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   幼虫生长 在 植物保护 分类中 的翻译结果: 查询用时:0.671秒
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幼虫生长
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  larval growth
    At 20mg/kg, the larval growth were remarkably suppressed by C 19 ,C 26 ,C 28 , the inhibition of C 28 was close to toosendanin in 48 h.
    在 2 0mg kg浓度 ,生长发育实验表明C19、C2 6、C2 8具有较好的抑制幼虫生长作用 ,其中C2 8的作用与川楝素相当 ;
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
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    EFFECTS OF FIVE NEW COMPOUNDS ON THE LARVAL GROWTH AND DIGESTIVE PHYSIOLOGY OF THE ASIATIC CORN BORER, OSTRINIA FURNACALIS LARVAE
    五种新化合物对亚洲玉米螟幼虫生长发育和消化生理的影响(英文)
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  “幼虫生长”译为未确定词的双语例句
    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
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    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
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    Effect of Cry1C toxin from Bacillus thuringiensis on growth , survival and feeding behavior of beet army worm larva Journal of Zhejiang Agricultural University
    苏云金杆菌Cry1C毒素对甜菜夜蛾幼虫生长发育、存活及取食行为的影响
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    Influence of API-transgenic cotton plants on growth and midgut proteases activity to Helicoverpa armigera larvae
    转基因棉对棉铃虫幼虫生长及中肠蛋白酶活性的影响
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    Effects of a plant activator protein on the growth and development of beet armyworm larvae
    植物激活蛋白对甜菜夜蛾幼虫生长和发育的影响
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  larval growth
Considerable differences were found in salinity tolerance of adult periwinkles, larval growth and survival, and morphology of the egg capsules.
      
A temperature of 20°C promoted an enhanced larval growth and development.
      
Though a temperature of 20°C caused enhanced larval growth, the temperature was not optimal, while its effect caused quality diversity of larval development, owing to the difference in their growth rates.
      
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.
      
None antiparasitic effect of ABCD on larval growth was determined.
      
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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。

Laboratory tests were carried out to study the artificial diets for the larvaeand adults of the green lacewing,Chrysopa sinica T.The following diets wereused:Larval diet:Fresh egg 40gBrewer's yeast 30gHoney 20gCane sugar 10gAscorbic acid 0.1gwater 100mlAdult diet:Porcine liver powder 10gBrewer's yeast 10gWater 100mlTen successive generations have been reared on these diets.The average rateof cocooning and adult emergence was 58.3—76.5% and 76.7—94.2% respecti-vely.The average number of eggs laid by each female...

Laboratory tests were carried out to study the artificial diets for the larvaeand adults of the green lacewing,Chrysopa sinica T.The following diets wereused:Larval diet:Fresh egg 40gBrewer's yeast 30gHoney 20gCane sugar 10gAscorbic acid 0.1gwater 100mlAdult diet:Porcine liver powder 10gBrewer's yeast 10gWater 100mlTen successive generations have been reared on these diets.The average rateof cocooning and adult emergence was 58.3—76.5% and 76.7—94.2% respecti-vely.The average number of eggs laid by each female was 464.8 to 1561.7 andthe maximum number of eggs laid by one female was 2484.

本文报道中华草蛉(Chrysopa sinica Tjeder)用幼虫人工饲料(鲜鸡蛋40克、啤酒酵母30克、蜂蜜20克、蔗糖10克、抗坏血酸0.1克、水100毫升)和成虫人工饲料(猪肝粉10克、蜂蜜20克、啤酒酵母10克、水100毫升)连续饲养繁殖十个世代的试验结果。各代幼虫生长发育、结茧和羽化基本正常,成虫能大量产卵。一至十代幼虫平均结茧率为58.3—76.5%,平均羽化率为76.7—94.2%,成虫产卵前期为4—6天,平均产卵量为464.8—1561.7粒,其中一至三代平均产卵量均在千粒以上,最高的达2484粒,三代以后产卵量有下降趋势。

 
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