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fungicidal
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  杀菌
    The Synthesis and the Fungicidal activities of Some New Heterocyclic Compounds
    具有杀菌活性的新型杂环化合物的合成及其生物活性研究
短句来源
    Studies on the Synthesis of S-Alkyl-O-polychlorophenyl Thiophosphoric(─nic) Acid Derivatives and Their Fungicidal Activities
    S-烷基-O-多氯苯基硫代磷(膦)酸衍生物的合成及杀菌活性研究
短句来源
    Synthesis and Fungicidal Activities of 2-Substituted Amino-4,6-dichloropyrimidines
    2-取代氨基-4,6-二氯嘧啶类化合物的合成及其杀菌活性
短句来源
    In search of safer and more effective fungicidal compounds,eight N-(4,6-disubstitued pyrimidin-2-yl)-benzamides were designed and synthesized. Their structures were confirmed by IR,1H NMR,LC/MS and elemental analysis.
    为了寻找高效、安全的杀菌活性化合物,设计并合成了8个N-(4,6-二取代嘧啶-2-基)苯甲酰胺类化合物,其化学结构经1HNMR、IR、LC/MS和元素分析确证。
短句来源
    Preliminary bioassay showed that some of the title compounds showed good fungicidal activity,for example,4g exhibited 85.1% inhibition rate to Pyricularia oryzae at 25 mg/L and 4f exhibited 92.9% inhibition rate to Gibberella zeae at 25 mg/L.
    初步生物活性测定结果表明,该类化合物具有一定的杀菌活性,当浓度为25mg/L时,化合物4g对稻瘟病菌Pyricularia oryzae的抑制率达85.1%,化合物4f对小麦赤霉病菌Gibberella zeae的抑制率达92.9%。
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    Study on Fungicidal Screening Method
    杀菌剂筛选方法的研究
短句来源
    THE STUDY ON FUNGICIDAL BIOASSAY METHOD
    杀菌剂生物测定方法的研究
短句来源
    QSAR Study on Fungicidal Activity of 1,3-Nitrogen, Sulphur Heterocyclic Compounds against Ascochyta as Paraginsa
    1,3-氮硫杂环化合物防治芦笋茎枯病的QSAR研究
短句来源
    Synthesis and Fungicidal Activity of Derivatives of 1,3-Dimethyl-5-methylthio-4- phenylhydrazonocarboxyl Pyrazole
    1,3-二甲基-5-甲硫基-4-苯腙基羰基吡唑的合成及抑菌活性
短句来源
    Synthesis and Fungicidal Activity of Methyl N-methoxy-N- [2-(3-trifluoromethyl-1-substituted pyrazol-5-yloxymethylene)] phenylcarbamates
    N-甲氧基-N-[2-(3-三氟甲基-1-取代吡唑-5-氧甲基)]苯基氨基甲酸甲酯的合成及生物活性研究
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  fungicidal
Synthesis and Fungicidal Activity of 1,3,4-Oxadiazole Substituted Acylthioureas
      
From biological testing, it is found that some of these compounds have good fungicidal activity.
      
Desire) were transformed with a pH22Kneo vector harboring the gene ac2, which encodes the fungicidal peptide (defensin) from the seed of amaranth (Amaranthus caudatusL.).
      
Fungicidal and fungistatic effects of biological preparations involving bacteria of the genera Pseudomonas and Bacillusand fungi of the genusChaetomium on phytopathogenic fungi Didymella applanata and Botrytis cinereawere evaluated.
      
We studied the fungicidal activity of a biological preparation from the fungi of the genus Chaetomium against soil phytopathogenic fungi Rhizoctonia solani and Fusarium oxysporum.
      
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Following a series of experiments conducted in East China Agricultural Re-search Institute (Nanking) during the past years,the "red arsenic",a well-knownraw-drug (containing approximately 90% of As_2O_3,9% of AS_2S_2 and 1% of mis-cellaneous substances),is found to be acceptable as seed disinfectant for the controlof cereal smuts.This raw-drug is not only excellent in effectiveness,but alsoeasily obtainable in this country. Incidence of infection of wheat bunt in the plots receiving 3 different treatments,namely,red...

Following a series of experiments conducted in East China Agricultural Re-search Institute (Nanking) during the past years,the "red arsenic",a well-knownraw-drug (containing approximately 90% of As_2O_3,9% of AS_2S_2 and 1% of mis-cellaneous substances),is found to be acceptable as seed disinfectant for the controlof cereal smuts.This raw-drug is not only excellent in effectiveness,but alsoeasily obtainable in this country. Incidence of infection of wheat bunt in the plots receiving 3 different treatments,namely,red arsenic (inoculated seed grains dusted at the rate of 0.05 % by weight),copper carbonate (0.3%),ethyl mercury phosphate (0.05%),during the last 4years,averaged 0.2%,1.4% and 2.7%,respectively against 44.8% in the control.The corresponding figures for the flag smut of wheat were respectively 3.1%,0.8%,5.0% against 20.5%; for the covered smut of barley,0.9%,1.1%,0.9% against1.6%; for the kernel smut of oats,6.8%,3.1%,0.5% against 41.4%.The resultsmake us believe that this native raw-drug is not inferior,in some cases even su-perior,to other fungicides now extensively manufactured and considered efficientin preventing the various cereal smuts.But in the control of the covered smut ofbarley,as we have already shown elsewhere,another native raw-drag,sulphur ismore effective.In the last 3 years,field experiments were carried out to studywhether arsenic gives beneficial effect on the germination of seed and on the yieldof grain.Arsenic was applied as dust to the clean seed wheat following thestandard hot water treatment.Data showed that the number of seedlings in asingle 12-ft.row ranged 368-400 from treated seed as compared with 362-386 fromuntreated seed.Yield of grain also increased 4.7 to 23.6 per cent.It is,there-fore,evident that this fungicidal dust,when properly used,is at least not injuriousto seed wheat.The following points,however,must be borne in mind when thearsenic treatment is put into practice: (1) The dosage should not be higher than0.05 per cent and lower than 0.005 per cent by weight of seed grain.Otherwise, ??it would be either injurious to seed germination or ineffective for disease control.(2) Arsenic can be applied only to thoroughly dried seed grain. Seed wheat con-taining 24% of moisture when treatment was made, lost its vitality in a very fewdays, while that with less than 12% moisture can be stored for one month withoutspoilage. (3) Arsenic reduced germination of seed grain after storage at the highertemperatures. Under laboratory conditions, seeds, treated during hot summer whenthe air temperature ranged between 31 and 35℃, largely lost their germinativecapacity within half a month, but seeds, treated in cooler season when air tempera-ture dropped below 22℃, germinated as untreated ones after being stored for 3months or longer. (4) The relative humidity during storage played the most im-portant role in causing arsenic injury to the seeds. Seeds of wheat containingproper moisture (around 12%) dusted with arsenic at correct rate (0.05% byweight), failed to germinate after being stored for 5 days at temperatures above30℃ under 100% r.b.; but there was little or no injury after a storage period ofover 7 months at 37℃ under 18% r.h. (5) The length of storage period is alsoa factor in causing arsenic injury, and at the same time affecting the efficiency ofthe treatment. Seeds dusted with arsenic at a dosage of 0.05% during mid-summer(July of 1953) retained their germinative capacity within 0.5 month, but no seedsgerminated after 2.5 months' storage. On the other hand, almost complete controlof disease was obtained from thoroughly infested seed grain dusted with 0.0125%of arsenic and stored for 60 days, but similarly treated seeds which were sownimmediately, gave 45.15% infection as compared with 72.77% in the check plot.Consequently, the proper method of using arsenic against cereal smuts is to dustthoroughly dried seed grain at the rate of 0.05-0.0125% by weight and to storetreated seeds under cool (below 25℃) and rather dry (around 80% of r.h.) con-ditions for a period of about one month. According to the results obtained from experiments conducted under bothlaboratory and field conditions, it is found that there is no synergism nor antago-nism between arsenic and such filling materials as ashes, slake lime, talc, charcoalpowder, and calcium phosphate; and that neither soil temperature nor soil moistureact as factors influencing the germination of treated seeds.

(一)用紅砒粉末作為種子消毒處理藥劑,對於幼苗感染性的小麥腥黑穗、小麥稈黑穗及燕麥堅黑穗等,有極良好的防治效果。但對大麥堅黑穗及條斑病,則不見功。(二)紅砒使用得法,對於麥種絕對無害;而且對於大麥、小麥的清潔種子,有積極的增產作用;惟對於燕麥還未能肯定。(三)紅砒粉末的拌種用量,當以種子重的0.025—0.05%為準簧僦?.005%,仍有殺菌效果。(四)為了增大藥物的容積,使得微量的紅砒粉末能够均勻週到地沾着每一麥粒,可用滑石粉、木灰末、甚至消石灰、草木灰或過磷酸鈣來稀释。(五)麥種拌砒後,須經一定期間的貯藏後播種,方顯出其强大的殺菌防病效果珉S拌隨種,則效果较少。至貯藏期間的久暫,則當因季節和用量等等而異。大致可以一個月為度。(六)紅砒使用不得其法,易起藥害。而藥害有無的關键,主耍在於拌砒後貯藏中的濕度,其次才是温度。如充分乾燥,在酷暑的氣候條件(37℃)下,貯藏7個月,尚??無妨礙。至於播種時的地温土濕,則關係極微。(七)紅砒的藥害與麥種處理當時的含水量有密切關係.含水量多,極為蝛U;含水量在12%以下,即安全無礙。(八)在自然狀况下用紅砒處理麥種,應當避去炎夏季節。又麥種拌砒前,必須充分晒乾。拌砒後...

(一)用紅砒粉末作為種子消毒處理藥劑,對於幼苗感染性的小麥腥黑穗、小麥稈黑穗及燕麥堅黑穗等,有極良好的防治效果。但對大麥堅黑穗及條斑病,則不見功。(二)紅砒使用得法,對於麥種絕對無害;而且對於大麥、小麥的清潔種子,有積極的增產作用;惟對於燕麥還未能肯定。(三)紅砒粉末的拌種用量,當以種子重的0.025—0.05%為準簧僦?.005%,仍有殺菌效果。(四)為了增大藥物的容積,使得微量的紅砒粉末能够均勻週到地沾着每一麥粒,可用滑石粉、木灰末、甚至消石灰、草木灰或過磷酸鈣來稀释。(五)麥種拌砒後,須經一定期間的貯藏後播種,方顯出其强大的殺菌防病效果珉S拌隨種,則效果较少。至貯藏期間的久暫,則當因季節和用量等等而異。大致可以一個月為度。(六)紅砒使用不得其法,易起藥害。而藥害有無的關键,主耍在於拌砒後貯藏中的濕度,其次才是温度。如充分乾燥,在酷暑的氣候條件(37℃)下,貯藏7個月,尚??無妨礙。至於播種時的地温土濕,則關係極微。(七)紅砒的藥害與麥種處理當時的含水量有密切關係.含水量多,極為蝛U;含水量在12%以下,即安全無礙。(八)在自然狀况下用紅砒處理麥種,應當避去炎夏季節。又麥種拌砒前,必須充分晒乾。拌砒後,必須貯置高燥處所。

In recent years,the Rhizoctonia blight of rice in southern part of Kiangsi province hasassumed an epidemic scale.The disease was found to be encouraged by close planting and high nitrogen fertilization.In general,semi-glutinous rice varieties were more susceptible than non-glutinous and glutinous.There were also varietal difference in susceptibility within each group.Effectiveness of sweeping out the sclerotia off the flooded fields before planting and apply-ing fungicidal materials on flooded fields before...

In recent years,the Rhizoctonia blight of rice in southern part of Kiangsi province hasassumed an epidemic scale.The disease was found to be encouraged by close planting and high nitrogen fertilization.In general,semi-glutinous rice varieties were more susceptible than non-glutinous and glutinous.There were also varietal difference in susceptibility within each group.Effectiveness of sweeping out the sclerotia off the flooded fields before planting and apply-ing fungicidal materials on flooded fields before planting and on growing plants in diseasecontrol were studied.Application of 1,500 kg.per hector of tea seed cake before plantingappeared to be promising.

近年来水稻纹枯病在江西南部地区发生普遍而严重,已成为水稻丰产的障碍。株间光照弱,温度高,通风不良,相对湿度高会促进病害的严重发生。在农业栽培措施中,肥料,尤其是氮素肥料对发病影响最大,氮肥愈多病害愈重,肥料配合与施用方法和插秧密度也影响病害的发生,分蘖后浅水灌溉,发病较轻,合理落水晒田可抑制病势发展,不当的栽培技术引起水稻倒伏,会促进病害剧烈发展,而病害的加重又促进植株倒伏。水稻感病程度的轻重依次为粳、籼、糯。粳稻一般发病较重。品种间抗性差异极大,但尚未见免疫品种。同一品种不同品系也有差异,经过选育的新品系,抗病程度有一定增强。在防治上,捞除田间菌核有一定防病作用。插秧前,利用药剂消毒、稻田淹水层,防病增产效果较大,其中茶籽饼液药效最好,田间防治效果71.5—95.8%,增产稻谷6.8—47.3%。消毒早稻田后,对晚稻防病增产仍有残效。

Investigations on the effect of various mono-, di-, and trivalent metallicsalts and fungicidal substances on the free phages of Xanthomons oryzaejndicated that the most prevalent OP1 type phage of the organism was inactivatedboth by ferrous and ferric salts, while ferric salts were more effective thanferrous salts. Iron salts at proper concentrations will inactivate the freephages but without any noticeable effect on those adsorbed and the susceptiblehostbacteria. The concentration of the solution required...

Investigations on the effect of various mono-, di-, and trivalent metallicsalts and fungicidal substances on the free phages of Xanthomons oryzaejndicated that the most prevalent OP1 type phage of the organism was inactivatedboth by ferrous and ferric salts, while ferric salts were more effective thanferrous salts. Iron salts at proper concentrations will inactivate the freephages but without any noticeable effect on those adsorbed and the susceptiblehostbacteria. The concentration of the solution required to inactivate the phagesvaries between 3-5×10~(-5) M to 1×10~(-3)M depending on the concentration ofthe phage suspension to be inactivated, but a solution of 1×10~(-4)M seems to besuitable in most cases. Results of experiments indicate that the iron salts arevery similar to the antiserum in their reaction to the phages, and can be usedin place of antiserum in various aspects of phage investigations.

在测定单价、二价和三价金属盐和杀菌物质等对水稻白叶枯病菌[Xantho-monas oryzae (Uyeda et Ishiyama)Dowson]噬菌体影响的过程中,发现铁盐可以钝化OP1型的游离噬菌体,而时已经被吸附的噬菌体则完全没有影响。铁盐的钝化噬菌体主要是铁离子的作用。三价铁盐的钝化作用比二价亚铁盐强。对低浓度的噬菌体悬浮液(n×10~4/毫升),其最低有效浓度为3-5×10~(-3)M;对高浓度(n×10~(8-9)/毫升)的噬菌体悬浮液,其最低有效浓度为1×10~(-3)M。铁盐溶液的浓度超过1×10~(-3)M时,不仅使游离噬菌体全部钝化,对细菌也有致死作用。铁盐对噬菌体的作用,与噬菌体抗血清的作用在有些方面是相似的。在噬菌体性状的测定和有些其他研究中,可以用铁盐溶液代替抗血清。例如,在OP1型噬菌体的一步生长曲线实验中,用铁盐或抗血清处理所得的结果是非常接近的。

 
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