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幼虫生长发育
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  growth and development of larvae
     Influence of density of food on growth and development of larvae of Nuttallia oliv acea
     饵料密度对紫彩血蛤幼虫生长发育的影响
短句来源
     Effects of rearing density on growth and development of larvae of Tenebrio molitor.
     饲养密度对黄粉虫幼虫生长发育的影响
短句来源
     The results obtained show that the temperature range from 17℃ to 32℃ is suitable for growth and development of larvae and 25℃ to 27℃ is the optimum temperature. The larvae show strong tolerance to hign and low temperatures. The lethal critical temperature is about 40℃.
     缢蛏浮游幼虫生长发育的适温范围为17°—32℃,其中以25°—27℃为最好。
短句来源
     The wider palisade tissue cell was,the better the growth and development of larvae was.
     栅栏组织细胞宽度越大,对幼虫生长发育越有利;
短句来源
  larval growth and development
     EFFECTS OF ALTERING COMPOSITION OF ARTIFICIAL DIETS ON THE LARVAL GROWTH AND DEVELOPMENT OF COCC1NELLA SEPTEMPUNCTATA
     改变人工饲料组分对七星瓢虫幼虫生长发育的影响
短句来源
     EFFECT OF USING RHODOPSEUDOMON AS SP. AS FEED ADDITIVE ON LARVAL GROWTH AND DEVELOPMENT OF CHLAMYS FARRERI
     紫色无硫细菌对栉孔扇贝幼虫生长发育的影响
短句来源
     Effect of Photoperiods on Larval Growth and Development of Dendrolimus punctatus
     马尾松毛虫幼虫生长发育的光周效应
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     EFFECTS OF TEA VARIETIES WITH DIFFERENT TEA PLOYPHENOL CONTENTS ON LARVAL GROWTH AND DEVELOPMENT OF ECTROPIS OBLIQUA PROUT
     不同茶多酚含量的茶树品种对茶尺蠖幼虫生长发育的影响
短句来源
     EFFECTS OF FARNESOL ON THE LARVAL GROWTH AND DEVELOPMENT OF TENEBRIO MOLITOR
     法尼醇对黄粉虫幼虫生长发育的影响
  growth and development of the larvae
     Influence of Different Food on the Growth and Development of the Larvae of Eriogyna pyretorum ( Westwood )
     食物对樟蚕幼虫生长发育的影响
短句来源
     Temperature and humidity are important factors influencing egg hatching and growth and development of the larvae.
     温度和湿度是影响卵孵化及幼虫生长发育的重要因子;
短句来源
     Influences of induced resistance of pine on growth and development of the larvae of pine caterpillar.
     马尾松诱导抗性对马尾松毛虫幼虫生长发育的影响
短句来源
     The effects of altering the composition of oligidic diets and temperature on the growth and development of the larvae of lady beetle Coccindla septempunctata were investigated.
     改变人工饲料的含氮物质和脂类以及温度对七星瓢虫幼虫生长发育有明显影响。
短句来源
     Conclusion Alpha terthienyl is an effective, practicable larvicide which prohibits the growth and development of the larvae of Aedes albopictus .
     结论α 三噻吩是一种高效、实用、并能够抑制蚊幼虫生长发育的杀虫剂。
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  “幼虫生长发育”译为未确定词的双语例句
     The growth inhibiting effect of the alkaloids were high,the growth-inhibitory rate was 26.7% when the concentration was 25 mg/L and 88.79% when the concentration was 100 mg/L.
     浓度为25 mg/L时,雷公藤总生物碱对二化螟幼虫生长发育抑制率为26.72%; 100 mg/L时为88.79%。
短句来源
     Effects of L-Canavanine on the Growth and Development of Plutella xylostella (L)and Antifeeding activity of L-cabavanine on P.xylostella
     L—刀豆氨酸对菜蛾Plutella xylostella(L.)幼虫生长发育及取食的影响
短句来源
     The results show that:queen bee larvae developed better under the condition of relative humidity 90%±2%and temperature 35.5±0.1℃ than the temperature 34.5±0.1℃,and larvae could benefit from fresh pure royal jelly added with alittle honey.
     结果显示:相对湿度为90%±2%,温度为35.5±0.1℃时比34.5±0.1℃时更有利于蜂王幼虫生长发育; 在新鲜的蜂王浆中添加少量蜂蜜,有利于蜂王幼虫生长友育。
短句来源
     Dipping methods and ingestion methods were used and the results showed that the LC_ 50 value of the chemicals against the tested larvae were 0.226 and 0.951g/L at 72 hours after treatment with dipping methods for 5,7,4'-trihydroxyflavone and quercetin, respectively, and 0.062 and 2.420g/L with ingestion methods, respectively.
     结果表明,5,7,4'-三羟基黄酮和槲皮素对菜青虫幼虫生长发育具有明显的影响,浸渍法处理后72h,两种化合物对试虫致死LC50值分别为0.226和0.951g/L; 叶片药膜法处理后72h,LC50值分别为0.062和2.420g/L。
短句来源
     Using double-copy transgenic cotton and F1 hybrids, a series of researches were conducted, which were the resistance, growth and development, nutrition to cotton bollworm, expression of resistant protein, the nitrogen metabolized character and the correlation among them, inherit pattern of resistance, effect of yield and fiber quality in double-copy transgenic cotton and F1 hybrids.
     本文以转Bt+CpTI双价基因抗虫棉品系,以及与常规品种配制的抗虫杂交种为材料,在转基因抗虫棉的棉铃虫抗性时空表达特性、对棉铃虫幼虫生长发育和营养效应的影响、抗虫蛋白的表达与氮代谢关系、抗虫性遗传规律、抗虫基因对棉花产量和纤维品质的影响等方面进行了一系列的研究。
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  growth and development of 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.
      
It was shown that water temperature of 4°C mostly suppressed growth and development of larvae.
      
Normal growth and development of larvae proceeds for 42 days at 17.5° and of pupae for 21 days at 15° C.
      
Effect of zinc on the growth and development of larvae of bay scallopArgopecten Irradians
      
Effect of zinc on growth and development of larvae of the Pacific oyster Crassostrea gigas
      
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  larval growth and development
A temperature of 20°C promoted an enhanced larval growth and development.
      
In turn, anomalies of the mouthparts have an effect on the rate of larval growth and development and on the survival of tadpoles in the period of the metamorphic climax.
      
Effect of different heavy-metal concentrations on Drosophila melanogaster larval growth and development
      
In addition, consumption of E-64 treated potato leaves by CPB larvae at rates as low as 0.8 μg/cm2 of leaf tissue has a deleterious effect on larval growth and development.
      
Fresh foliage of sericea lespedeza with varying levels of tannin did not adversely affect larval growth and development of S.
      
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  growth and development of the larvae
Daily temperature variations by 3-8°C did not markedly affect growth and development of the larvae.
      
The growth and development of the larvae were investigated, and phenolics contents in treated leaves including pyrocatechol, caffeic acid, coumarin, ferulic acid and benzoic acid were also surveyed by high-pressure liquid chromatography (HPLC).
      
The addition of 1.0 mg/ml DEC completely arrested the growth and development of the larvae.
      
In contrast to the indole-type leaf alkaloids, the quinolinetypeCinchona root alkaloids did not affect growth and development of the larvae.
      


Following the report made in 1958, continuous studies were carried on during, 1959--1961in the cotton growing regions of Hupei, Honan, Yunnan and some other provinces. This papermainly deals with the following aspects: geographical distribution of the generations, activities inthe period of late autumn to next spring, different nutritional conditions in relation to develop-ment, selection of host plants by moths, some characteristic habits of adult and larva, some moreimportant factors of outbreak, and some...

Following the report made in 1958, continuous studies were carried on during, 1959--1961in the cotton growing regions of Hupei, Honan, Yunnan and some other provinces. This papermainly deals with the following aspects: geographical distribution of the generations, activities inthe period of late autumn to next spring, different nutritional conditions in relation to develop-ment, selection of host plants by moths, some characteristic habits of adult and larva, some moreimportant factors of outbreak, and some key points of control. The generations produced in different regions may be classified into four belts: 1. Three-generation-belt——localized at 40°N northword; 2. Four-generation-belt——between 32--40°N; 3Five-generation-belt——25—30°N; 4. Six-generation-belt——generally resided at 25°N southword.There are a few instances of seven generations. Of adult and larval development, different results were obtained from different nutritional con- ditions. When larvae fed with the reproductive organs of cotton plant, their growth rate wasfaster, mortality lower and pupal weight also heavier. The food of adult stage is very important to its fecundity. The highest fecundity was foundwhen the moths fed with pollen of cotton flower and 10%. water diluted honey. However, 10—30% cane suger solution was also good. It seems that the moths are highly selective in visiting plants. They visit onions for takingfood from the onion flowers and peas for laying eggs only. The cotton plant is an importanthost for egg laying, but not a favorable food plant for the adult. On the other hand, the sunflower is a good food plant, for adult but not a favorable host for oviposition. There are three main times of adult flight. In the evening, about 19:30—20:30 PM, theadults fly for feeding and oviposition. Mating flight was found at about 1:30—4:00 AM. Atdawn, it was very inactively. Some points of larval habits are needed to mention: The egg hatches mostly at 12:00--18:00PM. The molting period is mostly at night. There is a resting period before molting. The restingperiod of larva becomes longer following its instar increases. The larva always molt outside theboll, and after molting, it usually bores into a new boll to feed which takes place ordinarily at5:30--12:00 AM. The third to sixth instar larvae possess a very large feeding capacity, the averagetotal is about 22.3 squares, flowers and bolls. The basic overwintering pupal population is closely related to the population of first generationin the next spring. The amount of rainfall directly effects the population of various generationsof cotton bollworms. Generally, when the annual amount of rainfall in the Yellow river cottoncultivating region is higher than ordinary year, or when the amount of rainfall in Yangtze riverregion is lower than ordinary year, and the relative humidity of both regions usually keeps around80% which will then very favorable to the cotton bollworms. Storm may wash off and kill theeggs and the young larvae. Due to rainfall in the pupal stage, soil contains too much water whichis unfavorable to the pupae and also to the emergence of moths. According to the various environ-mental conditions, the population of the cotton bollworm in Yellow river region maybe classified into four types: 1. Up grade type——population gradually increases from the firstto the last generation. 2. Down grade type——population decreases in each 3. Midhump type——The highest peak locates in the middle generation. 4. Saddle type——The population of the middlereaches the lowest and much higher at both ends. Besides the chemical control, some other aspects are considered more important in checkingthe population of cotton bollworms. They are the elimination of overwintering pupae by meansof various methods, the destruction of honey producing flower plants in spring in order to elimi-nate the food sources of adults, the attraction of moths by means of different kinds of light andalso the tree stick bundle method, etc.

继续1958年棉铃虫研究工作报告之后,1959—1960年又进一步在湖北、河南和云南等省作了研究,本文主要包括棉铃虫的世代分布带,晚秋、冬春活动情况,不同饲料对生长发育的影响,成虫对寄主植物的选择,成虫和幼虫活动的规律性,大发生的特点和防治关键。 其发生世代大致可分四个地理带:1.40°N以北,约发生3代;2.32-40°N是4代区;3.25-32°N是5代区;4.25°N以南一般6代,个别地区7代。如化蛹后5天以上其眼域外缘的4个小斑点没有变化,即为休眠蛹。 不同食料条件对成虫和幼虫生长发育影响很大。幼虫取食植物的繁殖器官,营养良好,则死亡率低、生长快、蛹较重、成虫繁殖力也高。成虫补充营养不同,其产卵量有显著差异,喂以棉花花粉加10%蜂蜜水产卵最高,单喂10—30%蔗糖水也很好,蔗糖太浓或单喂各种花产卵都降低,喂以植物营养器官则产卵很少或不产卵。 成虫对不同寄主植物有选择性。可分为取食寄主、产卵寄主、取食兼产卵寄主。如大葱、洋葱等则仅取食而不产卵;而豌豆等是产卵寄主,未见成虫取食;棉花等以产卵为主;向日葵等则以取食为主,产卵较少。成虫产卵对棉株生长势也有选择,一般棉株生长茂盛,颜色浓绿、组织幼嫩...

继续1958年棉铃虫研究工作报告之后,1959—1960年又进一步在湖北、河南和云南等省作了研究,本文主要包括棉铃虫的世代分布带,晚秋、冬春活动情况,不同饲料对生长发育的影响,成虫对寄主植物的选择,成虫和幼虫活动的规律性,大发生的特点和防治关键。 其发生世代大致可分四个地理带:1.40°N以北,约发生3代;2.32-40°N是4代区;3.25-32°N是5代区;4.25°N以南一般6代,个别地区7代。如化蛹后5天以上其眼域外缘的4个小斑点没有变化,即为休眠蛹。 不同食料条件对成虫和幼虫生长发育影响很大。幼虫取食植物的繁殖器官,营养良好,则死亡率低、生长快、蛹较重、成虫繁殖力也高。成虫补充营养不同,其产卵量有显著差异,喂以棉花花粉加10%蜂蜜水产卵最高,单喂10—30%蔗糖水也很好,蔗糖太浓或单喂各种花产卵都降低,喂以植物营养器官则产卵很少或不产卵。 成虫对不同寄主植物有选择性。可分为取食寄主、产卵寄主、取食兼产卵寄主。如大葱、洋葱等则仅取食而不产卵;而豌豆等是产卵寄主,未见成虫取食;棉花等以产卵为主;向日葵等则以取食为主,产卵较少。成虫产卵对棉株生长势也有选择,一般棉株生长茂盛,颜色浓绿、组织幼嫩、蕾、花和嫩叶多则产卵多,反之则少。 成虫昼夜活动有一定规律性,从飞翔看来,可分为三个主要阶段:黄

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...

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 hemocytes of Pseudaletia separata have been examined in wet spread prepara-tions of unfixed hemolymph throughout its larval life. A phase-contrast microscope wasused to observe the blood films and to make photographs. Seven basic types of hemocytes have been distinguished. These are prohemocyte,plasmatocyte, spherule cell, granular cell, spheroidocyte, podocyte and oenocytoid. Amongthese, the prohemocytes are the only hemocytes which undergo mitosis. The spherulecells and oenocytoids undergo marked alteration...

The hemocytes of Pseudaletia separata have been examined in wet spread prepara-tions of unfixed hemolymph throughout its larval life. A phase-contrast microscope wasused to observe the blood films and to make photographs. Seven basic types of hemocytes have been distinguished. These are prohemocyte,plasmatocyte, spherule cell, granular cell, spheroidocyte, podocyte and oenocytoid. Amongthese, the prohemocytes are the only hemocytes which undergo mitosis. The spherulecells and oenocytoids undergo marked alteration in appearance during the larval life, theplasmatocytes are of a hemocyte category actively participating in phagocytosis. The alteration of the hemocyte population in each instar has been examined at thesame time. The results indicated that larvae just hatching out from eggs and beforefeeding have only the prohemocytes in their hemolymph. Before third instar the fre-quency of prohemocytes are most numerous, and after which it decreased gradually, atthe prepupal stage no prohemocytes are present. The frequency of plasmatocytes in eachinstar is variable relative to an individual stage of development. They tend to decreascprior to each ecdysis, and increase afterwards. The spherule cells in each instar arenumerous and vary greatly (about 5—85%), but the oenocytoids vary less (about 5-18%). The other types of hemocytes such as granular cells, spheroidocytes and podo-cytes occurred in the later instars and have a low frequency.

本文以粘虫为对象将各龄幼虫分为白头期、进食期和蜕皮前期,对其血细胞以相差显微镜进行了系统观察。粘虫幼虫血细胞的基本类型可区别为:原始血细胞、浆细胞、小球细胞、颗粒细胞、类球形细胞、伪足细胞及类绛色细胞七类。类绛色细胞及小球细胞在发育过程中有明显的形态转变现象,其中仅浆细胞有吞噬作用。上述各种血细胞的发生动态是与幼虫的生长发育密切联系的。

 
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