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caterpillar
相关语句
  毛虫
    STUDY ON THE AERIAL APPLICATION OF SPRAYING 20% COLLOIDAL SUSPENSION OF DIMILIN AGAINST TENT CATERPILLAR AND PINE CATERPILLAR
    飞机喷洒20%灭幼脲Ⅰ号胶悬剂防治松毛虫和天幕毛虫的研究
短句来源
    BIOASSAY OF JDS-CPV ON THE PINE CATERPILLAR DENDROLIMUS PUNCTATUS
    日本赤松毛虫质型多角体病毒Dendrolimus Spectabilis CPV对马尾松毛虫的生物测定
短句来源
    Bioassay of JDS-CPV was conducted on the 3rd instar and 5th instar larvae of pine caterpillar D. punctatus.
    应用日本赤松毛虫质型多角体病毒(以下简称JDS-CPV)对马尾松毛虫第一代3龄和5龄幼虫进行了生物测定。
短句来源
    BIOLOGY OF THE OAK CATERPILLAR Cyclophragma undans (Walker)
    波纹杂毛虫生物学特性的研究
短句来源
    STUDIES ON A NUCLEAR POLYHEDROSIS VIRUS OF OAK CATERPILLAR AND ITS NUCLEAR ACID-DNA
    波纹杂毛虫核多角体病毒的研究
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  “caterpillar”译为未确定词的双语例句
    STUDIES ON THE CONTROL OF THE PINE CATERPILLAR (DENDROLIMUS PUNCTATUS,WALKER)BY APPLYING DDT ON THE TRUNK
    树干涂刷DDT防治松毛虫(Dendrolimus punctatus Walker)研究
短句来源
    STUDIES ON THE POPULATION DYNAMICS OF THE PINE CATERPILLAR(DENDROLIMUS PUNCTATUS WALKER)IN CHINA
    马尾松毛虫(Dendrolimus punctatus Walker)发生动态的研究
短句来源
    SPATIAL DISTRIBUTION PATTERNS OF THE PINE CATERPILLAR(DENDROLIMUS PUNCTATUS WALKER)AND ITS APPLICATION IN PRACTICE
    马尾松毛虫(Dendrolimus punctatus Walker)的空间分布型及其在实践上的应用
短句来源
    Dynamic Prediction of Pine Caterpillar Community
    马尾松毛虫种群动态预测
短句来源
    A Study on the Cluster Behaviours of Tea Caterpillar (Euproctis pseudoconspersa Strand)
    茶毛虫Euproctis pseudoconspersa Strand群聚行为研究
短句来源
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  caterpillar
Effect of damaged pine needles on growth and development of pine caterpillar larvae
      
Chinese pine caterpillar (Dendrolimus tabulaeformis) larvae were fed with pine needles of different degrees of damage to evaluate the effects of pine needles on the growth and development of larvae.
      
The lowest amount of food ingested and voided feces, the lowest nutritional index, slowest development, lightest pupae and most mortality were found in those pine caterpillar larvae fed with pine needles which were 50% damaged.
      
Control of motion of an actively caterpillar-bending body
      
Hydrodynamic characteristics of air-supported caterpillar tracks
      
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The pine caterpiller,Dendrolimus punctatus Walker, has the habit of leav-ing the crown part of a tree and hibernating under the loose bark of thetrunk. The present paper reports the successful control of this pest by treatinga part of the trunk with a DDT suspension. All experiments were carried outat Nanking, 1947-48. When solutions and water suspension containing 5% DDT, 1%γ 666,or 5% 1068 were applied with a brush to the trunk for a width of one footand over-wintering larvae were allowed to crawl over the...

The pine caterpiller,Dendrolimus punctatus Walker, has the habit of leav-ing the crown part of a tree and hibernating under the loose bark of thetrunk. The present paper reports the successful control of this pest by treatinga part of the trunk with a DDT suspension. All experiments were carried outat Nanking, 1947-48. When solutions and water suspension containing 5% DDT, 1%γ 666,or 5% 1068 were applied with a brush to the trunk for a width of one footand over-wintering larvae were allowed to crawl over the treated area, all theinsecticides tested were found to be effective when freshly applied. After oneweek, how-ever, only preparations containing DDT remained effective. DDTwater suspension was markedly better than DDT in kerosene, soybean oil, oracetone. Trees treated with a 5% DDT water suspension were still very toxic tothe caterpillars at the end of six weeks. The number of caterpillars crawling over a DDT-treated area would notinfluence the toxicity of the DDT film under practical field conditions. In oneexperiment all area of twenty inches square, treated with a 5% DDT suspension,still showed high toxicity to the caterpillars after 1,800 larvae had crawled overthe area in a period of nine days. Caterpillars were found to be more resistant to DDT in summer than inwinter. By increasing either the concentration of DDT to 10-15% or thewidth of the treated area to 2-3 feet, the "trunk treatment method" could beused as well in summer, if the caterpillars were beaten down to the grounedafter the trees had been treated with DDT. Under the field conditions in Nanking, 1947-48, the pine caterpilIars beganto leave the crown part of the trees and seek hibenation quarters in November.They became active again early in March, hence tree should he treated withDDT not later than the dates mentioned above. A total of 157,658 trees were treated with DDT on the Purple Mountain,Nanking, 1948. Examinations showed that larval population decreased 90-99%in the treated area, while in the check area an increase in population of16-350% had been observed.

本文研究在松树干上涂刷有持久性的药剂以防治越冬松毛虫的可能性。1947—48年在南京试验及实施防治的结果简述如下: (一)在实验室内使越冬松毛虫爬行越过涂有一市尺宽各种药液的松树干的结果,证明5% DDT,1%γ666,与5% 1068的悬液或溶液。在涂药的当天均 有相当高的杀虫效力,惟一周以后γ666与1068完全失效,仅DDT仍保持强大的毒力。DDT水悬液显著较DDT火油、大豆油或丙酮溶液为佳。涂有5%DDT悬液的松树杆曝露田间六星期后,杀死松毛虫能力仍达100%。 (二)据试验的结果,自制的可湿性DDT,内含DDT50%,稀释剂45%,与肥皂5%,尚适宜于防治松毛虫之用。 (三)松毛虫爬行的次数对涂药面积上DDT毒力的影响极微,在二十平方市寸涂有5% DDT悬液的小面积上,9天之内经过1800头松毛虫爬行后,毒力仍未减小,死亡率尚在90%以上。 (四)夏季松毛虫较越冬松毛虫不易杀死。夏季松毛虫抵抗DDT的能力随龄期而增强。试验中显示如增加药液浓度至含DDT 10—15%,或增加涂药的宽度至2—3市尺,夏季幼虫亦能中毒死亡。故树干涂药法亦可应用在夏季防治上,惟必须在涂药后将松毛虫从树上击落,使其在爬返树冠...

本文研究在松树干上涂刷有持久性的药剂以防治越冬松毛虫的可能性。1947—48年在南京试验及实施防治的结果简述如下: (一)在实验室内使越冬松毛虫爬行越过涂有一市尺宽各种药液的松树干的结果,证明5% DDT,1%γ666,与5% 1068的悬液或溶液。在涂药的当天均 有相当高的杀虫效力,惟一周以后γ666与1068完全失效,仅DDT仍保持强大的毒力。DDT水悬液显著较DDT火油、大豆油或丙酮溶液为佳。涂有5%DDT悬液的松树杆曝露田间六星期后,杀死松毛虫能力仍达100%。 (二)据试验的结果,自制的可湿性DDT,内含DDT50%,稀释剂45%,与肥皂5%,尚适宜于防治松毛虫之用。 (三)松毛虫爬行的次数对涂药面积上DDT毒力的影响极微,在二十平方市寸涂有5% DDT悬液的小面积上,9天之内经过1800头松毛虫爬行后,毒力仍未减小,死亡率尚在90%以上。 (四)夏季松毛虫较越冬松毛虫不易杀死。夏季松毛虫抵抗DDT的能力随龄期而增强。试验中显示如增加药液浓度至含DDT 10—15%,或增加涂药的宽度至2—3市尺,夏季幼虫亦能中毒死亡。故树干涂药法亦可应用在夏季防治上,惟必须在涂药后将松毛虫从树上击落,使其在爬返树冠时接触药剂而死亡。 (五)自然情形下,南京松毛虫在十一月即开始下树越冬,至来年三月初开始活动上树,故采用树干涂药法防治下?

Recent works of many authors show that temperature has an important effect on themortality due to insecticides. But different effects have been reported in different cases.During 1959-1960, we had the occasion to carry out some experiments on the effect ofDDT, BHC and Dipterex applied to the hibernating larvae of the pine caterpillar, theresults of which may be summarized as follows: According to field observations, we may divide the larval hibernation into five suc-cessive periods during the winter: 1)...

Recent works of many authors show that temperature has an important effect on themortality due to insecticides. But different effects have been reported in different cases.During 1959-1960, we had the occasion to carry out some experiments on the effect ofDDT, BHC and Dipterex applied to the hibernating larvae of the pine caterpillar, theresults of which may be summarized as follows: According to field observations, we may divide the larval hibernation into five suc-cessive periods during the winter: 1) Active period before pre-hibernation; 2) Pre-hibernation period; 3) Hibernation period; 4) Post-hibernation period; and 5) Ac-tive period after post--hibernation. In the case of DDT, the finding in general is that there is a higher mortality at lowertemperature (between 10-20℃ mean daily temperature). But in the case of BHC andDipterex the mortality is increased at higher temperatures (when over 20℃). Theeffect is more evident in the latter case. The effects of insecticides are different at different periods of hibernating larvae. Incase of DDT the order is: Post-hibernation period > Pre-hibernation period > Hibernation period > Activeperiod before pre-hibernation > Active period after Post-hibernation ≥ Summer larvae(4-5th instars).

1959—1960年作者等在江西、湖南等地区配合大面积防治森林害虫之际,开展了DDT等化学药剂对于不同越冬时期的马尾松毛虫幼虫的毒效试验。据野外观察结果,将马尾松毛虫越冬幼虫划分为5个时期。即越冬前活动期、越冬前期、越冬期、越冬后期、越冬后活动期。试验证明:不同化学药剂对越冬松毛虫幼虫的毒效随着不同时期和温度条件而变化。就一般论:DDT的效果,在比较低温(日均温10—20℃)时特别显著;666及敌百虫的效果,在比较高温时(20℃以上)为显著。其中尤以敌百虫为更甚。DDT对不同时期幼虫的毒效大小为:越冬后期>越冬前期>越冬期>越冬前活动期>越冬后活动期≥夏季(4-5龄)幼虫;其中以越冬后期幼虫抵抗力最弱。从原则上论这是施药的最适宜时期,从25% DDT乳剂4,000倍稀释液在越冬后期(2,3月间)施用,毒效可达92%以上,用6,000倍稀释液亦达82%以上。如用γ6%可湿性666,800倍稀释液在越冬前、后期使用,毒效可达70-80%以上。50%敌百虫乳剂在温度20℃以上时(越冬前、后活动期)毒效显著增高。此时如用5,000-6,000倍稀释液喷洒,毒效可达70-80%左右。由此,作者认为:在长江以北,每年发生...

1959—1960年作者等在江西、湖南等地区配合大面积防治森林害虫之际,开展了DDT等化学药剂对于不同越冬时期的马尾松毛虫幼虫的毒效试验。据野外观察结果,将马尾松毛虫越冬幼虫划分为5个时期。即越冬前活动期、越冬前期、越冬期、越冬后期、越冬后活动期。试验证明:不同化学药剂对越冬松毛虫幼虫的毒效随着不同时期和温度条件而变化。就一般论:DDT的效果,在比较低温(日均温10—20℃)时特别显著;666及敌百虫的效果,在比较高温时(20℃以上)为显著。其中尤以敌百虫为更甚。DDT对不同时期幼虫的毒效大小为:越冬后期>越冬前期>越冬期>越冬前活动期>越冬后活动期≥夏季(4-5龄)幼虫;其中以越冬后期幼虫抵抗力最弱。从原则上论这是施药的最适宜时期,从25% DDT乳剂4,000倍稀释液在越冬后期(2,3月间)施用,毒效可达92%以上,用6,000倍稀释液亦达82%以上。如用γ6%可湿性666,800倍稀释液在越冬前、后期使用,毒效可达70-80%以上。50%敌百虫乳剂在温度20℃以上时(越冬前、后活动期)毒效显著增高。此时如用5,000-6,000倍稀释液喷洒,毒效可达70-80%左右。由此,作者认为:在长江以北,每年发生2代以下的松毛虫地区,可用DDT和666稀释液在越冬前、后期进行防治。长江以南,每年发生2代以上的马尾松毛虫地区,不但可用DDT、

The pine caterpillar is one of the most important pests of pine trees in China. Be-cause there are some disadvantages to apply chemical control of this pest, an urgentneed of using microbial methods as a supplementary measure is evident. The results ofthe preliminary test are very promising. The results are as follows: 1. The application of B. thuringiensis var. thuringiensis to control the pine cater-pillar seems to be very effective. In future it may develop into a new and powerfulweapon in pest control...

The pine caterpillar is one of the most important pests of pine trees in China. Be-cause there are some disadvantages to apply chemical control of this pest, an urgentneed of using microbial methods as a supplementary measure is evident. The results ofthe preliminary test are very promising. The results are as follows: 1. The application of B. thuringiensis var. thuringiensis to control the pine cater-pillar seems to be very effective. In future it may develop into a new and powerfulweapon in pest control work. 2. The concentrations of the bacterial suspensions should be raised with the in-crease of larval instars. The range is approximately between 15×10~6--2.7×10~8 sporesper c.c. 3. High temperature resulted in a quick infection and death of the larvae. There-fore, the application of this method in June, July and August will give better results,though in cold and wet seasons, for example in March and April in central China, thecontrol is also effective. 4. The applications of B. thuringiensis var. thuringiensis with very dilute concentra-tions of chemical insecticides, such as 666, DDT and Diptrex, will give quicker andbetter results. This is a promising method. Dusting is valuelessly.

本文系应用苏云金杆菌(Bacillus thuringiensis var.thuringiensis)粉制剂防治马尾松毛虫(Dendrolimus Punctatus Walk.)的试验结果,试验表明此菌的致病力高,防治效果好,大有应用的前途。应用时,菌剂的浓度应随幼虫龄期的增加而递增,含孢子数的有效幅度为1,500-27,000万/c.c.死亡率可达90-100%。此菌如与稀浓度化学药剂(如666、DDT、敌百虫)混合使用,防治抵抗力较强的4-7龄幼虫,效果更好。

 
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