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蚜虫传播
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  aphid transmission
     It was estimated that there could be some mistakes in the determination of PI sequence of G2 and G7. The phylogenetic analysis of amino acid sequences of PI showed that SMV-HZ was most closely related to SMV-Y5. Our study also showed that there was a transmembrane structure in P3, which played an important role in the aphid transmission probably.
     依据P1蛋白氨基酸序列的相似性,对相关病毒分离物也作了系统进化树分析,从分析结果来看,SMV-HZ与SMV-Y5株系的亲缘性最高。 对P3蛋白的研究表明该蛋白内存在一个跨膜结构,可能与蚜虫传播有关。
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  transmission by aphids
     Specificity of Three Nonpersistent Virus Transmission by Aphids
     三种非持久性病毒蚜虫传播专化性研究
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  “蚜虫传播”译为未确定词的双语例句
     The thermal inactivation point was 60~65℃, dilution end point 10~(-3)~10~(-4), and the survival period in vitro 3~5 days at 18-20℃.
     其纯化温度为60~65℃,稀释限点为10~(-3)~10~(-4),体外存活期为3~5天; 该病毒不能由蚜虫传播;
短句来源
     CTV is spreaded mainly through grafting and aphid in the field, and Toxoptera citridus, which is dominant, is the best efficient transmitting vector.
     CTV在田间主要通过嫁接和蚜虫传播,其中优势种群橘蚜是CTV的最有效传播介体。
短句来源
     The transmitting efficiency and aphids number are in a coincidence. In this research, one aphid transmitting efficiency is 8% wihile 30 aphids' can get to 75%.
     本试验证明,单头蚜虫传播效率为8%,30头蚜虫传播效率可以达到75%。
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     Seeds collected from the infected plants carrythe virus.
     传毒试验证明经汁液和蚜虫传播,种子带毒。
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     HC-pro gene, which is encoded by the SCMV genome, is a protein related with aphid-transmission, otherwise it takes part in many other bio-chemistry procession.
     甘蔗花叶病毒基因编码的HC-pro是和蚜虫传播相关的一个蛋白因子,并且和病毒自身的许多生命活动相关。
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  相似匹配句对
     Studies on Aphis Transmitting TEV
     蚜虫传播烟草蚀纹病毒的研究
短句来源
     BIOLOGICAL CONTROL OF APHIDS
     蚜虫的生物防治
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     STUDIES ON THE NON APHID - TRANSMISSIBLE BEAN STRAIN OF CUCUMBER MOSAIC VIRUS
     非蚜虫传播的黄瓜花叶病毒菜豆株系
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     Wave propagation
     波的传播
短句来源
     ELECTROMAGNETIC WAVES PROPAGATED ALONG HELICAL WIRES
     电磁波在螺旋线上的传播
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  aphid transmission
The effect of pre-acquisition starvation on aphid transmission of potyviruses during observed and electrically recorded stylet p
      
All 11 plant lines were challenged with BYMV using controlled aphid transmission.
      
One month following aphid transmission, the transgenic plants were examined by immunoelectron microscopy for presence of the virus.
      
When the seed lots were indexed by aphid transmission of the virus toPhysalis floridana Rydb.
      
Pepper mottle virus, genus Potyvirus, was first identified in Japan based on particle morphology, host range, aphid transmission, and molecular classification using the nucleotide sequence of the coat protein gene and 3″-untranslated region.
      
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  transmission by aphids
Polymer webs to prevent virus transmission by aphids in seed potatoes
      
The effect of mineral oil on stylet activities and potato virus Y transmission by aphids
      
Endosymbiotic bacteria play an essential role in the performance of aphids, and in luteovirus transmission by aphids.
      
Transmission by aphids of potato spindle tuber viroid encapsidated by potato leafroll luteovirus particles
      


In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf...

In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf sheath and spike,particularly the bristle,while that onthe "green-stem" varieties was the yellowing of the leaf blade.In all instances,thediscoloration was usually accompanied by shortening of internode,stunting of thewhole plant.wrinkling of leaf surface,slight waviness of leaf margin,deformationof spike and underdevelopment of root systems.Plants infected at an early stagewere severely stunted and on heads were produced. It has been demonstrated that the red-leaf disease of the foxtail millet was causedby a virus readily transmitted by at least three different species of grain-infestingaphids:corn aphid,Rhopalostiphum maidis Fitch;grain aphid,Macrosiphum granari-um Kirby;and green-bug,Toxoptera graminum Rond.Tests with non-viruliferouscorn aphid eliminated the possibility of direct aphid injury as the cause of the disease. ??The virus was not transmissible by mechanical inoculation,by seeds nor through thesoil. Studies on the mode of transmission of red-leaf virus by corn aphid indicatedthat the virus was persistent in its insect vector and could infect in succession aseries of at least 27 tested millet seedlings.The aphid was unable to acquire thevirus in a 5-minute feedling period on the virus source but was able to pick up thevirus in 10-minute period.The 8-hour acquisition feeding period was optimum forthis aphid.The testing feeding period was found to be not more than 5 minutesand a 4-hour period of confinement on the diseased plant was ample for the aphidto cause maximum infection.Attempts to transmit the virus with cotton aphid.Aphisgossypii Gloner peach aphid,Aphis persicae Sehult and soybean aphid,Aphis glycinesMats,have given negative results.The incubation period for symptoms of the red-leaf virus in foxtail millet ranged from 10 to 32 days with the model period beingbetween 14 to 20 days. Under natural conditions,certain cultivated cereals and grass weeds showed thesymptoms resembling the red-leaf disease of foxtail millet.Among them,were ZeaMays L.,Panicum miliaceum L.,Setaria lutescens (Weigel) Hubb.,S.viridis (L.)Beauv.,Digitaria sanguinalis (L.) Scop.Echinochloa crusgalli (L.) Roem.,Eragrostiscilianensis (All.) Link,E.pilosa (L.) Beauv.,Arundinella anomala Steud,Spodiopogonsibiricus (Steud.) Trin.,Bothruochloa ischaemum (L.) Keng.,Capillipedium parviflor-um (R.Br.) Stapf and Poa practensis L..Artificial inoculation with the corn aphidproved that the first six named plant species,including the two cereals,were susce-ptible to the red-leaf virus and they produced,in all cases,the typical symptoms.Tests with the rest sexen grass weeds are in progress. The results of disease control experiments by timely spraying with an insecticide,E605,under field conditions were inconsistent.Among the 349 foxtail millet varie-ties of foxtail millet examined in the experimental field,nine of them were foundto be highly torelant to and suffered only very slightly from the attack of the red-leaf virus.These varieties were,however,succeptible in aphid transmission experiments. Available evidences point to the conclusion that the red-leaf virus of the foxtail millet herin reported is quite different from all the previously described cereal viruses.Among the cereal virus that closely resembles the red-leaf virus is the yellow-dwarfvirus reported by Oswald tnd Hauston.These two viruses are similar in the follow-ing respects:both are transmissible by the same species of aphids (Rhopalosiphummaidis,Microsiphum graminium andToxoptera granarium) and neither virus can betransferred mechanically.But they differ strikingly from each other in their hostranges.According to Oswald and Hauston,there were 19 of 55 grasses tested thatappeared to be immune from the yellow-dwarf virus.Digitaria sanguinalis,Echino-chloa crus-galli Setaria viridis and Zea Mays were among the immune hosts.On thecontary,all these four gramineous plants were found to be extremely susceptible tothe red-leaf virus both under natural condition and in artificial inoculation experi-ments.Accordingly,the red-leaf,a persistent aphid borne virus affecting the foxtailmillet,is herein reported as a new virus of the cereals.

小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、六月禾和大油...

小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、六月禾和大油芒均感染小米紅叶病病毒。其它紅化杂草和接种試驗,正在进行中。紅叶病病毒对小米植株所产生的影响,因植株發育的阶段不同而輕重有所差异,植株感病愈早病害愈剧烈。用杀虫剂E605在田間噴射小米防治紅叶病,未能表現药剂有防病的效能,在田間观察349个品种,选得9个高度耐病和农艺性状优良的品种。抗病选种可能是当前防治小米紅叶病最有效的防治措施。根据病原的傳染方法,寄主范围和所表現的症状,小米紅叶病病毒和以往所报道的禾本科植物的病毒病害的病毒均不相同,因此它是禾谷类作物的一个新的病毒。

A virus isolate was obtained from the severely infected mosaic plants of asparagus lettuce (Lactuca sativa L.var.asparagus L.) in the suberb of Taian city.The infected plants were characterized with systematic mosaic,necrotic brown spots and some malformations and shrinkage of young leaves.10 species in 6 families of plant were tested,in which 4 species were infected.These are Chenopodium quinoa,Chenopodium amaranticolor and Gomphrena globosa. The virus is transmissible by mechanical inoculation with sap or...

A virus isolate was obtained from the severely infected mosaic plants of asparagus lettuce (Lactuca sativa L.var.asparagus L.) in the suberb of Taian city.The infected plants were characterized with systematic mosaic,necrotic brown spots and some malformations and shrinkage of young leaves.10 species in 6 families of plant were tested,in which 4 species were infected.These are Chenopodium quinoa,Chenopodium amaranticolor and Gomphrena globosa. The virus is transmissible by mechanical inoculation with sap or byaphid (Myzus persicae).Seeds collected from the infected plants carrythe virus.The dilution end point of the virus is 5×10~(-1)~5×10~(-2) and thethermal inactivation point 55~60℃.The infectivity is retained at roomtemperature for 24 hours.A partially purified preparation of the viruswas obtained by homogenizing the infected leaves with borate,clarifyingwith organic solvents and precipitating by PEG and differential centri-fugation The virus particles are flexuous rods,675~775 nm in length nd 10~15 nm in diameter.The electron microscopy of the section of the infected leaf shows the typical pinwheel inclusion bodies in cytoplasm characteristic of the potyvirus group. It is suggested that the virus isolated from asparagus lettuce is anasparagus lettuce strain of lettuce mosaic virus.

由山东济南和泰安两市郊区大面积受害的莴苣(Lactuca sativa L.var.asparagina L.)上分离到一株病毒。莴苣上症状为系统花叶,畸型和褐色斑点。人工接种,在昆诺阿藜和苋色藜上产生局部枯斑和系统症状,千日红上呈不规则斑块,不侵染普通烟、心叶烟、曼陀罗、豇豆、菜豆和黄瓜。传毒试验证明经汁液和蚜虫传播,种子带毒。病毒稀释限点5×10~(-1)~5×10~(-2);失活温度55~60℃;体外保毒期(22~23℃)24小时,经有机溶剂澄清,聚乙二醇沉淀和差速离心可部分提纯。病毒粒子线状,长约750毫微米;病组织超薄切片可见风轮状内含体。试管沉淀法初步测定与马铃薯Y病毒血清呈阳性反应。根据上述病状,寄主反应,物理特性,传播方式,病毒颗粒和内含体形态特征,莴苣分离物属于马铃薯Y病毒组的成员,为莴苣(包心)花叶病毒的一个毒株,故称山东莴苣花叶病毒。

After detection of virus in truck crops and other plants in the su-burbs of Shanghai with specific antiserum against Turnip Mosaic Virus,

在上海市郊,由于蔬菜病毒病的危害,而使蔬菜生产受到较大的损失,引起有关部门的关注。经研究,马铃薯Y病毒群的芜菁花叶病毒(Turnip Mo-saic Virus TuMV)是严重危害上海市郊县蔬菜的一个病毒。在制备了T-uWV专一性抗血清的基础上,对上海市郊生产蔬菜起主要作用的上海县、嘉定县、宝山县、川沙县定期一年(1980年9月~1981年9月),应用Tu-MV抗血清,测定TuMV在蔬菜等植物上的寄主范围,从而了解TuMV在上海市郊县蔬菜等植物上的感染情况,为从郊县生态区域出发,防治TuMV对蔬菜的危害,提供有益的资料;另外,由于TuMV主要是蚜虫传播的,因此,调查TuKV一年在蔬菜等植物上的分布概况,便于查清TuMV的越冬寄主范围。同时,对于TuMV(崇明大白菜分离株)寄主范围的研究,也具有学术上的价值。

 
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