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fusarium     
相关语句
  镰刀菌
     Inhibitory effects of nystatin (14. 4 ~ 16. 0 mg. L-1 ), tablet k (4. 0 mg. L- 1 ) and malachitegreen (3. 0 ~ 4. 0 mg. L-1 ) on Fusarium Fu2 and jian F1 were strong, but on Fu1-2 were weak.
     研究发现制霉素(14.4~16.0mg·L-1)、K制剂(4.0mp·L-1)和孔雀绿(3,0~40mp·L-1)对镰刀菌Fu2和尖F1抑制效果好,而对Fu1-2抑制效果差;
短句来源
     , Fusarium spp.
     、镰刀菌(Fusarium spp.)
短句来源
     ,Fusarium spp.
     、镰刀菌(Fusarium spp.)
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     ,Fusarium avenaceum(Corda et Fr.)
     ]、燕麦镰刀菌[Fusarium avenaceum(Corda et Fr.)
短句来源
     , Black steile fungus, Fusarium sp. , Papulospora sp. A, Rhizoctonia solani Kühn.
     ,黑色不产孢菌(Black steile fungus),镰刀菌(Fusarium sp.) ,丝葚霉A(Papulospora sp.A),丝核菌(Rhizoctonia solani kühn)。
短句来源
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  镰刀菌属
     , Verticillium Nees, Fusarium Lk ex Fr.
     镰刀菌属(Fusarium Lk ex Fr.) ;
短句来源
     ② In the isolated species,the percentage is Penicillium 22.4%,Paecilomyces 15.9%,Alternaria alternate 14.0%,Mucor 12.9%,Candida 9.8%,Aspergillu 4.0%,Fusarium 1.8% and others 19.2%.
     ②分离菌株中各种属所占比例为青霉属22.4%、拟青霉属15.9%、链格孢霉14.0%、毛霉属12.9%、念珠菌属9.8%、曲霉属4.0%、镰刀菌属1.8%及其他19.2%。
短句来源
     Totally 26 species of Fungi belonging to 14 genera were detected from 70 patients, including 22 strains belong to Fusarium (33.8%), 20 strains belong to Curvularia (30.8%), 4 strains belong to Aspergillus (6.2), 4 strains belong to Coccidiodes (6.2%) and 15 strains belong to other genera (23.1%).
     检出菌种分属14个属26个种,其中镰刀菌属22株(33.8%),弯孢霉属20株(30.8%)、曲霉属4株(6.2%),球孢子菌属4株(6.2%),其他菌属15株(23.1%)。
短句来源
     22 genera were obtained in the summer, in which Penicillium sp., Mucor sp., Echinobotryum sp., Fusarium sp. and Humicola sp. etc.
     夏季分离得到22个属的454株真菌,主要类群为青霉属(Penicilliu sp.)、毛霉属(Mucor sp.)、刺葡萄孢霉属(Echinobotryum sp.)、镰刀菌属(Fusariu sp.)和腐质霉属(Humicola sp.)
短句来源
     Second, 52 Fusarium strains isolated from Taxus mairei, Torreya grandis and Cephalotaxus fortunei have been identified with molecular biological methods.
     二、用分子生物学方法对分离自南方红豆杉(Taxus mairei)、香榧(Torreya grandis)和三尖杉(Cephalotaxus fortunei)的共52株的镰刀菌属(Fusarium sp.)
短句来源
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  镰孢属
     , Fusarium spp.
     、镰孢属(Fusarium spp.)
短句来源
     Alternaria and Botrytis was predominant(45.5% )of the total number,followed by Penicillium(15.7%), Stemphylium(12.6%), Fusarium(7.8%), Cladosporium(6.5%), Pythium(4.9%),Phytophthora(3.8%) and Trichothecium(3.3%).
     而青霉属(Penicillium)、匐柄霉属(Stemphylium)、镰孢属(Fusarium)、芽枝霉属(Cladosporium)、腐霉属(Pythium)、疫霉属(Phytophthora)和聚端孢霉属(Trichothecium)依次占15.7%、12.6%、7.8%、6.5%、4.9%、3.8%和3.3%。
短句来源
     、 Fusarium Link、 Geotrichum Link.
     外瓶霉属、Fusarium Link镰孢属、Geotrichum Link.
短句来源
     Study on the Fusarium from Southern China──Ⅰ.Fusarium Subglutinans and Its Taxonomic Position
     中国南方镰孢属的研究─—Ⅰ.胶孢镰孢及其分类地位
短句来源
     1. By using the primers ITS1/ITS4, only Fusarium isolates could be amplified to produce a special fragment of 750bp. This product generated 480bp, 200bp and 100bp fragments after digested by restriction enzyme HinfⅠonly from the pathogen of Cucurbits Fusarium Wilt.
     1.引物ITS1/ITS4只在镰孢属菌株上扩增到一条750bp分子片段,其他供试菌株无扩增条带产生,扩增产物经HinfⅠ酶解后,只有瓜类尖镰孢菌产生480bp、200bp和100bp 3条带,说明该PCR-RFLP程序对瓜类尖镰孢菌具有特异性;
短句来源
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  镰刀霉
     Studies on the endophytic fungus Fusarium verticillioides show that the major biological products of DIMBOA decomposition are HMPMA,AMPO and BOA-X.
     通过对植物内生性轮状镰刀霉(Fusarium verticillioides)的研究表明,丁布的生物降解产物主要为HMPMA,AMPO,BOA-X。
短句来源
     The average killing rates of Candida albicans exposed to its stock solution for 8 h and Fusarium solani exposed for 12 h were over 90.00%.
     对白色念珠菌作用 8h,对茄科镰刀霉菌作用 12h,平均杀灭率均大于 90. 00%。
短句来源
     Result The dominant fungal propagators in indoor environment were Cladosporium sp, Aspergillus sp, Alternaria sp, Fusarium sp, Penicillium sp, and temperature, humidity and outdoor fungi spore counts were the major factors to affect the total indoor fungi spore counts.
     结果 室内环境中的主要真菌污染源为芽枝菌属、曲霉属、交链孢属、镰刀霉属、青霉属等 ,影响室内真菌分布的主要因素为温度、湿度及室外菌落数 ;
短句来源
     The population of bacteria, actinomycete,fungi,verticillium,bacillus subtilis,aspergillus niger,blue mold and fusarium in sterilized soil was counted,and the results showed that to sterilize soil by microwave could kill pathogen effectively,and properly sterilizing could increase the soil fertility.
     对消毒后土壤中的细菌、放线菌、真菌及病原微生物轮枝孢、枯草芽孢、青霉、黑曲霉、镰刀霉进行检测,结果表明,采用微波消毒土壤可以有效杀灭病原菌,适当的微波消毒方法可提高土壤肥力。
短句来源
     Based on the above characteristics, this strain was identified as Fusarium solani.
     根据以上特征 ,该菌鉴定为茄病镰刀霉
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  fusarium
The cell extract showed activity against Candida albicans, Aspergillus niger, Trichoderma viridae, Fusarium moniliforme and Alternaria brassicicola.
      
Biological Evaluation of a Secondary Metabolite, 9-O-methylfusarubin, from Fusarium oxysporum
      
urophylla can inhibit the proliferation of pathogenic fungi Fusarium oxysporum, Pyriculerie grisea, Glorosprium musa rum and Phytophthora capsici.
      
Maize Response to Salicylic Acid and Fusarium moniliforme
      
Effects of salicylic acid and Fusarium moniliformeon trypsin inhibitor activity, lectin activity, lectin carbohydrate specificity, and salicylic acid content in maize seedlings were studied.
      
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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。

Cotton seeds collected from plants infected by Verticillium ablo-atrum were used for the purpose of studying seed transmission of the pathogen. Although verticilliate conidiophores had been observed occasionally under low-power microscope on the surface of the seeds plated on PDA in 1955, yet isolations of the organism failed due to the interference of several contaminants. Seeds were delinted in order to diminish the possibility of interference from lint-born contaminants. The materials were plated on different...

Cotton seeds collected from plants infected by Verticillium ablo-atrum were used for the purpose of studying seed transmission of the pathogen. Although verticilliate conidiophores had been observed occasionally under low-power microscope on the surface of the seeds plated on PDA in 1955, yet isolations of the organism failed due to the interference of several contaminants. Seeds were delinted in order to diminish the possibility of interference from lint-born contaminants. The materials were plated on different culture media such as PDA, acidified PDA, cotton meal agar and rice agar. All these plates failed to show verticillium colonies. Among the fungi obtained in these plates, Fusarium, Alternaria and Colletotrichum were the most frequent. Since both Verticillium albo-atrum and other fungi were harbored within the same seed, the difference of growth rates might be considered as an important factor involved in the difficulty of the isolations: Cultures of V. albo-atrum and Fusarium sp. were transferred simutaneously to PDA plates to test their growth rates. The diameter of their colonies were measured after incubation for 12 days under 22±1℃. Those of V. albo-atrum measured 2.8 cm., while the average of the latter was 9,3 cm. Interference of the fast-growers might render a slow-grower such as V. albo-atrum to be masked in the observations and to be depressed in the isolations. A method was developed to avoid the interference. The fundamental procedures of the method are outlined as follows. 1. Plating and observation. (1) Cotton seeds being delinted with commercial surphuric acid in order to avoid the interference from lint-born contaminants. (2) Delinted seeds being washed in a flask covered with wire gauze for 24 hours under running tap water in order to get rid of bacteria. Absorption of sufficient water during washing activates the hibernating mycelium. (3) Seeds being plated on 1.7% water agar instead of nutrient agar in order to diminish the growth of the fast-growers such as Fusaria and Alternaria. The plates being incubated under 22±1℃. for 15 days. (4) The plates being uncovered and observed directly under low-power microscope in order to observe the fungi undisturbed. 2. Isolation and preservation of the Verticillium cultures. (1) Verticilliate conidiophores being located under low-power microscope. (2) The tip of a flamed needle moistened with sterile agar being introduced within the microscopic field in order to fish the spores under focus. (3) Spore suspension being made by washing the needle in a 5 cc sterile water blank. (4) Dilution plates being made by placing 1 cc of the spore suspension in a petri dish and diluting with 10 cc of cotton stem agar. (5) The plates being observed under low-power microscope after incubation for 5—7 days at 22±1℃. (6) Verticillium colonies being locatad and a bit of the margin of a colony being transferred to PDA slant. (7) The slant cultures being flooded with sterile liquid paraffin after incubation for 7—15 days at 22±1℃. The cultures preserved with liquid paraffin were able to keep alived for 2 years. Seeds collected from the infected plants in 1955, 1956 and 1957 were studied. The percentages of seeds carrying Verticillium observed in these years were 39.8, 5.92 and 9.5% respectively. One of the representative single spore colonies obtained was identified as V. albo—atrum. Inoculation and reisolation tests showed positive results. Inspection of cotton seed samples collected from eight co-op farms in Shensi Province in 1958 showing that the percentages of seeds infected by verticillium ranged 3 to 23% with an average of 12.3%.

(1) 在陝西关中所采的黄萎病病株棉籽內部,常带有一些真菌和細菌,虽經用浓硫酸脫絨,这些菌类仍能从棉籽本身的組織內向培养基伸展惺庇玫捅剁R直接检查虽亦能見到輪枝菌从棉籽內露出,但由于其他菌类的生长速度較快,以致輪枝菌常被干扰,无从在洋菜上发展,故用一般方法很难分离和检查到棉籽所带的輪枝菌。(2) 用不含养分的水洋菜作为培养基时,杂菌的生长減弱,轮枝菌才能在基物上发展为菌落。又用流水冲洗法代替表面消毒,使棉籽吸收水分,同时也促使潛伏菌絲继續发展,并可冲去細菌。經試驗用上述两个步驟可以使棉籽所带的輪枝菌在水洋菜上形成菌落。結合低倍鏡直接检查法,可以較为方便地检查种籽带菌率。(3) 經初步拟定了一套检查方法和单孢子菌种分离法。惟应用时尚觉不够簡便,尚有待于进一步提高,特提出以供交流經驗。(4) 在1955—1957年的多次检查中,查得黄萎病病株棉籽带輪枝菌率为39.8%、5.9%及23.7%。在1958年初对大田种子进行检查,查得华阴等四县8个样品中带菌率为3%至23%,平均为12.3%。(5) 根据棉籽解剖培养結果,轮枝菌不仅存在于棉籽外部的短絨內,并且也存在于籽壳及籽仁上。(6) 从棉籽上分离到的轮枝菌特8号...

(1) 在陝西关中所采的黄萎病病株棉籽內部,常带有一些真菌和細菌,虽經用浓硫酸脫絨,这些菌类仍能从棉籽本身的組織內向培养基伸展惺庇玫捅剁R直接检查虽亦能見到輪枝菌从棉籽內露出,但由于其他菌类的生长速度較快,以致輪枝菌常被干扰,无从在洋菜上发展,故用一般方法很难分离和检查到棉籽所带的輪枝菌。(2) 用不含养分的水洋菜作为培养基时,杂菌的生长減弱,轮枝菌才能在基物上发展为菌落。又用流水冲洗法代替表面消毒,使棉籽吸收水分,同时也促使潛伏菌絲继續发展,并可冲去細菌。經試驗用上述两个步驟可以使棉籽所带的輪枝菌在水洋菜上形成菌落。結合低倍鏡直接检查法,可以較为方便地检查种籽带菌率。(3) 經初步拟定了一套检查方法和单孢子菌种分离法。惟应用时尚觉不够簡便,尚有待于进一步提高,特提出以供交流經驗。(4) 在1955—1957年的多次检查中,查得黄萎病病株棉籽带輪枝菌率为39.8%、5.9%及23.7%。在1958年初对大田种子进行检查,查得华阴等四县8个样品中带菌率为3%至23%,平均为12.3%。(5) 根据棉籽解剖培养結果,轮枝菌不仅存在于棉籽外部的短絨內,并且也存在于籽壳及籽仁上。(6) 从棉籽上分离到的轮枝菌特8号經初步鉴定系Verticillium albo-atrum Reinkeet Berth。(7) 特8号菌种經过接种試驗,确定其具有一定的致病力,并从再分离中获得該菌。(8) 棉籽是否能够传播黄萎病,似系一个检查方法問題。还希各方面进行测定,通过多次的检查和接种試驗始能充分确定。(9) 在分离的菌种中,除特8号菌种具有較深的菌落色泽外,还有一些菌种的顏色較淡,未須鑑定。棉籽所带的轮枝菌类型不一,还有进一步研究的必要。此外,棉籽內的輪枝菌和其他一些菌类究竟如何进入籽內,也有研究的价值。

Studies of the cotton wilt pathogene,Fusarium oxysporum f.vasinfectum (Ark.) Snyderet Hansen,was made in Kiangsu Province.Of the various isolates,two races,one collectedfrom Nanking and another from Chi-Tung were identified.The varieties of Gossypiumhirsutum were susceptible to Nanking race which was unable to infect varieties of other cottonspecies so far tested.Chi-Tung race infected all examined varieties of G.barbadense,G.hirsutum,and G.arboreum.On basis of a comparative study of the Nanking race and...

Studies of the cotton wilt pathogene,Fusarium oxysporum f.vasinfectum (Ark.) Snyderet Hansen,was made in Kiangsu Province.Of the various isolates,two races,one collectedfrom Nanking and another from Chi-Tung were identified.The varieties of Gossypiumhirsutum were susceptible to Nanking race which was unable to infect varieties of other cottonspecies so far tested.Chi-Tung race infected all examined varieties of G.barbadense,G.hirsutum,and G.arboreum.On basis of a comparative study of the Nanking race and theAmerican ones,the former was tentatively considered to be identical to the latter.Markeddifferences were noted between Chi-Tung race and those described by Armstrong in both thecultural characters and pathogenicity.Therefore,the Chi-Tung race was considered to be anew race.

根据江苏省不同枯萎病区病株的病症,不同菌系的培养性状,和对不同棉种的致病性状,可把江苏棉枯萎病菌分成南京型和启东型两个类型。前者只为害陆地棉,与美国的枯萎病菌相似。后者对陆地棉、海岛棉和中棉均能侵害,与南京型菌系有明显差别。因此认为启东型是枯萎病菌的一个新的类型。

 
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