂防治,能有效控制柿广翅蜡蝉。
关键词 柿广翅蜡蝉 生物学特性 防治 果树害虫 形态特征
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