助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   diapause 在 植物保护 分类中 的翻译结果: 查询用时:0.167秒
图标索引 在分类学科中查询
所有学科
植物保护
生物学
农业基础科学
蚕蜂与野生动物保护
林业
基础医学
园艺
临床医学
预防医学与卫生学
更多类别查询

图标索引 历史查询
 

diapause
相关语句
  滞育
    Diapause Mechanism and Application of Chrysoperla sinica(Tjeder)
    中华通草蛉的滞育机制和应用研究
短句来源
    Study on the Diapause During larvae Stage of the Rice-plant Looper, Plusia festucae L.——Ⅰ. DIAPAUSE INDUCTION AND DIAPAUSE PROCEDURE
    金斑夜蛾Plusia festucae L.幼虫滞育的研究 Ⅰ.滞育的诱导及经过
短句来源
    A Study on the Photoperiodic Diapause of Dendrolimus spp.
    松毛虫光周滞育的研究
短句来源
    PROGRESS IN STUDYING LEAF MITES DIAPAUSE
    叶螨滞育的研究进展
短句来源
    A STUDY ON THE COLD-RESISTANCE AND DIAPAUSE IN TETRADACUS CITRI CHEN
    柑桔大实蝇(Tetradacus citri Chen)耐寒及滞育性研究
短句来源
更多       
  “diapause”译为未确定词的双语例句
    cDNA Cloning and Sequence Analysis of the Diapause Hormone in Helicoverpa Assulta Guenée
    烟夜蛾(Helicoverpa assulta Guenée)滞育激素cDNA的克隆和序列分析
短句来源
    The Timal and Spacial Expressione of the Diapause Hormone Gene in Helicoverpa Assulta Guenée
    烟夜蛾(Helicoverpa assulta Guenée)滞育激素基因的时空表达
短句来源
    at 13.8℃ the larval active stage lasts 2.18(±0.51)days, the life-span of male adult is 2.89(±0.77) days, at 18.4℃, the larval diapause stage lasts 14.28(±1.7) days for female and 12.18 (±1.73) days for male;
    13.8℃时,幼螨活动期为2.18(±0.51)天,雄成螨寿命为2.89(±0.77)天; 13.4℃时,幼螨休眠期,雌性为14.28(±1.7)天,雄性为12.18(±1.73)天;
短句来源
    High temperature could terminate diapause with a development threshold of 16. 52℃ and effective accumulated temperature of 358. 53 degree-day.
    发育起点温度为16.52℃,有效积温为358.53日度。
短句来源
    The developmental threshold and effective accumulated temperature of diapause pupae vernalized by low temperature were 17. 63℃ and 135. 56 degree-day, respectively.
    经低温完全活化的个体,其蛹期的发育起点温度为17.64℃,有效积温为135.56日度。
短句来源
更多       
查询“diapause”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  diapause
This can be significant for their survival in post-diapause.
      
Role of diapause in coexistence of zooplankton species: Model analysis
      
Activity of Embryonic Mink Genome during Diapause (Cytogenetic Analysis): Nucleolar and Extranucleolar RNA Synthesis
      
The nucleolar and extranucleolar RNA synthesis was studied in the mink blastocysts at different stages of embryonic diapause and during the periimplantation period using cytoradioautography.
      
These data suggest that the occurrence of an obligate diapause in ontogenesis of certain animal species is related not only to the delay in implantation, but also to the alteration in the chronology of all processes of embryogenesis.
      
更多          


1. The percentage of diapause under field conditions. The peach fruit borer, Carposina niponensis Walsingham, has a complete firstgeneration and a partial second generation annually in Liaoning province, the majorapple-growing district in China. It passes the winter as full-grown larva encased in athick, elliptical cocoon under ground. A record of two years'(1956--1957) observation in Hsiung-yao (40°10′N) on theoccurrence of diapause is shown in table 1. The data show that the later the larvaeemerged...

1. The percentage of diapause under field conditions. The peach fruit borer, Carposina niponensis Walsingham, has a complete firstgeneration and a partial second generation annually in Liaoning province, the majorapple-growing district in China. It passes the winter as full-grown larva encased in athick, elliptical cocoon under ground. A record of two years'(1956--1957) observation in Hsiung-yao (40°10′N) on theoccurrence of diapause is shown in table 1. The data show that the later the larvaeemerged from the fruits, the greater the proportion of the larvae entering diapause.Larvae that emerged before July 21 never entered diapause; of those that emerged fromJuly 26 to August 16 not over 20 per cent had gone into diapause; those that emergedfrom August 16 to August 20 had a diapause rate increasing sharply up to 80 per cent;and those that emerged in end of August all entered diapause. 2. Effect of the length of daily photoperiod on the induction of diapause. The influence of the photoperiod on the induction of diapause is dominant at me-dium temperatures. Almost 100 per cent of the larvae grown at medium temperatures(25°and 27℃.), with 13 hours illumination per day, entered diapause; but only a smallproportion of the larvae grown at the same temperature, with 15 hours illumination perday, entered diapause (usually not over 10 per cent). Table 2 shows that most of the larvae grown under complete darkness entered dia-pause. The only exception to this is the result concerning larvae of the first generationat 27℃. The same table shows that as the photoperiod increased from 15 hours up to 17 and24 hours per day, the percentage of the larvae entering diapause increased accordingly. From the results shown in table 2, it is apparent that the critical photoperiod liesbetween 13 and 15 hours of illumination per day. 3. The effect of temperature on diapause. For the larvae grown in complete darkness, the effect of temperature in inducingdiapause is shown in table 3. Experimental data show that when the larvae were heldat 15°, 18°, 21°, 23° and 25℃., almost 100 per cent of them entered diapause; whenthe temperature was over 25℃., the proportion entering diapause decreased sharply; andunder 34℃., the percentage of diapause dropped to 9 per cent. On the other hand,when the larvae were held at 12℃., about one third of them would not enter diapause.Experimental data again show that the effect of the duration of illumination per day on the induction of diapause of the larvae which were held at low temperatures (18°to 22℃.) were practically the same as at medium temperatures (25° and 27℃.). 4. The relationship between the length of photoperiod and diapause undernatural conditions. According to an analysis of the relationship between the change of day length whichoccurred in the larval growth season of the first-generation and the proportion of larvaeentering diapause at different dates, it is concluded that under natural conditions, thelength of day plays a dominant role in determining which individuals of the full fedlarvae will enter diapause. The average atmospheric temperature was 23℃. at thattime (Table 5); and it seemed to have no effect on the induction of diapause. Thecritical photoperiod for the induction of diapause in natural conditions will be 14:50 to14:13 hours of light per day (Table 6). Figure 3 shows the change of day length (hours) and date of critical photoperiodin the first-generation larval growth season at Hsiung-yao. Owing to the fact that theincidence of diapause in the first-generation was markedly influenced by the timing ofthe light-sensitive larval stage in relation to the critical date, figure 3 also illustratesa comparison between the first-generation oviposition periods of three different years.In the year 1956, nearly all the first-generation eggs were deposited before the criticalphotoperiod date, probably only a small proportion of the first-generation larvae enteringdiapause. Accordingly, a greater number of the second-generation eggs were laid whencompared with the first-generation (1:

桃小食心虫在辽南苹果产区为二化性兼性滞育害虫。据在熊岳的观察,第一代幼虫通常于7月下旬开始脱果,凡脱果日期愈晚的幼虫,进入滞育的百分率愈高。在中间温度下,滞育的发生决定于幼虫发育期间昼夜光照时数:在每日光照13小时下发育时,全部滞育,在15小时下发育的,基本不滞育。根据田间第一代幼虫发育期间温度和日照时数的变化与幼虫滞育百分率进度的关系推算结果,第一代幼虫发生期间的温度是在光周期反应的适温范围内,故温度不是引起滞育的主要因素。推算出来的临界光周期位于14小时50分—14小时13分之间(在熊岳出现该光周期的日期为7月21号左右)。最后,讨论了田间第一代幼虫发生期早晚与滞育百分率及第二代发生量的关系:在春季干旱的年份(如1955、1957),由于第一代幼虫发生期被推迟,滞育百分率提高,从而减少了当年第二代的发生量;相反,在第一代幼虫发生期较正常年份提前的1956年,该代的滞育百分率降低,从而相应增加了第二代的发生量。

From the standpoint of the ecological characteristics of the cotton pinkbollworm,concerning the different stages in development in relation with thetemperature and the relative humidity,the influence of food for the larvaldevelopment and the diapause of the larvae,the type of development is discussedin this report.It is a part of results of the pink bollworm investigation during1950 to 1962.With the exception of a few localities in the Northwest,pink bollworm hasbeen found in every cotton-cultivated area...

From the standpoint of the ecological characteristics of the cotton pinkbollworm,concerning the different stages in development in relation with thetemperature and the relative humidity,the influence of food for the larvaldevelopment and the diapause of the larvae,the type of development is discussedin this report.It is a part of results of the pink bollworm investigation during1950 to 1962.With the exception of a few localities in the Northwest,pink bollworm hasbeen found in every cotton-cultivated area in China.The distribution of the pinkbollworm in the Northwest is limited by the low temperature in winter and thetemperature-humidity condition in cotton-growing season.According to theduration of the effective reproductive period of the pink bollworm in differentregions,it can be divided into four types in the infested areas in this country:1,two-generation area(effective reproductive period 70 days);2,two to three-generation area(effective reproductive period 80-100 days);3,three to four-generation area(effective reproductive period 120-140 days),and 4,multi-genera-tion area(effective reproductive period more than 240 days).If the moths developed were under certain limited number,no seriousdamage could be caused even after the third generation;if only a few squaresappeared during the time of moth emergency,the damage caused by the firstgeneration larvae would be quite limited.After the appearance of the cottonbolls,the larvae were densely populated not in squares but in bolls when bothbolls and squares were present.Since the cotton bolls are the most preferablefood for the pink bollworm,their presence is possibly responsible for the suddenrise of the larval population during that time.During the period of the secondgeneration,dry weather causes a great decrease in the larval population.Based upon the results of this study,different measures can be taken to con-trol the pink bollworm in the different types of the infested areas as mentionedabove.

本文系根据1950—1962年的部分研究结果。从红铃虫各期虫态发育与温湿度关系、食料对幼虫生长发育的影响、以及幼虫滞育的一些有关生态特性,来探讨它的发生规律。根据分析:西北无虫区的原因,主要是受冬季低温强度大,夏季温差大,湿度低的限制,红铃虫既不能越冬,又不能繁殖;已感染的地区,根据红铃虫的有效繁殖日数,可以划分为四个世代类型:即二代区、二三代区、三四代区和多代区。关于红铃虫数量变动原因,与发生基数、气候条件和繁殖期的食料条件关系最为明显。与此同时,也指出了不同地区控制红铃虫种羣数量的途径。

The present investigation was made in the course of three years (1961—1963). Thirty-two plots,each of 2—3 mou,in Pinus massoniana stands were selected for esti- mating the fluctuation of population of this serious pest.The estimations comprised of several items,such as sex ratio,fecundity,mortality and others. Based on the results of observations,it was found that in the hilly areas of Kiangsf Province,the outbreak of this pest seemed to be of intermittent epidemic type.The out- break intensity,as measured by...

The present investigation was made in the course of three years (1961—1963). Thirty-two plots,each of 2—3 mou,in Pinus massoniana stands were selected for esti- mating the fluctuation of population of this serious pest.The estimations comprised of several items,such as sex ratio,fecundity,mortality and others. Based on the results of observations,it was found that in the hilly areas of Kiangsf Province,the outbreak of this pest seemed to be of intermittent epidemic type.The out- break intensity,as measured by the number of generations between two successive out- breaks,varied from 2 to 3 or more generations. The population clensity varied from generation to generation. As a rule, the first generation had the highest population density, and the overwintering generation the low- est. The population density of each generation was mainly decided by the mortality of the first three instar larvae. No close relationship between populations of two successive generations was found. In those areas where there were 2—3 generations a year,the larvae of the second generation when developing to fourth instar,differentiated into two groups.The larvae of the one group went into diapause right away and those of the other continued to de- velop and overwintered as 3rd instar larva in the third generation.The number of larvae in each of the two groups varied with environmental conditions.The ecological significance of this phenomenon should be studied further.But based on the results of examinations,it was found that this phenomenon exerted no influence on the population change of the overwintering generation. Besides the human effect,there were three factors affecting the population changes, namely the climatic,food and natural enemy factors.The effect of climate on popula- tion fluctuation was found to have been greater than that of the food or of the enemies. In Kweichi,Kiangsi,the precipitation in May and in August exerted a decisive effect on the occurrence of outbreak in a year.The food factor affected the population change only in certain localities where the pine needles were completely consummed by this pest. The natural enemies exercised a great effect on the population immediately after the collapse of the outbreak. The number of generations completed in one year varied from the south to the north.There were 3—4 generations in Canton,Kwantung Province,while in Hsinyang, Honan Province only 2—3 generations a year.The highest fecundity was 881 eggs per female with an average of 681.5 eggs.But in general,a female laid only 200—300 eggs.

本文根据几年来研究结果,就马尾松毛虫发生动态进行初步分析,以便了解其一定规律,而为测报及防治提供依据。本种害虫发生时期虽因地而异,但在同一地区,其各虫态各年中发生期的变幅,并不算大。根据发生危害情况,可将本种害虫发生地区分为三类,即(1)深山安全地区,(2)浅山偶发地区,及(3)丘陵猖獗地区。把发生地区按照这一情况划分,对防治本种害虫,颇有实际意义。本种害虫种群数量季节变动,有其一定规律性。一年中第四龄幼虫发生数量以第一代最多,第二代灰之,越冬代最少。各世代数量的多少,对于其下一代数量的变动,并无显明的相关性存在,下一代数量多少,主要以其1一3龄幼虫死亡率大小为转移,死亡率小,下一代数量多,反之则少,由此可知当代第四龄幼虫数量是决定各该代数量多少的比较可靠的依据。越冬代数量多少,对于次年春季越冬代大发生有决定性作用,因一般越冬死亡率不大。预测发生数量,对上述事实,必须加以重视。影响马尾松毛虫发生的因素,主要有气候、食料及天敌,而以气候影响范围较大,食料及天敌则只有在局部地区起作用。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关diapause的内容
在知识搜索中查有关diapause的内容
在数字搜索中查有关diapause的内容
在概念知识元中查有关diapause的内容
在学术趋势中查有关diapause的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社