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insecticides
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  杀虫剂
     The Study on Insecticides of Recombinant Baculovirus of Helicoverpa Armigera Functional Genes and the Establishment of Cell Lines from H. Armigera
     棉铃虫功能基因重组病毒杀虫剂研究及棉铃虫细胞系的建立
短句来源
     RESEARCHES ON ORGANOPHOSPHORUS INSECTICIDES. Ⅱ. O,O-DIALKYL S-ALKYL (SUBSTITUTED ALKYL) THIO METHYL PHOSPHORODITHIOATE
     有机磷杀虫剂的研究Ⅱ. O,O-二烷基S-烴基(取代烴基)硫甲基二硫代磷酸酯的合成
短句来源
     RESEARCHES ON ORGANOPHOSPHORUS INSECTICIDES Ⅲ. THE SYNTHESIS OF O-ETHYL N, N-DLETHYL PHOSPHOROAMIDO-THIONOCHLORIDATE AND ITS REACTION WITH SODIUM HYDROSULFIDE
     有机磷杀虫剂的研究Ⅲ.O-乙基N,N-二乙氨基硫代磷酰氯的合成及其与硫氢化鈉的反应
短句来源
     SELECTIVE ORGANOPHOSPHORUS INSECTICIDES SYNTHESIS OF O,O-DIALKYL S-CARBOALKOXYALKYL PHOSPHORODITHIOATES
     选择性有机磷杀虫剂 O,O-二烷基 S-烷基酯基烷基二硫代磷酸酯的合成
短句来源
     THE OVICIDAL ACTIVITIES OF SOME NEW INSECTICIDES
     几种新杀虫剂的杀卵活性
短句来源
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  农药
     The toxicity discharge capacities of pesticides in total and for one hectare were 2794. 36 x 106t/hm2 and 21. 50t/hm2 respectively. The average LDso of used insecticides was 48mg/kg.
     农药总排毒系数和每公顷的排毒系数分别是2794.36×10~6t/hm~2和21.50t/hm~2,使用杀虫剂的平均LD_(50)为48mg/kg。
短句来源
     Detection limits of 6 insecticides were 0.0002 mg/kg ~0.016 mg/kg. The recoveries of 6 insecticides ranged from 72% to 125% with relative standard deviation of 6.7%~20%.
     该方法的检出限量为 0 0 0 0 2mg/kg~ 0 0 1 6mg/kg,1 0种蔬菜 6种农药的标准添加 (0 0 1、0 0 2、0 1、0 2mg/kg)的回收率为 72 %~ 1 2 5 % ,测定的相对标准偏差为 6 7%~ 2 0 %。
短句来源
     Determination of 9 insecticides in food by GC/MS
     食品中9种常用农药的GC/MS研究
短句来源
     When SLNPV of 10~(6)PIB/mL was added to chemical insecticides,the synergic ratio is 2.75 and 2 at the fifth day,LT_(50)is shortened by 10.472 d and 6.402 d at the seventh day.
     终浓度为5×106PIB/mL的SLNPV农药稀释液,5 d的毒力倍数为2.75和2,其理论值LT50分别缩短10.742 d和6.402 d。
短句来源
     Adopting HP-1(30m×0.25μm×0.25mm)capillary column,GC/MS was used to 9 common sorts of insecticides,disinfectants and acaricide pesticides to proceed the accurate qualitative analysis.
     采用HP - 1(30m× 0 .2 5 μm× 0 .2 5mm)毛细管柱 ,气相色谱 /质谱联用仪 (GC/MS)对 9种常用杀虫剂、杀菌剂和杀螨剂农药进行准确定性分析。
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  “insecticides”译为未确定词的双语例句
     The linearity for NMCs standards was good(r=0.991-0.997)and the detection limits of 5 carbamate insecticides were 3.2-13.3μg/kg.
     5种NMCs检测限为 3 2~ 13 3μg kg ,标准曲线线性良好 ,(r=0 991~ 0 997)。
短句来源
     The average recoveries from untreated control samples fortified with the seven carbamate insecticides at levels of 0.1,0.5 and 5.0 mg/kg ranged from 79.00% to 102.37%,and the coefficient of variation was from 0.99% to 10.03%.
     当添加0.1,0.5,5.0mg/kg时,添加回收率为79.00%~102.37%,变异系数为0.99%~10.03%;
短句来源
     Inhibition of pyrethroid insecticides on nerve Ca-ATPase, Ca-Mg-ATPase in house flies (Musca domestica)
     拟除虫菊酯对家蝇Ca-ATPase和Ca-Mg-ATPase的抑制作用
短句来源
     The results showed that when the temperature was 20 ℃,the LC-(50) value of imidacloprid was 6.412 1 mg/L,the contact toxicity was obviously higher than any of acetaniprid,thiamethoxam and F4 EC,when the temperature was 25 ℃ and 30 ℃,the LC-(50) of acetaniprid were 2.828 1 mg/L and 1.549 5 mg/L respectively,the contact toxicity was the highest of the four insecticides.
     结果表明:20℃时,吡虫啉的LC50为6.412 1 mg/L,触杀毒力明显高于啶虫脒、阿克泰、F4; 25℃,30℃时啶虫脒的LC50值分别为2.828 1 mg/L,1.549 5 mg/L,触杀毒力明显高于吡虫啉、阿克泰、F4。
短句来源
     The average recoveries of the analytical method for the fortified samples of 9 carbamate insecticides and their matabolites were between 70.7% and 108.0%,RSD was less 18%,the range of the limit of detection was 0.01~0.03 mg/kg.
     方法的最低检测限为0.01~0.03mg/kg,加标平均回收率为70.7%~108.0%,相对标准偏差小于18%。
短句来源
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  insecticides
The molecular design, synthesis and optimization of lead compounds are important to the development of insecticides.
      
The preparation is compatible with insecticides (carbofos, vismetrin, talstar, and applaud) and certain fungicides (such as baitan).
      
Effects of p-Nitrophenol and Organophosphorous Nitroaromatic Insecticides on the Respiratory Activity of Free and Immobilized Ce
      
Improving the Selectivity of the Determination of Organophosphorus Insecticides and Carbamates by Enzyme Assay
      
The structures, properties, methods of chemical synthesis, and insect hormonal activities of insecticides of a new 1-alkyl-1,2-diacylhydrazine series are reviewed.
      
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In order to determine the practical value of the Bordeaux mixture as acontrol measure for the cotton leafhopper, a field experiment was designedand carried out in 1943 at Shatang, Liuchow, Kwangsi. Three known effective contact poisons, namely, a water suspension ofYam bean seed power (Gross Smith value 1%) (1:1000), a water suspension ofpyrethrum powder (1:600), and a water extract of tobacco (Nicotine content2.35%) (1:100) were applied at the same time with two types of Bordeauxmixture (4-6-50 and 2-4-50)...

In order to determine the practical value of the Bordeaux mixture as acontrol measure for the cotton leafhopper, a field experiment was designedand carried out in 1943 at Shatang, Liuchow, Kwangsi. Three known effective contact poisons, namely, a water suspension ofYam bean seed power (Gross Smith value 1%) (1:1000), a water suspension ofpyrethrum powder (1:600), and a water extract of tobacco (Nicotine content2.35%) (1:100) were applied at the same time with two types of Bordeauxmixture (4-6-50 and 2-4-50) for four applications at a fifteen-day intervalduring the early growth season of cotton from June 15 to July 30. The popula-tion of leafhopper, the degree of infestation, the number of green bolls andthe yield of lint cotton were statistically analyzed and discussed. Population observations showed that the three contact poisons greatlyreduced the leafhopper population on the first day after application. Butthey soon lost their effectiveness three days later, so that the population startedto rebuild up and was practically with no significant difference from that ofhe untreated plots at the end of the fifteen-day interval. While the Bordeaux mixture showed a maximum reduction of population on the third day afterapplication, and maintained its effectiveness for a considerable time; the pop-ulation was constantly checked to such an extent that no serious damage wouldoccur during the spray interval. The degree of infestation as indicated by the symptom of cyrtosis onleaves was 40.83, 47.21, 55.85, 57.66, 62.48, and 60.39 per cent in average for4-6-50 Bordeaux mixture, 2-4-50 Bordeaux mixture, yam bean seed powdersuspension, pyrethrum powder suspension and tobacco water extract and theuntreated check plots respectively. Moreover, the percentage of heavily in-fested plants for the treated and untreated plots in the fore-mentioned orderwas 5.61, 8.24, 21.88, 23.68, 28.88 and 25.27 respectively.It was evident thatin the long run the Bordeaux mixture was the most effective insecticide inreducing the degree of infestation. The number of bolls per plant was 15.27, 13.24, 10.17, 9.53, 8.75 and6.75 in average, and the yield of lint cotton was 19.50, 17.84, 11.69, 10.11and 6.24 catties per mou (1 catty=0.5 kilogram, 1 mou=0.164 acre) for thetwo types of Bordeaux mixture and three kinds of contact poisons and theuntreated check plots respectively. The yield of cotton was generally much lower in 1943 than in 1942 forthe same experimental field. This was apparently due to the poorer soilfertility and heavier leafhopper infestation in 1943. But the ratio of the yieldbetween the Bordeaux mixture treated plots and the check plots was quitedifferent in the two years, i.e. 55.62 to 31 catties per mou in 1942, and 19.50to 6.24 catties per mou in 1943. This revealed a fact that the Bordeauxmixture treatment will he applied more effectively and profitably where thecotton field is not fertile and when the leafhopper outbreak is severe. 4-6-50 Bordeaux mixture and 2-4-50 Bordeaux mixture were in all casesinsignificantly different in their effectiveness. Theiefore a 2-4-50 Bordeauxmixture would be a more economical and practical measure for the cottonleafhopper control.

(一)本试验应用三种防治棉浮(鹿土)子之有效接触剂,烟草、除虫菊、及豆薯种子,与两种配合式之波尔多液;4—6—50式及2—4—50式,同时在棉田内每半月施用一次,自六月半至七月底共施用四次。比较其消减虫口,减轻受害程度及增加产量诸功能,藉以证明波尔多液之特性。 (二)1000倍豆薯种子粉悬液、600倍除虫菊粉悬液、及100倍烟草水,三者不论在消减虫口,减轻受害程度,以及增加产量各方面,其功能均相若,无显著差异。 (三)4—6—50式波尔多液与2—4—50式波尔多液,对于治虫、减害及增产各功能,亦无显著差异。 (四)豆薯种子粉悬液、除虫菊粉悬液、及烟草水三种接触剂经施用后一天之治虫效力,均显较波尔多液为优,惟至第三天,差异便不显著,三天以后,波尔多液之功效反日见优越。此显示波尔多液之持久特性。 (五)棉浮(鹿土)子之虫口发生愈多,则波尔多液之功效愈著。因其效力持久,所抑制之虫口可还较接触剂为低。 (六)波尔多液减轻棉叶之受害程度,因其药效持久,附属牢固,保护力强,故亦较三种接触剂为优。 (七)施用波尔多液后,结铃数显然增加。其功效亦优于三种接触剂。 (八)施用波尔多液后,每亩皮棉产量亦显著增加。本年结果,施用4...

(一)本试验应用三种防治棉浮(鹿土)子之有效接触剂,烟草、除虫菊、及豆薯种子,与两种配合式之波尔多液;4—6—50式及2—4—50式,同时在棉田内每半月施用一次,自六月半至七月底共施用四次。比较其消减虫口,减轻受害程度及增加产量诸功能,藉以证明波尔多液之特性。 (二)1000倍豆薯种子粉悬液、600倍除虫菊粉悬液、及100倍烟草水,三者不论在消减虫口,减轻受害程度,以及增加产量各方面,其功能均相若,无显著差异。 (三)4—6—50式波尔多液与2—4—50式波尔多液,对于治虫、减害及增产各功能,亦无显著差异。 (四)豆薯种子粉悬液、除虫菊粉悬液、及烟草水三种接触剂经施用后一天之治虫效力,均显较波尔多液为优,惟至第三天,差异便不显著,三天以后,波尔多液之功效反日见优越。此显示波尔多液之持久特性。 (五)棉浮(鹿土)子之虫口发生愈多,则波尔多液之功效愈著。因其效力持久,所抑制之虫口可还较接触剂为低。 (六)波尔多液减轻棉叶之受害程度,因其药效持久,附属牢固,保护力强,故亦较三种接触剂为优。 (七)施用波尔多液后,结铃数显然增加。其功效亦优于三种接触剂。 (八)施用波尔多液后,每亩皮棉产量亦显著增加。本年结果,施用4—6—50式波尔多液者,产量较对照区增多3.12倍,2—4—50式波尔多液区较对照区增产2.85倍

In the previous paper, we reported the formation of bis(O,O-diethyldithiophosphate) disulfide as an intermmediate product in the course of chlorination of O,O-diethyldithiophos phoric acid. During the past decade, much effort has been directed towards the synthesis of mixed phosphoric esters and esters of phosphoric anhydrides, some of them being found as powerful insecticides. The disulfide with the general, known as "phos phatogen," has not been closely investigated, and apart from isolated cxamples,...

In the previous paper, we reported the formation of bis(O,O-diethyldithiophosphate) disulfide as an intermmediate product in the course of chlorination of O,O-diethyldithiophos phoric acid. During the past decade, much effort has been directed towards the synthesis of mixed phosphoric esters and esters of phosphoric anhydrides, some of them being found as powerful insecticides. The disulfide with the general, known as "phos phatogen," has not been closely investigated, and apart from isolated cxamples, little about this class of compounds has been recorded in the li'erature. Considering their possible insecticidal and fungicidal activities, we prepared a series of the disulfides, aliphatic as well as aromaic, and examined some of their chemical properties.In connection with the investigation stated above, we needed various O,O-dialkyldithiophos phoric acids as intermmediates. The reaction bstween monohydroxy alcohols, polyhydroxy alcohols and different types of phenols with phosphorus pentasulfide were studied. Methyl, ethyl, i-propyl, n-butyl, i-butyl, i-amyl i-amyl and cyclohexyl alcohols reaced with phosphorus pentasulfide smoothly to give O,O-dialkyldithiophosphoric acids in 80-90% yield. The reaction product of polyhydroxy alcohols, namely, ethylene glycol, trimethylene glycol, or glycorol with phosphorus pentasulfide was not homogeneous; we failed to isolate from it the expected product. Although pbenol and β-naphthol reacted with phosphorus pentasulfide equally smoothly, no expected dithiophosphoric acids were obtained from chlorophenols and nitrophenols.Pure sodium salts of the O,O-dialkyldithiophosphoric acids were oxidized by calculated amount of bromine in cold aqueous solution to give the disulfides in 58-85% yield. Eight different disulfides, were propared, where R represents methyl, ethyl, i-propyl, n-butyl, i-butyl, n-amyl, i-amyl, cyclohexyl or phenyl radical. Among these substances only the last one decomposed spontaneously in anhyhrous state within a few days, while the other members were quite stable and unchanged after four months.The disulfides exhibited typical radical or polar cleavage reactions of the unit, since they dissolved in cold aqueous sodium sulfide to form sodium salts of the ditbiophosphoric acid with separation of free sulfur. In alcoholic silver nitrate, they separeted in the form of silver salts of the corresponding dithiophosphoric acids according to the following equation:With alcoholic mercuric chloride, the formation of a double salt instead of the cleavage of -S-S-bond was observed. A series of the double salts with the general formula were prepared, where R represents methyl, ethyl, i-propyi, n-butyl, i-butyl, i-amyl, cyclohexyl or phenyl radical.

本實驗研究了各類醇及酚与五硫化二磷的作用,各種一元醇,苯酚与β-萘酚与五硫化二磷生成相當的二硫代磷酸O,O-二烴基酯,但多元醇,氯代苯酚,硝基苯酚与五硫化二磷作用後,均未得預期的產物。本實驗合成了八種二硫代磷酸O,O-二烴基酯的汞鹽,九種雙(硫代磷酸O,O-二烴基酯)二硫物及八種二硫物的氯化汞複鹽。二硫物是一類比較活潑的化合物,其-S-S-鍵易被離子化藥劑所離解,同時呈一定的氧化性能。二硫物有失去一個硫原子的傾向,硫原子成為游離狀態析出或与金属成硫化物。

In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf...

In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf sheath and spike,particularly the bristle,while that onthe "green-stem" varieties was the yellowing of the leaf blade.In all instances,thediscoloration was usually accompanied by shortening of internode,stunting of thewhole plant.wrinkling of leaf surface,slight waviness of leaf margin,deformationof spike and underdevelopment of root systems.Plants infected at an early stagewere severely stunted and on heads were produced. It has been demonstrated that the red-leaf disease of the foxtail millet was causedby a virus readily transmitted by at least three different species of grain-infestingaphids:corn aphid,Rhopalostiphum maidis Fitch;grain aphid,Macrosiphum granari-um Kirby;and green-bug,Toxoptera graminum Rond.Tests with non-viruliferouscorn aphid eliminated the possibility of direct aphid injury as the cause of the disease. ??The virus was not transmissible by mechanical inoculation,by seeds nor through thesoil. Studies on the mode of transmission of red-leaf virus by corn aphid indicatedthat the virus was persistent in its insect vector and could infect in succession aseries of at least 27 tested millet seedlings.The aphid was unable to acquire thevirus in a 5-minute feedling period on the virus source but was able to pick up thevirus in 10-minute period.The 8-hour acquisition feeding period was optimum forthis aphid.The testing feeding period was found to be not more than 5 minutesand a 4-hour period of confinement on the diseased plant was ample for the aphidto cause maximum infection.Attempts to transmit the virus with cotton aphid.Aphisgossypii Gloner peach aphid,Aphis persicae Sehult and soybean aphid,Aphis glycinesMats,have given negative results.The incubation period for symptoms of the red-leaf virus in foxtail millet ranged from 10 to 32 days with the model period beingbetween 14 to 20 days. Under natural conditions,certain cultivated cereals and grass weeds showed thesymptoms resembling the red-leaf disease of foxtail millet.Among them,were ZeaMays L.,Panicum miliaceum L.,Setaria lutescens (Weigel) Hubb.,S.viridis (L.)Beauv.,Digitaria sanguinalis (L.) Scop.Echinochloa crusgalli (L.) Roem.,Eragrostiscilianensis (All.) Link,E.pilosa (L.) Beauv.,Arundinella anomala Steud,Spodiopogonsibiricus (Steud.) Trin.,Bothruochloa ischaemum (L.) Keng.,Capillipedium parviflor-um (R.Br.) Stapf and Poa practensis L..Artificial inoculation with the corn aphidproved that the first six named plant species,including the two cereals,were susce-ptible to the red-leaf virus and they produced,in all cases,the typical symptoms.Tests with the rest sexen grass weeds are in progress. The results of disease control experiments by timely spraying with an insecticide,E605,under field conditions were inconsistent.Among the 349 foxtail millet varie-ties of foxtail millet examined in the experimental field,nine of them were foundto be highly torelant to and suffered only very slightly from the attack of the red-leaf virus.These varieties were,however,succeptible in aphid transmission experiments. Available evidences point to the conclusion that the red-leaf virus of the foxtail millet herin reported is quite different from all the previously described cereal viruses.Among the cereal virus that closely resembles the red-leaf virus is the yellow-dwarfvirus reported by Oswald tnd Hauston.These two viruses are similar in the follow-ing respects:both are transmissible by the same species of aphids (Rhopalosiphummaidis,Microsiphum graminium andToxoptera granarium) and neither virus can betransferred mechanically.But they differ strikingly from each other in their hostranges.According to Oswald and Hauston,there were 19 of 55 grasses tested thatappeared to be immune from the yellow-dwarf virus.Digitaria sanguinalis,Echino-chloa crus-galli Setaria viridis and Zea Mays were among the immune hosts.On thecontary,all these four gramineous plants were found to be extremely susceptible tothe red-leaf virus both under natural condition and in artificial inoculation experi-ments.Accordingly,the red-leaf,a persistent aphid borne virus affecting the foxtailmillet,is herein reported as a new virus of the cereals.

小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、六月禾和大油...

小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、六月禾和大油芒均感染小米紅叶病病毒。其它紅化杂草和接种試驗,正在进行中。紅叶病病毒对小米植株所产生的影响,因植株發育的阶段不同而輕重有所差异,植株感病愈早病害愈剧烈。用杀虫剂E605在田間噴射小米防治紅叶病,未能表現药剂有防病的效能,在田間观察349个品种,选得9个高度耐病和农艺性状优良的品种。抗病选种可能是当前防治小米紅叶病最有效的防治措施。根据病原的傳染方法,寄主范围和所表現的症状,小米紅叶病病毒和以往所报道的禾本科植物的病毒病害的病毒均不相同,因此它是禾谷类作物的一个新的病毒。

 
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