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fusarium spp
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  镰刀菌
     , Fusarium spp.
     、镰刀菌(Fusarium spp.)
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     ,Fusarium spp.
     、镰刀菌(Fusarium spp.)
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     Inhibition activity of the metabolite of marine mold 1-B6-10 to Fusarium spp.
     海洋霉菌1-B6-10代谢产物对几种镰刀菌的抑制作用
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     The results of sequences analysis show that Fusarium solani and Fusarium spp.
     经序列比对,结果显示腐皮镰刀菌和分离的镰刀菌均与尖镰刀菌的一个专化型Fusarium oxysporum f.
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     Randomly amplified polymorphic DNA (RAPD) markers were used to evaluate the genetic diversity among 39 isolates of Fusarium spp.
     选用15个随机引物,利用RAPD技术,对39个镰刀菌菌株的基因组DNA进行种群分析,评估RAPD分析区分不同种类镰刀菌的可行性。
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  “fusarium spp”译为未确定词的双语例句
     ,Fusarium spp.
     ,Fusarium spp.
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     , Fusarium spp.
     、镰孢属(Fusarium spp.)
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     j Fusarium spp.
     Fusarium SPP.
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     polysporum, Gliocldium catenulatum, Coniothyrium minitans, Fusarium spp.
     polysporum、Gliocladium catenulatum、Coaiothyrium minitans、Fusarium spp.
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     Mechanism of Rhizobacteria BH_1 (Bacillus sp.) to Suppress Soybean Root Rot Disease Caused by Fusarium spp.
     芽孢杆菌BH_1防治大豆根腐病的效果及机制
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  相似匹配句对
     , Fusarium spp.
     、镰刀菌[Fusariumspp.]
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     ,Fusarium spp.
     、镰刀菌(Fusarium spp.)
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     spp.
     spp.
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     spp;
     spp;
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     and Fusarium oxporum.
     和Fusarium oxporum引起的黄瓜立枯病和枯萎病。
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  fusarium spp
We isolated several strains of Rhizopus and Fusarium spp.
      
The successive qualitative microbial changes during the decomposition of bajra stalk in a sandy sierozem soil were studied.Alternaria spp.,Aspergillus spp.,Cladosporium spp.,Fusarium spp.Gliocladium spp.,Mucor spp.
      
Fusarium spp., associated with symptomatic and asymptomatic plants, may be a primary causal agent of disease, a secondary invader or an endophyte.
      
Six further strains, again all Fusarium spp., hydrated geranylacetone at the inner double bond.
      
Rhizosphere populations of the soilborne pathogensPythium spp.,Fusarium spp.
      
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Sweet-potato wilt,a dangerous disease of sweet potatoes,has made itsappearance for more than 10 years in several districts of the south-easternKwangsi and south-western Kwangtung.During recent years it has been found tocause a heavy loss of sweet potato crop in these two provinces. Sweet-potato wilt is a kind of wilt disease which infects the fibrovascular ??bundles of the plant.It begins to infect the vine cuttings and those parts thatare in close contact with the sick-soil.The infected parts first show the...

Sweet-potato wilt,a dangerous disease of sweet potatoes,has made itsappearance for more than 10 years in several districts of the south-easternKwangsi and south-western Kwangtung.During recent years it has been found tocause a heavy loss of sweet potato crop in these two provinces. Sweet-potato wilt is a kind of wilt disease which infects the fibrovascular ??bundles of the plant.It begins to infect the vine cuttings and those parts thatare in close contact with the sick-soil.The infected parts first show the water-soaked appearance and then extend upwardly,and eventually become blackenedand rotted.As a rule,ths leaves of the infected plants show an abnormal coloror pale yellow,and drooping appearance.In the meantime,the root tips of theadventitious roots of the vines lose their cortex and begin to lot.Wilting followsquite rapidly and finally the entire plant dies.If the disease infects the plantafter the potatoes beginning to form,it may extend throughout the vine and in-to the roots,causing the enlarged roots to show brown streaks and finally blackenedand rotted with pungent odor. The cause of the disease may appropriately be considered as due to bacteriaand Fusarium spp.Four types of bacteria,i.e.white smooth type,yellow smoothtype,white rough type and yellow rough type,are able to cause the disease.Atleast four kinds of Fusarium,i.e.white aerial mycelium type,white mycelium withred of a purple tint substratum type,pink mycelium with red of a purple tint sub-stratum type and without aerial mycelium type are responsible for the disease.Which is the main cause of the disease? Either bacteria or Fusarium alone or theboth in combination is able to cause the disease,further tests should be madebefore a definite conclusion may be drawn. The dissemination of the wilt organisms may appropriately be considered inthree ways,namely,(1) by infested roots and vines,(2) by sick-soil,and (3) byinsects,as the sweet-potato weevil (Gycas formicarius Fabr.).The former twoways of dissemination are more definite than the latter,however,further testsand observations should be made. According to the results of 2-years field experiments in Tsen-shi and Peh-liustations,it shows that different varieties of sweet-potato possess different resis-tance to the disease.Among several varieties tested,it is found that Tai-nung No.3being a promising one,because it yields very high and is highly resistant to thedisease and to the drought.Although it is occasionally found to be susceptibleto the disease in the experiment field of Tsen-shi and is more commonly foundin the experiment field of Lin-kwei.The second variety is Tai-nung No.46 dueto its high degree of disease resistance. The results of preliminary tests indicate that the method of reproduction byold vines would decrease both in disease resistance and in yield within the samevariety. From tests conducted in two different fields,i.e.one at dry land and the ??other in the rice field,it shows that the discrepancies were found in the occur-rence of the disease and also in the relation of the method of manuring to thepercent of infection. Dipping cuttings in different disinfectants did not show any significant results.There are discrepancies in both plowed and sunned field test and two methodsof setting the vines test.These may be due to methods of treatment,landand varieties used for experiment being different. According to the results of date of planting tests in Peh-liu,it indicates thatthe occurrence and the development of the disease are closely related to the highhumidity and the high temperature.These climatic factors affect the health ofthe early growth of the plant which in turn would increase the disease resistance.It is suggested that the most suitable date for planting sweet-potato in Peh-liu isin the first decade of August. In comparing the weather records of the three districts—Lin-kwei,Peh-liu andTsen-shi—in relation to the date of early and last occurrences of the disease,itshows that an average air temperature of 23.4-28.4℃ is most suitable for the oc-currence of the disease,and an average relative humidity of 80 per cent is alsoneeded for the infection of the disease.Based on these facts,we may say thatsweet-potatoes in Lin-kwei are capable to be easily infected by the wilt organisms.except the last date of the infection would be preceded 10-20 clays.Any otherregions with similar climatic factors,it is also very possible to be infected. According to the results of 2-years experiments and facts from surveys,sug-gestive control measures are proposed: (1) excluding the disease by regulationthrough the use of quarantines enforced by an inspection station empowered torestrict or eradicate diseased roots and vines to prevent them from becomingsources of infection in disease-free districts; (2) selection of disease resistant varie-ties in combination with cultural practices such as the use of more ash,suitableamount of lime and manure,and suitable date of planting to enable plants toescape or resist the disease.For the present time,we suggest that the use of Tai-nung No.3 in Tsen-shi and Peh-liu may meet the requirement,and promotingthe method of root reproduction in place of an old method of reproduction byrepeating vine cuttings from old vines can prevent the degeneration of the plantand decrease the infection of the disease.

甘薯瘟是一种具有十余年历史的病害,不仅严重地威胁着广西东南部几县的甘薯生产,同时也严重影响了广东西南部和广西毗鄰的几个县的甘薯生产。甘薯瘟是一种枯萎类型的病害,是侵染維管束的脉管病害,首先侵染插条与土壤接触部位,先呈水漬狀,继而变黑腐爛并向上發展,叶色不正常或呈黄色而萎垂。此时薯藤的不定根根尖脫皮并开始腐爛,最后全株枯死。如在結薯块后才受病,除薯藤显现枯萎現象外,可向薯塊發展而呈褐色条斑,最后变黑腐烂,發出刺鼻臭辣气味。瘟薯的病原初步認为是由细菌和镰刀菌所致。细菌中可分为白色粘滑型,黄色粘滑型,白色干绉型和黄色干绉型;鐮刀菌中包括白色气生菌丝型,白色菌丝基層稍呈紫紅色型,粉紅色菌丝基層呈紫紅色型,无气生菌丝型等。但究以哪类为主导,抑系并發性呢?仍須进一步研究。薯瘟病原的傳播,初步認为有三种方式:带病薯块和薯苗,病土,及昆虫(如小象鼻虫等),其中以前二种較为肯定,后一种則仅属可能,仍有待+于进一步試驗观察。甘薯各品种間确具有不同的抗病性能,如台农三号的抗病性較强而产量最高,又能抗旱,台农46号的抗病性最高,但产量則較低,因而台农三号是最有希望的品种,但在岑溪試驗地,会略有發現蔓割病(可能是薯瘟病原之一),临桂試...

甘薯瘟是一种具有十余年历史的病害,不仅严重地威胁着广西东南部几县的甘薯生产,同时也严重影响了广东西南部和广西毗鄰的几个县的甘薯生产。甘薯瘟是一种枯萎类型的病害,是侵染維管束的脉管病害,首先侵染插条与土壤接触部位,先呈水漬狀,继而变黑腐爛并向上發展,叶色不正常或呈黄色而萎垂。此时薯藤的不定根根尖脫皮并开始腐爛,最后全株枯死。如在結薯块后才受病,除薯藤显现枯萎現象外,可向薯塊發展而呈褐色条斑,最后变黑腐烂,發出刺鼻臭辣气味。瘟薯的病原初步認为是由细菌和镰刀菌所致。细菌中可分为白色粘滑型,黄色粘滑型,白色干绉型和黄色干绉型;鐮刀菌中包括白色气生菌丝型,白色菌丝基層稍呈紫紅色型,粉紅色菌丝基層呈紫紅色型,无气生菌丝型等。但究以哪类为主导,抑系并發性呢?仍須进一步研究。薯瘟病原的傳播,初步認为有三种方式:带病薯块和薯苗,病土,及昆虫(如小象鼻虫等),其中以前二种較为肯定,后一种則仅属可能,仍有待+于进一步試驗观察。甘薯各品种間确具有不同的抗病性能,如台农三号的抗病性較强而产量最高,又能抗旱,台农46号的抗病性最高,但产量則較低,因而台农三号是最有希望的品种,但在岑溪試驗地,会略有發現蔓割病(可能是薯瘟病原之一),临桂試驗田也会發生过多次。老藤繁殖会降低同一品种的抗病性和产量,值得我們注意。在旱地和水田不同試驗地上所得結果,可初步说明發病情况很不一致,追肥与不追肥处理的發病率也不一致。藥剂处理种苗效应不显著,翻晒土壤及二种种植法試驗结果不一致,想与試驗方法、試驗地不同和供試品种不同有密切关系。薯瘟的發生与發展和高温潮湿有密切关系,而这些气候因素对于植株的早期生??長壮健及增强抗病性也有关系。初步建議,在北流地区以立秋(8月上旬)种植較为适当。从临桂雁山、北流和岑溪三处的气候記录,和薯瘟开始發生与最后發生日期的記录看来,可以初步說平均气温23.4—28.4℃最适于薯瘟的發生。相对湿度平均在80%以上亦适于本病的發生。由此可見,在临桂雁山地区,薯瘟可能是容易發生的,不过停止發病日期会提早10—20天。其他地区如有相似气温与湿度情况,那也是会發生薯瘟的。根据二年試驗結果和調查所得情况,初步提出防治薯瘟的办法如次:(1)应采取种薯和种苗的檢疫措施,禁止病区的种薯运往無病地区,以防蔓延;(2)选育抗病品种为主,結合先进的栽培管理法;多施草木灰,适当施用石灰,根外追肥,适期种植等,以增强植株的抗病性,避免病害的侵染,保証丰产。目前在岑溪及北流地区,可先推广种植“台农三号”品种,并提倡以薯塊育苗,切勿采用老藤繁殖,以避免植株的衰退,减少薯瘟的發生。

Some intergeneric hybrids between wheat variety Chinese spring(2n=6x=42)and H.bulbosum(2n=4x=28)were obtained by dri-pping GA_3 to the wheat stigmas one day after pollination and then byculturing the young embryos in vitro 12-16 days later.It was found thatthe hybrids were self-sterile,while in backcross with monosomic 5Bof Chinese spring as the male parent,three B_1F_1 plants were obtained.The morphological characters of F_1 and B_1F_1 manifested an apparenthybrid vigor.Both the shape and structure of spikes...

Some intergeneric hybrids between wheat variety Chinese spring(2n=6x=42)and H.bulbosum(2n=4x=28)were obtained by dri-pping GA_3 to the wheat stigmas one day after pollination and then byculturing the young embryos in vitro 12-16 days later.It was found thatthe hybrids were self-sterile,while in backcross with monosomic 5Bof Chinese spring as the male parent,three B_1F_1 plants were obtained.The morphological characters of F_1 and B_1F_1 manifested an apparenthybrid vigor.Both the shape and structure of spikes of B_1F_1 were simi-lar to those of F_1,the long and awned spikes were like the male parent,and the polyanthous spikelets like the female parent.The awns of F_1and B_1F_1 were shorter than those of their male parent.The flag leavesof B_1F_1 were longer than those of F_1 and their parents evidently.Fur-thermore,both of F_1 and B_1F_1 showed resistance to Fusarium spp.andErysiphe graminis as their male parent.There were 24-30 chromosomesin a number of pollen mother cells of F_1 at metaphase Ⅰ;while therewere 45-49 chromosomes(20-21 pairing disomes and 3-7 monosomes)inmost pollen mother cells of B_1F_1 at diakinesis.when B_1F_1 was self orbackcrossed to either parent,a partial fertility was obtained.It isexpected that an alienaddition line of wheat may be obtained by selfingand backcrossing through generations.

本试验选用抗病性较强的球茎大麦(2n=28)为父本,以普通小麦(2n=42)为母本,进行属间杂交,授粉24小时后,在母本柱头上滴赤霉酸,促使幼胚生长,以中国春单体5B 为母本杂交,获得了少量结实的杂交种子;以中国春为母本的,则结合离体培养杂种幼胚,以获得属间杂种。杂种自花不育,而以中国春单体5B 与之回交,获得三株回交一代杂种(B_1F_1)。杂种 F_1与 B_1F_1代的植株性状有明显的杂种优势; 二者穗部形态结构基本相似,均为穗形细长、有芒似父本,而小穗之多花性则似母本;F_1和 B_1F_1与其父本球茎大麦一样对赤霉病和白粉病等严重的小麦病害具有抗性。观察其染色体数,F_1在24~30之间,而B_1F_1染色体数在45~49之间(其中大多数终变期细胞有20~21个配对的二价体,3~7个单价体)。B_1F_1代自交与回交均有部分结实。预计经过继续自交和回交,可能在后代中获得抗病的小麦异附加系。

The root diseases of cotton seedling have caused heavy losses of cotton production in Henan provence recently. In 1983 the root diseases of cotton seedling were investigated and the pathogens have been isolated there after. The result shows that Fusarium root rot ( F.spp. ) , anthracnose (Colletotrichum gossypii Southw.) are the first serious diseases with a frequency of 81.61%;cotton soreshin (Rhizoctonia solani Kühn ) ranks the second with a frequency of 5.2%; other diseases with a frequency of...

The root diseases of cotton seedling have caused heavy losses of cotton production in Henan provence recently. In 1983 the root diseases of cotton seedling were investigated and the pathogens have been isolated there after. The result shows that Fusarium root rot ( F.spp. ) , anthracnose (Colletotrichum gossypii Southw.) are the first serious diseases with a frequency of 81.61%;cotton soreshin (Rhizoctonia solani Kühn ) ranks the second with a frequency of 5.2%; other diseases with a frequency of 15.07%. New systemic fungicide 25% Bayleton w.P. (1-(4-Chloro-phenoxy)-3,3-dimethyl-1-(1H-1,2,4-triazol-lyl)-2-butanone) has been tested for controlling cotton seedling rot diseases caused by Fusarium spp., Colletotrichum gossypii and Rhizoctonia solani in laboratory condition respectively. The effect of Bayleton to control these diseases is much better than either Badistan or Terraclor. making cotton seedling strong. It is safe to treat cotton seeds by dressing the seeds with 25% Bayleton w.p. at the rate of 0.05% or 0.08%. So far no harmful effects have been found on their germination and growth, but the period for emergence of the seedling may be delayed by one to three days.

河南省棉苗根病主要是红腐病(Fusarium spp.)和炭疽病(Colletotrichum gossypii Southw.),出现率占81.61%;其次是立枯病(Rhizoctonia Solani Kuhn.),出现率只有5.2%;其它病害占15.07%。用25%粉锈宁可湿性粉剂分四种拌种量(0.05%,0.08%、0.1%及0.2%)对棉苗红腐病、炭疽病、立枯病及连作棉田混合根病进行了防治试验研究。用多菌灵和五氯硝基苯作药剂对照。结果肯定了25%粉锈宁拌种(0.05—0.08%为安全用量)的防病作用,表现有蹲苗、壮苗作用,地下部根系发达白嫩,地上部叶片浓绿肥厚。对出苗量无不良影响,对出苗期有推迟1—3天的现象。

 
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