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canker
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  溃疡病
    FURTHER REPORT OF STUDY ON POPLAR CANKER CAUSED BY DOTHICHZA POPULEA
    杨树疡壳孢溃疡病的研究续报
短句来源
    STUDY ON BLEEDING CANKER OF KOREAN PINE
    红松流脂溃疡病的研究
短句来源
    STUDY ON THE CORYNEUM SWOLLEN STEM CANKER OF POPLARS
    杨树肿茎溃疡病的研究
短句来源
    TRIAL CHEMICAL CONTROL OF CORYNEUM SWOLLEN STEM CANKER OF POPLARS
    杨树肿茎溃疡病化学防治试验
短句来源
    STUDY ON THE CONTROL OF POPLAR CANKER DISEASE CAUSED BY DOTHIORELLA GREG ARIA
    杨树溃疡病防治技术的研究
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  溃疡
    Study on antagonistic strain Bv10 of Bacillus subtilis against citrus canker
    柑橘溃疡病菌的拮抗细菌Bv10的研究
短句来源
    Isolation and identification of southern stem canker of soybean
    大豆南方茎溃疡病菌的分离与鉴定
短句来源
    RT-PCR Detection of Pear Blister Canker Viroid in Kuerla Pear
    利用RT-PCR检测库尔勒香梨泡状溃疡类病毒
短句来源
    The bacterial swollen stem canker of poplars is prevalent on large scale in man-made poplar forest of Northeastern of China.
    杨树细菌肿茎溃疡病在中国东北地区杨树人工林大面积发生,引起幼林和成林的树干和枝坏死、腐烂、溃疡、肿茎、木质变色,造成严重损失。
短句来源
    Studies on the Biological Characteristics of Citrus Baterial Canker Disease and the Control Efficiencies of Fungicides against the Pathogen
    柑桔溃疡病菌的生物学特性及杀菌剂的药效研究
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  “canker”译为未确定词的双语例句
    A STUDY ON POPLAR CANKER VALSA SORDIDA NAT
    杨树烂皮病[Valsa sordida Nat.]的研究
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    STUDIES NO THE INFECTION PERIOD OF Valsa Mali Miyabe et Yamada,THE CAUSAI AGENT OF APPLE TREE CANKER
    苹果树腐烂病(Valsa malimiyabe et Yamada)侵染时期研究
短句来源
    CONTROL OF APPLE TREE CANKER (VALSA MALI) WITH“11371” FERMENT LIQUID
    “11371”发酵液防治苹果树腐烂病的试验
短句来源
    STUDY ON BIOCONTROL FOR CYTOSPORA CANKER OF POPLAR
    杨树烂皮病生物防治的研究
短句来源
    EFFECT OF AGRICULTURAL ANTIBIOTIC 120 AGAINST APPLE TREE CANKER, VALSA MALI
    农抗120对苹果树腐烂病菌的作用研究
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  canker
The affected cane cuttings and cankers occurring on affected canes were found to contain Coniothyrium fuckelii (the causal fungus of rose stem canker) and sclerotia of Botrytis cinerea (the causal fungus of gray rot).
      
We have chosen to investigate water stress and Citrus Canker, which is a disease caused by the Xanthomonas axonopodis pv.
      
The Citrus Canker's contaminated leaves were discriminated from the healthy leaves using a more complex analysis of the fluorescence spectra.
      
Different clones, resistant and susceptible to cypress canker, have been analyzed; some differences between these two classes of trees have been found in their biflavonoid content.
      
The ascomcete Ceratocystis fimbriata, the causal agent of "canker stain disease," secretes a protein of 12.4 kDa that elicits phytoalexin synthesis and plant cell death.
      
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Anatomical studeis of the epidermal structures of the various organs at different developmental stages of different citrus species indicate that the density and maturity of the natural pores are intimately related with the amount of infection by the canker organism, Xanthomonas citri. Leaf and stem infections have been found to be heaviest during the stage of shoot elongation when large number of new stomates and lenticels are in the process of formation. No infection occurs at the top of new shoots where...

Anatomical studeis of the epidermal structures of the various organs at different developmental stages of different citrus species indicate that the density and maturity of the natural pores are intimately related with the amount of infection by the canker organism, Xanthomonas citri. Leaf and stem infections have been found to be heaviest during the stage of shoot elongation when large number of new stomates and lenticels are in the process of formation. No infection occurs at the top of new shoots where the natural pores have not yet been formed. Old shoots with mature pores also cease to be susceptible to infection. Fruits are exposed to infection longer than the shoots. They are most susceptible from the end of May to the middle of June when stomatal development is most active. Few infections take place after 60 days of the fruit growth. Susceptibility is correlated with the density and size of stomates of various organs of different species in the following descending order: Citrus senensis, C. aurantium, C. lirnon and Poncirus trijolia.

利用柑桔不同品种的同样器官或同一品种同一株上不同部位以及不同发育时期的器官,作表皮組織結构的比較观察,証明气孔的形成及发育状态与柑桔潰瘍病的自然侵染(即非伤損侵染)有密切的关系。当柑桔枝梢生长到伸长停止期,枝叶上的表皮气孔的形成量为最大,此时达到最大的侵染,当枝梢停止生长后,枝叶表皮組織不再形成新气孔,原有气孔已漸老熟,此时便进入侵染的末期。徒长性枝梢的生长期較长,延迟了伸长的停止期,頂端不断形成新組織,而下部的組織已形成气孔,因此枝梢下部生长較久的茎叶先得病,而其頂部組織不受侵。果实的生长期甚长。在5月底至6月間果实的增长最快,形成气孔最多,故不断受侵染。当幼果生长60天左右,果实趋于定形,原有气孔已老熟,从此便絕少侵染。在器官上大量气孔形成时期如遇天旱,侵染便因病原菌的限制而減低或避免;如遇多雨时,侵染期可以延长。气孔分布最密的組織或器官最易侵染。品种間的抗病性亦与此有关,例如各器官的表皮气孔密度及气孔中隙的尺度均以甜橙为最高,順次为酸橙、檸檬及枳壳等。不产生气孔的表皮組織例如叶片的上表面不易受侵。伤損及人工接种可以使任何气孔形成时期受侵,說明突破表皮时便失去抗病力。但在自然情况下虫伤及其他損伤极易栓化,...

利用柑桔不同品种的同样器官或同一品种同一株上不同部位以及不同发育时期的器官,作表皮組織結构的比較观察,証明气孔的形成及发育状态与柑桔潰瘍病的自然侵染(即非伤損侵染)有密切的关系。当柑桔枝梢生长到伸长停止期,枝叶上的表皮气孔的形成量为最大,此时达到最大的侵染,当枝梢停止生长后,枝叶表皮組織不再形成新气孔,原有气孔已漸老熟,此时便进入侵染的末期。徒长性枝梢的生长期較长,延迟了伸长的停止期,頂端不断形成新組織,而下部的組織已形成气孔,因此枝梢下部生长較久的茎叶先得病,而其頂部組織不受侵。果实的生长期甚长。在5月底至6月間果实的增长最快,形成气孔最多,故不断受侵染。当幼果生长60天左右,果实趋于定形,原有气孔已老熟,从此便絕少侵染。在器官上大量气孔形成时期如遇天旱,侵染便因病原菌的限制而減低或避免;如遇多雨时,侵染期可以延长。气孔分布最密的組織或器官最易侵染。品种間的抗病性亦与此有关,例如各器官的表皮气孔密度及气孔中隙的尺度均以甜橙为最高,順次为酸橙、檸檬及枳壳等。不产生气孔的表皮組織例如叶片的上表面不易受侵。伤損及人工接种可以使任何气孔形成时期受侵,說明突破表皮时便失去抗病力。但在自然情况下虫伤及其他損伤极易栓化,故影响不大。

Colletotrivhum camelliae Massee occurred severely on Camellia Oleosa as well as on Theasinensis L.over a vast area in the South of Yangtze river.It caused a total loss of about60% premature dropping of the fruits.The pathogen most probably over-wintered withmycelia in the infected cankers on the branches or in the diseased bud-end.Symptoms onfruits were dark-brown lesions with dots of scarlet conidia masses arranged in concentric ringsunder moist condition.Conidia measured 12-24×4.5-6μ on PDA and 12-28.5×4.5-6μ...

Colletotrivhum camelliae Massee occurred severely on Camellia Oleosa as well as on Theasinensis L.over a vast area in the South of Yangtze river.It caused a total loss of about60% premature dropping of the fruits.The pathogen most probably over-wintered withmycelia in the infected cankers on the branches or in the diseased bud-end.Symptoms onfruits were dark-brown lesions with dots of scarlet conidia masses arranged in concentric ringsunder moist condition.Conidia measured 12-24×4.5-6μ on PDA and 12-28.5×4.5-6μ onsynthetic media.Setae were prominent either on media or on plant tissues,measured 15.3-108.6×3.6-5.4μ.Conidia germinated after 15 days in low temperatures or under dry condi-tions.They were spread by splashes of rain from July to October.The incubation periodof the disease varied with temperature,usually 5-10 days in summer.The varietal differencein disease resistance was notable.It seemed that the structure of the epidermal cells andthe constituents of the cells of fruits were to some extent related to the disease resistance.

油茶炭疽病引起落花、落蕾、落果及落叶。病落果率约为全年总落果率的60%,根据标准株平均统计,病落蕾率占总落蕾率的26—45%。通过菌种形态比较与接种试验,肯定病原与茶叶上云纹叶枯病菌系同一种为 Colletotrichum camelliae Massee。其无性世代发生在寄主各部位,呈现不同征状,有性世代仅出现在连续阴雨一个月以上的枝梢及花蕾的病斑上。分生孢子具有抗旱及抗低温能力,但不能忍受冰冻温度。初次侵染来源为枝干的溃疡斑及病蕾蕾痕,经春雨浸湿大量产生,通过雨中风力广泛传布。干燥气流在传病上不起作用。夏、秋晨间露水滴溅也可使病菌孢子扩散侵染。根据湘西怀化县长期观察试验,象鼻虫在传病上并不是重要因素。各地区温差影响发病迟早,湿差影响严重度,雨天日数决定落蕾、落果的数量与时期。品种抗病性差异除形态特征外(气孔数量、角质层厚薄等),可能与表皮细胞层次与缀密度以及细胞的内含成份有关,果形及色泽与抗病性差异无实质关系。小果型品种(湖南珍珠于、苦槠子,江西宜春中子)的抗病性可能由上述的特性决定。

Tree cankers are defined as localized rigions of necrosis in the bark of stems or branchs. The infectious diseases are mainly caused by facultative fungi, occassionally by bacteria, and usually found in conifers and hard woods. Damages from small depressions in the outer bark to a rapid girdding of the branchs and stems with high mortality occur consequently. On the basis of authors' recent investigations the symtoms, pathogens, paths and seasons of infection, host resistance, environmental conditions...

Tree cankers are defined as localized rigions of necrosis in the bark of stems or branchs. The infectious diseases are mainly caused by facultative fungi, occassionally by bacteria, and usually found in conifers and hard woods. Damages from small depressions in the outer bark to a rapid girdding of the branchs and stems with high mortality occur consequently. On the basis of authors' recent investigations the symtoms, pathogens, paths and seasons of infection, host resistance, environmental conditions affecting disease development and control of the tree cankers were generally discussed. The symptom of the tree cankers developed usually in the early spring when host plants were weakened by adverse enviromantal factors such as drought, frost, unfavorable soil conditions, mismanagement,insect damage etc. Intensively silviculture managements can promote the growth vigor of trees that is commonly known as an economic and effective measure to prevent the infection of tree cankers. In the cases of trees infected with various initial lesions, treatments with fungicides are advisable.

树木溃疡病是指枝干皮层局部坏死的病害,在针阔叶树上常有发生,为害严重的常环切枝干,引起树木死亡。侵染性树木溃疡病主要由兼性寄生真菌侵染所致,也有个别是由细菌引起的。本文根据作者多年的观察和部分文献对树木溃疡病的症状、病原、侵入途径、侵染时期、侵染发生的条件,寄主的抗病性和防治方法作了一般性的讨论。树木通常只有在栽培不当或受不良环境条件的影响而致生长削弱时,才会发病。病害防治首重分析发病的诱因,采取合理的造林技术措施,消除各种削弱树木活力的因素。在有条件的地方可以考虑化学防治。

 
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