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ec
相关语句
  乳油
    36%Shenle EC
    36%渗乐乳油
短句来源
    Field Efficacy of 20% Carbosulfan EC on Cotton Aphid
    20%丁硫克百威乳油防治棉田蚜虫试验研究
短句来源
    Study on the Application of 20% Mansujing EC to Control Red Spider of Orange Tree
    20%螨速净乳油防治柑桔红蜘蛛应用研究
短句来源
    Screening and Effectiveness of theComposed Pesticide 20% TrB EC
    复配杀虫剂20%唑威乳油的筛选与药效
短句来源
    EFFECTS OF TOOSENDANIN 0.5 EC TO SEVERAL INSECT NATURAL ENEMIES
    0.5%楝素杀虫乳油对天敌昆虫的影响
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  “ec”译为未确定词的双语例句
    Test on the Control of Tea Comphor Scale with 40% Methidathion EC and 25% Phosmet EC
    40%杀扑磷防治茶蛇眼蚧药效试验
短句来源
    The inhibition mechanism of antifungi substance produced by Streptomyces 702 on Rhizoctonia solania in rice was studied. Streptomyces 702 can strongly inhibit mycelium growth and EC50 is 1.12805 mg/L.
    研究了链霉菌702所产抗真菌活性物质对水稻纹枯病菌的抑菌机制,结果表明:702对纹枯病菌菌丝生长有强烈的抑制作用,EC50为1.12805mg/L;
短句来源
    The EC50 values of azoxystrobin,carbendazim and thiram against mycelial growth of R. solani on PDA were 0.072 4 μg /mL,1.134 4 μg /mL and 1.202 6 μg /mL,respectively.
    嘧菌酯、多菌灵和福美双对立枯丝核菌菌丝生长的EC50值分别为0.0724、1.1344和1.2026μg/mL。
短句来源
    The results showed that the EC50 values of B and Z to all the strains ranged from 2.33 μg/mL to 49.47 μg/mL and from 3.51 μg/mL to 82.05 μg/mL,respectively;
    结果表明:百菌清(B)对各参试菌株的EC50值在2.33~49.47μg/mL之间,平均值为9.35(±2.77)μg/mL;
短句来源
    and the EC50 mean values were 9.35(±2.77) μg/mL and 10.59(±4.06) μg/mL,respectively.
    代森锰锌(Z)对各参试菌株的EC50值在3.51~82.05μg/mL之间,平均值为10.59(±4.06)μg/mL。
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  ec
Compounds 2d, 3f, 3a, and 3c exhibited antiviral activity against HSV-1, MAY, and VSV virus with EC50 values of 6.8, 2.2, 4.8, 0.52, 2.5, and 1.0.
      
The half effective concentration EC50 of scavenging hydroxy radicals of compound THDB is 53.1 μmol/L, while that of scavenging hydroxy radicals of compound TTDB is 47.3μmol/L.
      
The remanent polarization (Pr) and coercive electric field (Ec) of the measured PZT thin films are 47.7 μC/cm2 and 18 kV/cm, respectively.
      
Fine mapping of an Arabidopsis thaliana male sterile mutant EC2-157
      
An Arabidopsis thaliana male sterile mutant EC2-157 has been isolated using an EMS mutagenesis strategy.
      
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The present paper deals with the residue studies of Phoxim on the tea-bushes under natural sunlight and in artificially shaded field conditions. The residual amounts on fresh tea-shoots and in the made green tea were examined within definite periods after the spraying of 50% Phoxim EC at dilution of I : 800 with Thin. Layer Chroinatographical methods. The laboratory results of the photodegradation of Phoxim under different light sources are also presented.According to the laboratory results, it is concluded...

The present paper deals with the residue studies of Phoxim on the tea-bushes under natural sunlight and in artificially shaded field conditions. The residual amounts on fresh tea-shoots and in the made green tea were examined within definite periods after the spraying of 50% Phoxim EC at dilution of I : 800 with Thin. Layer Chroinatographical methods. The laboratory results of the photodegradation of Phoxim under different light sources are also presented.According to the laboratory results, it is concluded that Phoxim was a very photosensitive pesticide. About 99% of the Phoxim was photodegraded after 4 hours irridition of UV light, but it would last long in the dark condition. The pho-tosensitivities of Phoxim and two other comparable, pesticides were found to be in the following order : Phoxim > Malathion > Ethion.Under the natural sunlight field condition, Phoxim residues on the fresh tea-shoots were found to degrade rapidly. It decreased from the initial amount of 50.78 ppm (dry weight basis) to 6.36 ppm four hours after the application, and was unde-tectable after 2 days. The Phoxim residue in the made green tea was undetectable after 2 days. However, it degraded more slowly on artificially shaded tea-shoots. The amounts of Phoxim residues on the fresh shoots after the application were found to decrease from the initial amount 50.78 ppm to 18.57, 8.85, 4.61, 4.12, 2.14, < 0.50 ppm and trace at the 4th hrs., 24th hrs, 28th hrs., and 011 the 2nd day, 3rd day, 4th day and 5th day respectively. The residual amount in the made green tea nearly disappeared on the 5th day after the application.The authors suggested that with the concentration of 1 : 800 of 50% Phoxim EC, the awaiting period from spraying to plucking should be 3 days if sunny and 5-6 days if cloudy.

本文介绍了有机磷杀虫剂辛硫磷在茶树上的残留消解动态。试验是1973年在杭州进行,用50%辛硫磷乳剂800倍稀释液喷洒在遮荫条件和自然日照条件下的茶树上,每天采摘鲜叶,并制成成茶,用薄层层析法测定鲜叶及成茶中的辛硫磷残留量。本文还介绍了在室内条件下进行的辛硫磷光敏性试验结果。 根据室内试验结果表明,辛硫磷是一种光敏性极强的农药。在紫外光源照射下,4小时后光解99%左右。在自然漫射光下,4小时后光解50%以上,但在黑暗条件下较稳定,8小时仅分解17.5%。根据三种农药测定结果的比较,光敏性依如下次序递减:辛硫磷>马拉硫磷>乙硫磷。田间残留量测定资料进一步证实了这一实验结果。在自然日照条件下,根据实验结果,喷后4小时鲜叶中辛硫磷残留量下降85%以上,二天后即为痕迹量到无残留。成茶中一天后一般残留量降至0.5 ppm以下,二天后即无残留;但在遮荫条件下辛硫磷消解速度显著变慢,喷药后4小时鲜叶中残留量下降63%,为自然日照条件下的2.9倍,二天后仍有4.12 ppm,五天后仍有痕迹量残留。成茶中残留量一天后为4.02 ppm,五天后仍有痕迹量残留。 鲜叶中辛硫磷残留量经加工后消失50—80%左右。 本文提出了茶园中喷施...

本文介绍了有机磷杀虫剂辛硫磷在茶树上的残留消解动态。试验是1973年在杭州进行,用50%辛硫磷乳剂800倍稀释液喷洒在遮荫条件和自然日照条件下的茶树上,每天采摘鲜叶,并制成成茶,用薄层层析法测定鲜叶及成茶中的辛硫磷残留量。本文还介绍了在室内条件下进行的辛硫磷光敏性试验结果。 根据室内试验结果表明,辛硫磷是一种光敏性极强的农药。在紫外光源照射下,4小时后光解99%左右。在自然漫射光下,4小时后光解50%以上,但在黑暗条件下较稳定,8小时仅分解17.5%。根据三种农药测定结果的比较,光敏性依如下次序递减:辛硫磷>马拉硫磷>乙硫磷。田间残留量测定资料进一步证实了这一实验结果。在自然日照条件下,根据实验结果,喷后4小时鲜叶中辛硫磷残留量下降85%以上,二天后即为痕迹量到无残留。成茶中一天后一般残留量降至0.5 ppm以下,二天后即无残留;但在遮荫条件下辛硫磷消解速度显著变慢,喷药后4小时鲜叶中残留量下降63%,为自然日照条件下的2.9倍,二天后仍有4.12 ppm,五天后仍有痕迹量残留。成茶中残留量一天后为4.02 ppm,五天后仍有痕迹量残留。 鲜叶中辛硫磷残留量经加工后消失50—80%左右。 本文提出了茶园中喷施50%辛硫磷800倍液后距采摘的安全间隔期为3天(晴天)和5—6天(阴天)。

Dimethoate has been widely used for the control of tea pests suchas jassids,aphids and thrips etc.The present paper deals with the stu-dies on the degradation of dimethoate and dimethoxon in tea shoots.Acording to the results of experiment,it is concluded that underthe natural field conditions,dimethoate degrades moderately on thefresh tea-shoots.After the spraying of 40% dimethoate EC at dilutionof 1:800 and 1:1600,it decreases to less than 0.5 ppm and less than0.05 ppm respectively after 10 days.The...

Dimethoate has been widely used for the control of tea pests suchas jassids,aphids and thrips etc.The present paper deals with the stu-dies on the degradation of dimethoate and dimethoxon in tea shoots.Acording to the results of experiment,it is concluded that underthe natural field conditions,dimethoate degrades moderately on thefresh tea-shoots.After the spraying of 40% dimethoate EC at dilutionof 1:800 and 1:1600,it decreases to less than 0.5 ppm and less than0.05 ppm respectively after 10 days.The residue of dimethoate in themade green tea decreases to less than 1.0 ppm and 0.7 ppm respecti-vely 5 days after the application,and decreases to less than 0.1 ppmafter 9 days.Results indicate that the P=0 analoga(dimethoxon)canbe detected in the tea shoots which sprayed with dimethoate.Thereare less than 0.1 ppm to 0.27 ppm initially and increases graduallyand reaches the maximum at the 3-5 days after application then decrea-ses to less than 1 ppm about 6-9 days.The residue of dimethoxon in themade green tea reaches the maximum of about 1 ppm at the 3rd daysafter application and decreases to less than 0.1 ppm at 6th-9th days.The extraction percentage of dimethoate residue in the made tea withthe infusion procedure is relatively high about 41.4%.According to the results of investigation,the authors recommen-ded that the tolerance residue limits in the made tea may be establishedas 1 ppm(expressed as the sum of dimethoate and dimethoxon).Ac-cording to this,the residue of dimethoate and dimethoxon in the madetea which manufactured by the tea-shoots sprayed with 40% dimethoatEC at a dilute of 800 and 1600 may be decreases to less than 1 ppmafter 7 days and 5 days after the application.However,owing to thetiants of dimethoate to the made tea,so that the authers recommen-ded that the safety intervals should be delayed to 7 days(40% EC 2000dilute solution)and 10 days(40% EC 1000 dilute solution).

本文是介绍有机磷农药乐果及其主要代谢物氧乐果在茶树上的残留降解动态。根据实验结果,在自然条件下,乐果在茶树芽梢上的降解速度中等。喷施800倍和1600倍药液后,芽梢中的乐果含量10天后可降至<0.5ppm和<0.05ppm。干茶中的乐果含量5天后降至<1.0ppm以至0.7ppm,9天后降至<0.1ppm。在喷施乐果的茶树芽梢上可检出其氧化物一氧乐果。喷药后3—5天达最高值,以后渐降,6—9天后即降至

Results from the laboratory and field expcrinients carried out in 1975-1976 showed that Permethrin (NRDC 143) possessed outstanding effectiveness against lepidop-terous larvae and aphids infesting tea. Its LC50 and LC95 to 3rd instar larvae of the tea looper caterpillar Ectropis obliqun Warren were 0.85 and 4.41 ppm. respectively. When used at 3-5 grams per mu, it performed high efficiency in controlling the above pests. In the field, permethrin degraded mure slowly on tea-shoots The trans-isomer degraded faster...

Results from the laboratory and field expcrinients carried out in 1975-1976 showed that Permethrin (NRDC 143) possessed outstanding effectiveness against lepidop-terous larvae and aphids infesting tea. Its LC50 and LC95 to 3rd instar larvae of the tea looper caterpillar Ectropis obliqun Warren were 0.85 and 4.41 ppm. respectively. When used at 3-5 grams per mu, it performed high efficiency in controlling the above pests. In the field, permethrin degraded mure slowly on tea-shoots The trans-isomer degraded faster than the cis-isomer. Weather conditions showed slight influences. With the same dosage per mu the residue on tea-shoots sprayed with the ultra-low volume sprayer was about 85% higher than that sprayed with the ordinary knapsack sprayer, under natural condition Permethrin had comparatively week penetration into the tea leaves. The degradation rate of the residues of Permethrin in the course of tea manufacture was relatively low- The extraction percentage of Permethrin residue in the made tea with infusion procedure was 3.9% to 4.7%.Based on the results of our investigations and the no-effect level value proposed by Tadaomi Kadota in Japan and by Kuan Jiangsugshu Medical College in China, we propose the permitted residue limit in the made tea to be 3 ppm. According to this limit, the safety interval should bo 3 days after the use of 1: 5000-6000 dilute solutions of 10% Permethrin EC (about 3.3-4.0 grams per mu).

在田间条件下,二氯苯醚菊酯(以下简称“二氯”)在茶树新梢上降解缓慢,渗透性弱,在叶表始终保持较高的比例。以原始附着量计算,10%“二氯”3000倍液在茶树鲜叶上的半衰期为0.85天,在成茶中的半衰期为2.8天。反式异构体的降解速度高于顺式。在相同施药剂量条件下,超低容量喷雾的残留量比常量喷雾高85%左右。 由于“二氯”的蒸气压低,因此鲜叶中的“二氯”残留量在加工过程中降解率较低,平均45.2%;由于“二氯”水溶性弱,在泡茶过程中只有3.9—4.7%进入茶汤。 通过室内和田间试验,认为“二氯”是一种适于在茶叶生产中推广应用的优良农药品种。建议茶叶中“二氯”的允许残留标准暂定为3ppm,茶树喷施10%“二氯”5000—6000倍液后的安全间隔期为3天。

 
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