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damping off
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  猝倒病
     Adding 25% metalaxyl WP to ZSB-WC could prevent damping off an d white rust Nery significantly, and the control efficiency reached 90.6% and 75 .7% respectively. The coating technology also made the plot yield of water spina ch increase by 99.1% over CK.
     ZSB WC +2 5 %甲霜灵 (Metalaxyl)WP对蕹菜猝倒病和白锈病 (Albugo) 具极显著防治效果 ,防效分别达到 90 .6 %和75 .7% ,包衣处理蕹菜增产显著 ,小区产量比CK提高 99.1%。
短句来源
     Gas chromatographic analysis of fatty acid methyl esters (GC FAME),Biolog (computer aided numeric taxonomy method) and other tests were used for identification of 16 antagonistic bacteria against damping off of cucumber seedlings.
     通过甲基脂肪酸气相色谱分析法 (GC- FAME)、Biolog细菌鉴定法 (借助于计算机的数值分类法 )和其它试验对黄瓜苗期猝倒病具有明显防治效果的 16株拮抗菌株进行分类鉴定 .
短句来源
     DNA polymorphism of Pythium eight species of causing tomato seedlings damping off disease in Hangzhou region
     杭州地区番茄苗期猝倒病的8种腐霉的DNA多态性
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     The control effect of TV 1 applied for tobacco seedling damping off was as high as 86.5%.
     苗期防猝倒病与对照相比防效达 86 .5 % ;
短句来源
     The study result indicated that the pathogen of chinese prickly ash damping off was Fusarium solani (Mart.) App. et Wollenw.
     研究结果表明:花椒苗猝倒病病原为腐皮镰孢菌[Fusarium solani(Mart.) App.et Wollenw .] .该病菌的分生孢子萌发最适温度为30 ~35 ℃;
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  “damping off”译为未确定词的双语例句
     When sugarbeet seed soaking agent used, the results shown that the root yield increased 10.8% than CK, the sugar yield increased 14.2%, the sugar content increased 0.54 percentage points and it efficiently prevent and control the damping off and root rot diseases, it is the important measure to increase the sugarbeet yield and quality of direct sowing at present.
     应用甜菜浸种剂试验结果表明 ,甜菜根产量较对照提高10.8 %,产糖量提高14.2 %,含糖率提高0.54个百分点 ,且有效地防止和控制立枯病和根腐病的发生 ,是目前直播甜菜提高产、质量的一项重要措施
短句来源
     and better affect on rice seed quality and physiological effect for 1∶40 or 1.5∶40. and better affect on rice damping off.
     种衣剂1∶40,15∶40处理对水稻秧苗素质及生理效应的影响效果较好,对水稻立枯病防治效果较好。
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     The causal pathogens of rice damping off were mainly Rhizoctonia solani, secondly were Fusarium spp.
     试验表明水稻立枯病菌主要是由Rhizoctonia solani引起,其次是Fusarium spp。
短句来源
     It proved that T05-049 could inhibit R15 so as to control Cucumber seedling damping off.
     T05-049能够产生挥发性和非挥发性抗生物质来抑制R15的生长,其中起主要作用的是非挥发性抗生物质。
短句来源
     In controlling cotton damping off (caused by Rhizoctonia solani ), chitin additives completely eliminated the biocontrol activity of LTR 2 and Q1, but raised the control efficacy of LR from nil to 34.6%, while showing no significant effect on the biocontrol activity of GLR.
     几丁质添加物使 L TR- 2和 Q1防治棉花立枯病的效果完全丧失 ,但是能使 L R从没有防治效果提高到防治效果为 34.6% ,而对粉红粘帚霉菌的防治效果没有显著影响 ;
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  相似匹配句对
     NVESTIGATION ON DAMPING-OFF OF LIVESTOCK IN GUIZHOU
     贵州省家畜猝死症调查
短句来源
     EFFECT OF TACHIGAREN ON RICE DAMPING OFF
     土菌消防治水稻立枯病
短句来源
     OFF model.
     OFF动态模型对单分子光子源强度涨落进行了分析。
短句来源
     DAMPING ALLOYS
     减振合金
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     Damping Rubber
     阻尼橡胶
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为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  damping off
Leaves ofChenopodium ambrosioides exhibited strong fungitoxicity against the mycelial growth ofRhizoctonia solani causing damping off diseases of some seedlings.
      
This chemical at the recommended dose caused a drastic reduction in the pre- and post-emergence damping off caused byR.
      
Fluometuron at the highest concentration used was highly phytotoxic and increased the post-emergence damping off.
      
Trifluralin and dinitramine at the lower concentrations increased pre- and/or post-emergence damping off.
      
moniliforme) were investigated in vitro and mechanisms involved in the protection of damping off in P.
      
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Black rot of yam bean has been collected from the market in certain localities of Yunnan Province.The diseased tuber-root is characterized by the black dis- coloration of the interior tissues without conspicuous external symptoms.The evidence at hand indicates that the infection takes place before the digging time, through the dead main tap roots.It is unlikely that it works in the storage. Hundreds of isolations were made from the diseased tuber-roots and one fungus,a species of Pythium,predominated.The morphologic...

Black rot of yam bean has been collected from the market in certain localities of Yunnan Province.The diseased tuber-root is characterized by the black dis- coloration of the interior tissues without conspicuous external symptoms.The evidence at hand indicates that the infection takes place before the digging time, through the dead main tap roots.It is unlikely that it works in the storage. Hundreds of isolations were made from the diseased tuber-roots and one fungus,a species of Pythium,predominated.The morphologic and cultural char- acters of this causal fungus closely resemble those of Pythium spinosum,described by Sawada in 1927. Inoculations of yam bean seeds were made by sowing them in soils mixed with pure cultures of the causal fungus.It did not cause preemergence of in- fection several weeks after inoculation.Elongate black lesions were found on the basal stems.The fungus caused neither damping-off nor wilt of young seed- lings. Healthy tuber-roots of yam bean were selected and cleaned.After inserting hyphae and spores beneath the epidermis,they were laid in a moist chamber. Black discoloration of the interior tissues developed in the course of about three weeks.The discolored area enlarged but very slowly.The results of these ino- culation experiments indicate that Pythium spinosum Saw.is very weakly parasitic to yam beans. Occasionally,as might be expected,certain other species of fungi were isolated from the diseased tuber-roots.Among them were found two other species of Pythium,identified respectively as P.irregulare Buisman and P.intermedium de Bary.However,inoculations of tuber-roots of yam bean with these fungi failed to produce the characteristic symptoms. Besides from yam beans,a species of Pythium was isolated from the roots of broad bean(Vicia fabae L.).Despite certain minor morphologic differences,it has been identified as P.spinosum Sawada.However,no cross inoculation ex- periments have been conducted.

(1)在云南昆明的市场上,发现有内部组织变黑、但外表没有显明症状的地瓜块根。这个病害,称为地瓜黑心病。(2)地瓜黑心病的病原菌是一种折倒病菌,定名为 Pytlium spinosum Sawada.(3)这个折倒病菌,侵害地瓜的致病力很弱。它不能使地瓜的种子在未出土前枯死,幼苗折倒和蔫萎。它不能使幼株死亡,仅使块茎的内部组织变色。(4)病菌似乎在大田内经主权或茎端侵入块根,发展很慢,迄今还只在收获的块茎内发现这个病害。

The damping-off of the coniferous seedlings was a serious problem in the Northeast China.In nurseries of Larix olgensis,Pinus sylvestries var.mongolica,P.koraiensis,P.tabulaeformis,and P.densiflora suffered 25%,20%,20-30%,and 10% loss respectively during 1956 to 1961.Much higher disease incidence sometimes occurred in other nurseries.Five types of damping-off were recognized.These were pre-emergent rot,topple-overdamping-off,root-and hypocotylrot,top-killing or rot,and under crowding seeding and...

The damping-off of the coniferous seedlings was a serious problem in the Northeast China.In nurseries of Larix olgensis,Pinus sylvestries var.mongolica,P.koraiensis,P.tabulaeformis,and P.densiflora suffered 25%,20%,20-30%,and 10% loss respectively during 1956 to 1961.Much higher disease incidence sometimes occurred in other nurseries.Five types of damping-off were recognized.These were pre-emergent rot,topple-overdamping-off,root-and hypocotylrot,top-killing or rot,and under crowding seeding and dampconditions,the blight of one-or-two-year-old seedlings also occurred.Among these types,thetopple-over damping-off was more common and severe,but such kind of damping-off was ab-sent in the nurseries of P.koraiensis.During the period from 1956 to 1961,isolations were made from 7844 damping-off seed-lings of different nurseries from 22 localities and three causal organisms belonging to namelyRhizoctonia,Pythium,and Fusarium were obtained.Among them,Rhizoctonia spp.was themost prevalent.Under crowed conditions and with high air humidity,Rhizoctonia spp.alsoattacked the above ground parts of one or-two-year-old seedlings,causing the seedling blight.The degree of damage due to the damping-off in the nurseries was highly correlated withthe location of the nurseries and the cultural practices.The damage was usually muchgreater when the nurseries were situated at the lower ground with higher water table or atthe foot of hill-side.Great damage was also associated with high rate of seeding.It wasshown that those cultural practices which promoted the earlier emergence of the seedlingsreduced the disease infection.Thus a method was adopted in the nurseries by mixing theseeds with fine sands and snow together and keeping them in cellar during the winter,and afterthat soaking the treated seeds with water for several days before sowing in order to hastenthe germination.Thus a good stand of seedlings with little damage of seedling blight re-sulted.

松苗立枯病是东北地区针叶树育苗上的重要问题,其中以落叶松、樟子松、和红松等幼苗发病较重,油松和赤松等幼苗发病为轻。幼苗发病征状有土内腐死、猝倒、立枯、地上腐烂、和一、二年生大苗发生枯萎落叶等五个类型。诱致松苗发生侵染性立枯病的病菌,有 Rhizoctonia、Pythium 和 Fusarium等三种菌类,其中 Rhizoctonia 尤为主要。松苗立枯病发生的轻重与育苗措施有密切关系,地势低洼或位于山脚下坡的苗圃或苗床,一般发病较重。种子经雪藏混砂催芽处理后,能提早种子萌芽、出土和齐苗,有降低发病程度的作用。光照多少对幼苗发病有影响。根据苗圃的调查观察,全光育苗发病率低,遮蔭育苗发病率高;但在沈阳试验结果还不能证实这一点,相反的半遮蔭育苗要好些。

According to the results obtained in 1956 to 1961,the occurrence of damping-off in theconiferous nurseries generally first appears in the middle of May,prevails in the end of Mayto the middle of June,and stops in the beginning of July to the middle of August.In average,the duration of damping-off in nurseries continues about two months or even more,but theprevalent period lasts only twenty to thirty days.The dates of the first appearance and theperiods of duration,however,varied with different localities,years,and...

According to the results obtained in 1956 to 1961,the occurrence of damping-off in theconiferous nurseries generally first appears in the middle of May,prevails in the end of Mayto the middle of June,and stops in the beginning of July to the middle of August.In average,the duration of damping-off in nurseries continues about two months or even more,but theprevalent period lasts only twenty to thirty days.The dates of the first appearance and theperiods of duration,however,varied with different localities,years,and kinds of conifers.The soil temperature for disease development is over a range of 11 to 30° with an optimumat 18 to 25℃,but each causal organism tends to have a different optimum.Thus Rhizoctoniadamping-off usually occurs at 18 to 22℃,Pythium at 17 to 20℃,and Fusarium at 23 to 28℃.Therefore,Rhizoctonia and Pythium are secured in the early period of the growing season,lateron when the soil temperature goes up,the fusarial damping-off seedlings may be obtained.However,if the soil temperature is rather high in the early growing season,Fusarium mayalso be isolated from the diseased seedlings and when the conditions reverse,the percentageof diseased seedlings due to Fusarium infection goes down again.This condition is only truefor nurseries of Larix olgensis and Pinus sylvestries var.golica,while not true for nurseriesof P.koraiensis.From the results of four years' records and experiments,it is shown that high precipita-tion with high frequencies,or high soil water content during the susceptible stages of thegrowing period of coniferous seedlings,generally favors the development of damping-off in thenorth-east provinces.Although the soil temperature has certain effect on damping-off,but itis not critical for the disease development.In a certain locality,where the fluctuation of soil pH is inconspicuous during the growingseason,the correlation between the soil pH to the disease development is not significant.Besides the enviromental factors,the total percentage of disease incidence is also in-fluenced by the duration of the infecting period.

根据六年来的资料分析,在东北各地松苗立枯病发生的开始时期,一般多在5月中旬,北部则稍迟;流行盛期在5月下旬至6月上、中旬间,为期将近一个月;发病休止期约在7月初旬至8月中旬,差异比发病开始时期大。病害发生延续期约45—82天,平均发病期为61.4天。红松幼苗发病与流行盛期较晚,与樟子松和落叶松有所不同。三种立枯病菌病苗的出现时期受土壤温度的影响。丝核菌(Rhizoctonia)病苗发生最多在土温18—22℃,腐霉菌(Pythium)在17—22℃,镰刀菌(Fusarium)在23—28℃,所以一般早期发生的病苗主要为丝核菌侵染所致,其次为腐霉菌,在后期则多数为镰刀菌,但如早期土温较高时,亦有较多的镰刀菌病苗。总的发病土温范围是11—30℃,适温为18—25℃,红松幼苗的发病土壤适温还要高些。松苗立枯病在东北地区的流行主要受土壤含水量和降雨量的影响。松苗在生长感染期间,如遇雨量大和次数多或土壤含水量高时,则有利于发病,几天后在流行曲线上即可出现发病率的高峯。土壤温度不是病害流行的主要限制因素,因为在幼苗生长期间,土温范围都适宜于立枯病的发生。在同一地区的发病期间,苗床土壤 pH 值的变动并不显著,故在同一地区病...

根据六年来的资料分析,在东北各地松苗立枯病发生的开始时期,一般多在5月中旬,北部则稍迟;流行盛期在5月下旬至6月上、中旬间,为期将近一个月;发病休止期约在7月初旬至8月中旬,差异比发病开始时期大。病害发生延续期约45—82天,平均发病期为61.4天。红松幼苗发病与流行盛期较晚,与樟子松和落叶松有所不同。三种立枯病菌病苗的出现时期受土壤温度的影响。丝核菌(Rhizoctonia)病苗发生最多在土温18—22℃,腐霉菌(Pythium)在17—22℃,镰刀菌(Fusarium)在23—28℃,所以一般早期发生的病苗主要为丝核菌侵染所致,其次为腐霉菌,在后期则多数为镰刀菌,但如早期土温较高时,亦有较多的镰刀菌病苗。总的发病土温范围是11—30℃,适温为18—25℃,红松幼苗的发病土壤适温还要高些。松苗立枯病在东北地区的流行主要受土壤含水量和降雨量的影响。松苗在生长感染期间,如遇雨量大和次数多或土壤含水量高时,则有利于发病,几天后在流行曲线上即可出现发病率的高峯。土壤温度不是病害流行的主要限制因素,因为在幼苗生长期间,土温范围都适宜于立枯病的发生。在同一地区的发病期间,苗床土壤 pH 值的变动并不显著,故在同一地区病害流行与 pH 值关系亦不大。当年病害发生总百分率的高低,除受气候因素的影响外,还受病害发生延续期长短的影响。如发病延续期久,则总的发病率较高。

 
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