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玉米心叶末期
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  “玉米心叶末期”译为未确定词的双语例句
     Field plot tests on the control of the European corn borer,Pyrausta nubilalis Hubn. ,withgranulated insecticides were carried out at Heng-shui,Ho-pei,during the year 1960-1961.One application of 5% DDT granules at the late whorl stage reduced the earlier borerpopulation about 80-90%,and the insecticides deposited in the leaf axils remained sufficientlyeffective for the control of those larvae hatched after tasselling.
     1960—61连续二年在河北衡水施用颗粒剂防治玉米螟:春、夏玉米心叶末期用5% DDT 颗粒剂,不仅前期的螟虫减少了80—90%左右,穗期的螟害也适当地被控制。
短句来源
     According to our studies,TH6040 has very high activity and out-standing effect against the corn borer.
     田间试验证明:在春玉米心叶末期施用一次0.045%TH_(6040)颗粒剂,第一代幼虫存活数量降低80%。
短句来源
     Field plot and single plant tests were conducted at the late centtal-leaf stage to evaluate yield losses of maize induced by the Asiatic corn borer (Ostrinia funacalis) .
     玉米心叶末期,采用田间小区试验和被害单株减产测定,以研究玉米螟害对产量损失的影响。
短句来源
     Both indoor and field tests showed that 12 5% diniconazole W P was a very good funggicides to control fungus Ustilago maydis Granule, a mixture of diniconazole and phoxim, could respectively provide 75 7% and 85% control efficiency to Ustilago maydis and Ostrinia Furanncalis if used before tasses
     通过室内筛选和田间试验 ,结果表明 ,稀唑醇为防治玉米瘤黑粉病较好的药剂 ,在玉米心叶末期撒稀唑醇与辛硫磷复配的颗粒剂 ,对玉米瘤黑粉病和玉米螟均有较好的防治效果 ,防效分别为 75 7%和 85 0 %。
短句来源
  相似匹配句对
     DISTRIBUTION PATTERN OF EGG MASSES OF EUROPEAN CORN BORER IN CORN FIELDS AT WHORL STAGE AND ITS PRACTICAL IMPLICATIONS
     玉米玉米螟卵块的分布型及其在实践上的应用
短句来源
     Field plot and single plant tests were conducted at the late centtal-leaf stage to evaluate yield losses of maize induced by the Asiatic corn borer (Ostrinia funacalis) .
     玉米末期,采用田间小区试验和被害单株减产测定,以研究玉米螟害对产量损失的影响。
短句来源
     (3) Excise the leaves at the bottom.
     (3)摘除玉米
短句来源
     Studies on Chemical Constituents of Epimedium brevicornum
     淫羊藿化学成分研究
短句来源
     SIMPLE METHOD FOR ESTIMATING LEAF AREA IN MAIZE
     玉米面积简易测定法
短句来源
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Field plot tests on the control of the European corn borer,Pyrausta nubilalis Hubn.,withgranulated insecticides were carried out at Heng-shui,Ho-pei,during the year 1960-1961.One application of 5% DDT granules at the late whorl stage reduced the earlier borerpopulation about 80-90%,and the insecticides deposited in the leaf axils remained sufficientlyeffective for the control of those larvae hatched after tasselling.The total borer populationbrought under control by a single application was 65-77.4% on corn...

Field plot tests on the control of the European corn borer,Pyrausta nubilalis Hubn.,withgranulated insecticides were carried out at Heng-shui,Ho-pei,during the year 1960-1961.One application of 5% DDT granules at the late whorl stage reduced the earlier borerpopulation about 80-90%,and the insecticides deposited in the leaf axils remained sufficientlyeffective for the control of those larvae hatched after tasselling.The total borer populationbrought under control by a single application was 65-77.4% on corn planted in the spring and60-71.9% on corn planted in the summer.The best time for a single treatment was found tobe late whorl stage,earlier application of granules would be less effective.Double applicationsof insecticides,with the first at the late whorl stage and the second at the silking stage,weremore effective.The borer population on corn planted in spring and summer was reduced85.8-88.6% and 90.6-91:0%,respectively.No significant difference was found between formulations,dosages,and methods of applica-tion.Although the residual toxicity of 5% DDT and 0.5-1.0% γ BHC granules was found tobe well above one month,as the insecticides deposited in the leaf axils lost 85-88% of theiroriginal quantity within the same period,it is concluded that double application might benecessary espeeially when borer population is high.As the relation between amount of egg laying and the effectiveness of insectieidai applica-tion was insignificant,it is suggested that growth stage of corn can be used as the basis fortiming the insecticidal application.

1960—61连续二年在河北衡水施用颗粒剂防治玉米螟:春、夏玉米心叶末期用5% DDT 颗粒剂,不仅前期的螟虫减少了80—90%左右,穗期的螟害也适当地被控制。1次施药能减少整个春玉米生育期的虫数65—77.4%,夏玉米60—71.9%。防治效果似与玉米后期虫口密度有关。心叶期防治以在心叶末期为最理想,提早施药不能获得最高效果。心叶期防治2次与防治1次的效果没有差异。心叶末期与穗期各防治1次,收获时检查,防治效果春玉米上可达85.8—88.6%,夏玉米90.6—91%。因此,在螟害较轻的年分,防治1次即能解决大部分的螟害问题,大发生年分,可以在穗期再防治1次。试验证明不同载体、不同加工方法配制的颗粒剂、不同用量和不同施用方法的防治效果差异都不显著。虽然含5% DDT 或0.5—1%666的颗粒剂的残效能维持1个月以上,但由于田间植株上残存的颗粒剂损失很快,1个月后的残存量仅为12—15%,因此1次防治的效果受到限制。由于防治效果与施药时螟卵发生的情况关系不大,而心叶未期是防治最适时期,因此作者建议可以玉米生育阶段作为施药时期的标准。

Studies on the chemical control of European corn borer, Pyrausta nubilalis Hubner, were carried out in Liaoning province in 1958—1962. Application of 5% DDT granules or 1% γ BHC granules was found to be very effective in combating the borers infesting maize. When applied at the proper time, the above-mentioned insecticides killed 100% of the first generation larvae and reduced the total borer population by 70% and 60% respectively. Grapules could best be applied on the late whorl stage, or on the date 20—25...

Studies on the chemical control of European corn borer, Pyrausta nubilalis Hubner, were carried out in Liaoning province in 1958—1962. Application of 5% DDT granules or 1% γ BHC granules was found to be very effective in combating the borers infesting maize. When applied at the proper time, the above-mentioned insecticides killed 100% of the first generation larvae and reduced the total borer population by 70% and 60% respectively. Grapules could best be applied on the late whorl stage, or on the date 20—25 days after the first appearance of egg mass in the field, or near the end of the oviposition period of the first generation. A single application of granules at late whorl stage was sufficient and an additional application before this period proved to be unnecessary. Insecticides prepared by thoroughly mixing the toxicant with the carrier before making granules were found to be superior to those prepared by merely mixing the toxicant with the granules. Control borers infesting millet with a mixture of 5% DDT dust and 0.5% γ BHC dust on a ratio of 1: 1 was highly effective. The best time to apply insecticide was during the oviposition peak, which generally appeared about 15—20 days after the appearance of the first egg mass in the field. A mortality of 70—80% was expected when the dust was applied to the lower portion of the plants.

1958—1962年在辽宁省新金、辽中及沈阳三地,对为害玉米及谷子的玉米螟进行了化学防治試驗。試驗証明:玉米心叶末期或田間初見卵后20—25天,或田間第一代螟卵接近绝跡时均可作为辽宁地区进行化学防治适期的标准。用5%DDT或1%六六六顆粒剂适期施药,对第一代玉米螟都有100%效果。于玉米收获前剖查,經5%DDT与1%六六六顆粒剂处理后,減虫率分別为70%以上和60%以上。心叶期增加施药次数并不能增加防治效果。从顆粒剂的加工方法来看,混和顆粒剂优于拌粉顆粒剂。谷子上化学防治的适宜时期,为田间初見卵后15—20天,相当于第一代卵高峯或卵高峯后3—5天。用5%DDT、0.5%六六六1∶1混合粉剂,每亩4斤施于谷子茎基部,一次施药,可得70—80%以上的防治效果。

The insect chitin synthesis inhibitors,TH6040,was tested againstthe larvae of the Asiatic corn borer,Ostrinia furnacalis Guenée.Deter-mination in laboratory showed that a mortality of 88-100% of the larvaeresulted when larvae of 1st-3rd instar fed the diet with 3ppm concentra-tions of TH6040.Field plot tests showed that one application of 0.045%TH6040 granules at the late whorl stage on corn planted in the springreduced the number of larvae of 1st generation by 80%. According to our studies,TH6040 has very high...

The insect chitin synthesis inhibitors,TH6040,was tested againstthe larvae of the Asiatic corn borer,Ostrinia furnacalis Guenée.Deter-mination in laboratory showed that a mortality of 88-100% of the larvaeresulted when larvae of 1st-3rd instar fed the diet with 3ppm concentra-tions of TH6040.Field plot tests showed that one application of 0.045%TH6040 granules at the late whorl stage on corn planted in the springreduced the number of larvae of 1st generation by 80%. According to our studies,TH6040 has very high activity and out-standing effect against the corn borer.Thus,the use of TH6040 in theintegrated control of corn borer will be feasible.

本文报道灭幼脲类——TH_(6040)对玉米螟幼虫具有很高的生物活性及显著的防治效果。室内测定证明:玉米螟低龄幼虫在含有3ppm浓度TH_(6040)的人工饲料中取食后,存活率降低88~100%。田间试验证明:在春玉米心叶末期施用一次0.045%TH_(6040)颗粒剂,第一代幼虫存活数量降低80%。由此看出,具有改变昆虫生理功能作用的TH_(6040)可应用于玉米螟的综合防治。

 
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