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  phoxim
In 1969, diatomaceous dust mixtures and seed-piece soaks containing 5% captan, methiocarb, or phoxim applied at a rate of 1 1b/acre gave effective control of the seed-corn maggot and seed-piece decay.
      
Photolysis of phoxim on glass and on tomato leaves
      
The insecticidal and repellent effect of the following insecticides was investigated against stored product insects: bioresmethrin; chlorphoxim; fenitrothion; lindane; permethrin; phoxim; pyrethroid-H; rotenone; tetramethrin.
      
The number of mites steadily increased from the first detection of mites until a first phoxim treatment.
      
Epidemiology of Dermanyssus gallinae and Acaricidal Efficacy of Phoxim 50% in Alternative Housing Systems during the Laying Peri
      
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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,...

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)。

The European corn borer(Ostrinia nubilalis)is one of the major pest insects of grain crops in Hopei Province.In the past satisfactory control may be achieved by using granulated insecticides at the late whorl stage of the corn.But in recent years the infestation by this pest has aggravated in districts where the cultivation system has changed.This paper reports the occurrence and the integrated control of this insect in Yung-ching County,1974.The results of our study may be summarized as follows.1.Our field...

The European corn borer(Ostrinia nubilalis)is one of the major pest insects of grain crops in Hopei Province.In the past satisfactory control may be achieved by using granulated insecticides at the late whorl stage of the corn.But in recent years the infestation by this pest has aggravated in districts where the cultivation system has changed.This paper reports the occurrence and the integrated control of this insect in Yung-ching County,1974.The results of our study may be summarized as follows.1.Our field observations on the development of the European corn borer have shown that when the summer corn is sown between rows of growing wheat,the eggs of the second generation of the pest will be deposited mainly on corn plants at the tasseling-silking stage.When the summer corn is sown after the wheat is harvested as before,the eggs will be equally divided between the corn plants at late whorl stage and those at the tasseling-silking stage.This is the reason why the damage on corn by this insect at tasseling-silking stage is increased in recent years.2.Several insecticides and their mixtures have been tested and some of them are found to be good substitutes for the organochlorine insecticides used before.The effectiveness of 1%,0.5% and even 0.25% granulated E605 were found higher or a little lower than the 5% granulated DDT When 0.5% or 0.1% E605 is added to the soil granules of the white muscardine fungus(Beauveria bassiana)(1:20),the effectiveness is higher or a little lower than the 5% DDT granules respectively.0.1% and 0.2% Phoxim granules are more effective than 0.1% 666 granules.C-9140 soil granules(1:10)are as effective as 5% DDT granules.3.According to our experience the integrated control of the European corn borer in our district may include the following steps:destruction of the host plant debris in the winter,attracting and killing the adult moths by light traps,and the combined use of the fungus and chemical insecticides.

玉米螟是河北省主要粮作害虫。过去在玉米心叶期应用颗粒剂防治已可基本控制为害。近年来一些地区耕作改制后玉米螟的为害又有所回升。我们1974年在永清县对耕作改制后玉米螟的发生进行了系统调查,采用农业、物理、化学、生物等措施,进行综合防治试验、示范,初步明确了以下几个问题: 1.通过对玉米螟发生期及生活史的系统调查,初步澄清耕作改制后,夏玉米由收麦后平播,改变为麦垄套播,玉米螟第二代卵,主要产在抽雄吐丝期,而麦茬平播夏玉米则心叶期和穗期各半。这点是近年穗期螟害加重的主要原因。 2.通过试验、示范,找出代替有机氯治螟的药剂。如1%、0.5%、0.25%1605颗粒剂效果高于或略低于5%DDT颗粒剂;白僵菌20倍加0.5%1605,或白僵菌20倍加0.1%1605颗粒剂,效果分别高于或稍低于5%DDT颗粒剂。0.1%、0.2%辛硫磷颗粒剂效果高于0.1%六六六颗粒剂。2.5%螟铃畏颗粒剂,效果与5%DDT颗粒剂相仿。 3.通过采用农业、物理、化学、生物等综合措施,我们认为本地玉米螟的综合防治概括为:“越冬防治,处理秸秆,诱杀成虫,压低虫源;田间防治,菌药结合,安全经济,控制为害”。

Based on the fact that white grubs used to devour seedbuds and seed coats Phoxim was found to be effective to control Holotrichia oblita by seed treatment and this insecticide can be used for this purpose to substitute those which are highly toxic to mammals or have long residual effect.Seeds treated with Phoxim solution to the proportion of 0.0375%(Phoxim/seed)by weight can give a stable protection for the seedlings with results better than 90%,the duration of its residual effect in the soil...

Based on the fact that white grubs used to devour seedbuds and seed coats Phoxim was found to be effective to control Holotrichia oblita by seed treatment and this insecticide can be used for this purpose to substitute those which are highly toxic to mammals or have long residual effect.Seeds treated with Phoxim solution to the proportion of 0.0375%(Phoxim/seed)by weight can give a stable protection for the seedlings with results better than 90%,the duration of its residual effect in the soil is 25 days,arid it causes no detriment to wheat,corn,sorghum,etc.Large scale application with wheat gave stable,satisfactory results.When Phoxim was used to control mole crickets by seed treatment,dead seedlings may appear in the late stage and thus the protective effect was not so good as in the case of white grubs.When seed treatment was combined with the application of granular formulation,better effects could be obtained in the early spring and autumn sowings.

蛴螬取食萌发种子和残存种皮是药剂拌种杀虫保苗的生物学依据。应用高效低毒低残留农药——辛硫磷拌种,可以逐步取代当前常用的高残留、剧毒类农药.改变目前防治现状。 应用种子上有效含量0.0375%的辛硫磷拌种,保苗效果稳定在90%以上,在土壤中残效时间为25天,且对小麦、玉米、高梁等作物无药害表现。经47万余亩麦田示范应用,一致表现药效稳定,人畜安全。 拌种还可兼治蝼蛄,惟后期出现死苗,保苗效果稍差。采用拌种加颗粒剂方法,可以提高早春和秋播拌种的药效。

 
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