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防治试验示范
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  “防治试验示范”译为未确定词的双语例句
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    at the 1st and 2nd larval instar in field trials resulted in 75.5-97.4% control effect of A. bipunctata. Application of AbGV in conjunction with low dose of chemical insecticides considerably increased the control effect.
    AbGV制剂经田间防治试验示范结果,防治适期以1~2龄为宜,每亩喷施AbGV有效剂量为100~200mg,防治效果可达75.5%~97.45%,若与微量化学农药混用则有明显增效作用,病毒后效作用长达2~3年,自然感病死亡率18.76%~55.94%,AbGV的防治效果显著。
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    The demonstrative expereriment on compre-hensive prevent and Control of pland disease and insect was conducted in a relatively large agricultural area (106.1ha) in Shanyi village during 1984 - 1986. The experimental results were extensively applied in production from 1987 to 1989. A techniques regulation in prevention of pesticide pollution has been formulated in the village.
    本项调控工程分两步:1984—1986年在山一村106ha农田开展病虫害综合防治试验示范; 1987—1989年将试验成果应用于生产。
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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”。

In 1980, a granulosis virus was isolated from dead larvae of Andraca bipunctata Walker in tea gardens of Shucheng County, Anhui Province, and was identified as Andraca bipunctata Granulosis Virus (AbGV). This was the first discovery of this virus in China. The LC50 of AbGV to the third instar larvae of A. bipunctata was 1.23×10-7 mg/ml, and LT50 ranged from 5.4 to 8 days. Results of the laboratory infection tests showed that the first instar larvae were the most susceptible to the virus. Larval mortality decreased...

In 1980, a granulosis virus was isolated from dead larvae of Andraca bipunctata Walker in tea gardens of Shucheng County, Anhui Province, and was identified as Andraca bipunctata Granulosis Virus (AbGV). This was the first discovery of this virus in China. The LC50 of AbGV to the third instar larvae of A. bipunctata was 1.23×10-7 mg/ml, and LT50 ranged from 5.4 to 8 days. Results of the laboratory infection tests showed that the first instar larvae were the most susceptible to the virus. Larval mortality decreased with the increase of the larval instars and concentration of the virus. In the host range tests, AbGV was found to infect only A. bipunctata among the 12 insect species tested. It was safe to the silkworm, Bombyx mori and other beneficial insects. Spraying preparations of the virus at a dosage of 1,500-3,000 mg per ha. at the 1st and 2nd larval instar in field trials resulted in 75.5-97.4% control effect of A. bipunctata. Application of AbGV in conjunction with low dose of chemical insecticides considerably increased the control effect. The residual effect of AbGV in the tea gardens lasted 2-3 years. Mortality of naturally infected A. bipunctata by AbGV reached 18.7-55.9%.

1980年从安徽舒城县晓天茶园的茶蚕罹病虫体中分离获得一种颗粒体病毒,经鉴定为茶蚕颗粒体病毒(AbGy),为我国首次发现。对茶蚕3龄幼虫的半致死浓度LC_(50)为1.23×10~7mg/ml,半数死亡时间LT_(50)为5.4~8天。经感染试验,以1龄幼虫最敏感,感病死亡率随病毒浓度增大而相应提高。在感染12种昆虫中,只感染茶蚕,对桑蚕及天敌昆虫安全无伤害作用。AbGV制剂经田间防治试验示范结果,防治适期以1~2龄为宜,每亩喷施AbGV有效剂量为100~200mg,防治效果可达75.5%~97.45%,若与微量化学农药混用则有明显增效作用,病毒后效作用长达2~3年,自然感病死亡率18.76%~55.94%,AbGV的防治效果显著。

The demonstrative expereriment on compre-hensive prevent and Control of pland disease and insect was conducted in a relatively large agricultural area (106.1ha) in Shanyi village during 1984 - 1986. The experimental results were extensively applied in production from 1987 to 1989. A techniques regulation in prevention of pesticide pollution has been formulated in the village. The integrated measures for prevent pesticide pollution include: working out the control strategyi applying pesticide in optimum period...

The demonstrative expereriment on compre-hensive prevent and Control of pland disease and insect was conducted in a relatively large agricultural area (106.1ha) in Shanyi village during 1984 - 1986. The experimental results were extensively applied in production from 1987 to 1989. A techniques regulation in prevention of pesticide pollution has been formulated in the village. The integrated measures for prevent pesticide pollution include: working out the control strategyi applying pesticide in optimum period with rational dosei protecting and utilizing the natural enemies of insect i popularizing resistant plant varieties t spreading highly effective and less-persistent pesticides i applying N P and K fertilizers rationally t and so on. As a result, the remarkable economical , ecological and social benefits were achieved. The pesticide application dosage was reduced by 80. 6%. The residue, of organochlorine pesticides (such as BHC) in grain is in the range of permissible level (it was over the permissive level by 31. 6% in the past). The number of spiders in fields increased by 83. 3-180. 1% and that of Agamermis sp. (a kind of natural enemy of rice planthopper) raised to 3 times as high as that of the past.

本项调控工程分两步:1984—1986年在山一村106ha农田开展病虫害综合防治试验示范;1987—1989年将试验成果应用于生产。试验研究取得了明显的经济效益、生态效益和社会效益:农药用量比1983年前减少80.6%,稻谷中农药残留不超标(原有机氯农药666残留超标率31.6%);害虫天敌稻田蜘蛛增加83.3—180.0%,稻虱多索线虫增加2倍;防治农药成本减少53.7%。并制定了《山一村农田农药污染防治技术规程》,其主要内容有:开展病虫害“二查二定”,达到防治指标时用药;制定病虫害防治策略,在防治适期内用药;推广高效低残留农药,遵守农药安全间隔期;推广抗性良种,适施N肥,增施P、K肥;保护利用天敌,发挥天敌自然抑制作用。

 
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