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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 ;
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     Negative effect of selection appeared on larval growth of BS 2,it was originally from crossing between two different populations. No differences on larval growths displaied respectively between another crossing lines, BD 2and DS 2,and unselected control line.
     选择对种群间杂交系列 (BD2 、BS2 和DS2 )的影响分为两种情况 :对BS2 幼虫的生长有负作用 ,而对BD2 和DS2 幼虫生长无影响 ,与SC1幼虫的生长速度比较无显著性差异。
短句来源
     The effects of different moisture content feed on the larval growth, which was that larval weight added greatly along with the moisture content increasing of feed, and the larvae grew quickly, their weight added greatly, but their mortality is high of the high moisture content (30%~35%) feed.
     不同含水量饲料对黄粉虫幼虫生长的影响,整个生长情况是幼虫体重随着饲料含水量的增加而增大,高含水量(30%~35%)的处理组幼虫生长较快,体重增加较大,但死亡率较高;
短句来源
     Effects of increased atmospheric CO_2 on nutritional contents in poplar (Populus pseudo-simonii (Kitag.)) tissues and larval growth of gypsy moth (Lymantria dispar)
     小青杨组织营养品质和舞毒蛾幼虫生长对大气CO_2浓度升高的响应
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     The larval weight gain was similar of middle density. So the high density in 0~30days and then the density of 4.7~7.9 one/cm2 in industrialized production should be adopted. In the different stage of the larval growth of T.
     二是其后的时间内,低密度的幼虫生长要快得多,体重增幅较大,中间密度的幼虫体重增加相近,因此,在工厂化生产中应先采用0~30d内高密度养殖,30d后将密度降低为4.7~7.9头/cm2。
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  larvae growth
     At range of water temperature:27-31℃,pH:7.5-8.5, salinity:15-30, it is the fastest on larvae growth and metamorphosis.
     在水温 2 6~ 32℃ ,pH7.8~ 8.5 ,盐度 15~ 30的条件下 ,幼虫生长及变态最快。
短句来源
     INFLUENCE OF TRACE ELEMENTS ON THE LARVAE GROWTH OF THE GHOST MOTH (Hepialus)
     微量元素对虫草蝠蛾幼虫生长发育的影响
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  “幼虫生长”译为未确定词的双语例句
     The results obtained show that all range of the examined EDTA(0.5×10 -6 -5.0×10 -6 )can make the larvae grow faster.
     结果表明:所有试验的EDTA浓度(0.5×10-6—5.0×10-6)均能促进幼虫生长
短句来源
     An Experimental Study on Effect of Feed Species and Density on Growth of Babylonia areolata ( Lamarck)
     饵料种类与密度对方斑东风螺Babylonia areolata(Lamarck)幼虫生长影响的实验研究
短句来源
     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
     Growth of young lasted 1.5—3 hours, of adult, 20—22 hours.
     幼虫生长发育期需1.5—3小时。 成虫生长成熟期需20—22小时。
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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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  larvae growth
However, the inhibitory effect of AA on larvae growth could be suppressed by the dietary addition of DHA (at a level of 21.6% of the total fatty acids in enrichment lipids).
      
Physiological studies with FTC and THW larvae showed that consumption of leaf tissue from the transgenic lines is deleterious to larvae growth, apparently due to a postingestive mechanism.
      


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

The changes in the weights and constituents of the fat body and hemolymph of thefemale and male Eri-silkworm (Philosamia cynthia ricini Boisd.) before and after pupa-tion have been studied and their interrelations discussed. The main results of this inves-tigation are as follows: 1. The dry weight of fat body and the volume and dry weightof the hemolymph increase during the course of growth in the last larval instar and de-crease after the commencement of spinning. The values of the above mentioned quan-tities...

The changes in the weights and constituents of the fat body and hemolymph of thefemale and male Eri-silkworm (Philosamia cynthia ricini Boisd.) before and after pupa-tion have been studied and their interrelations discussed. The main results of this inves-tigation are as follows: 1. The dry weight of fat body and the volume and dry weightof the hemolymph increase during the course of growth in the last larval instar and de-crease after the commencement of spinning. The values of the above mentioned quan-tities of the female individuals are always higher than those of the male. However, thedry weight of the fat body begins to decrease in the prepupa stage. This fact indicatesthat the decrease of dry weight of the silkworm during spinning has nothing to do withthe fat body. 2. The major carbohydrate component of the larval hemolymph is tre-halose. Before spinning the blood sugar reserve attains the maximal level: 1513.5 mg/100ml in the female and 1405.4 mg/100 ml in the male. During pupation, sugar of lowmolecular weight other than trehalose appears in the hemolymph. Probably this newlyappeared sugar relates to the formation of chitin. The highest content of fatty acid inhemolymph appears before spinning: 351.6 mg/100 ml in the female and 327.3 mg/100 ml in the male. The change in the amount of the fatty acid in hemolymph isparallel with that of the blood sugar; but the content of the former is lower than that ofthe latter. The total nitrogen content in the hemolymph is much higher than carbo-hydrate and lipid: 2720 mg/100 ml in the female and 1840 mg/100 ml in the male. Itdecreases to about half of this value before spinning. This decrease may be correlatedwith the development of silk glands. 3. The major carbohydrate stored in the fat bodyis glycogen. Before spinning it is 20.0% of the dry weight in the female and 19.5% in the male, during the spinning stage part of the glycogen is hydrolyzed, and from theperiod of spinning to pupation about 70% of it is utilized. 4. The lipid content ofthe fat body increases with the growth in the last larval instar. Before spinning itconsists more than half of the dry weight of fat body: 50% in the female and 59% inthe male, but the weight of the total lipid in the former is higher than that in the latter.In the spinning stage, the lipid continues to be synthesized in the fat body. From theend of spinning to pupation about 33% and 30% of the lipid are expended respectivelyin the female and the male. 5. The change of nitrogenous constituents of fat bodydiffers from that of glycogen and lipid. From the 4th larval moult to the beginning ofspinning it decreases to about half of its highest value. After spinning it increases againto one and one half times its value before spinning. The above facts may indicate thatbefore spinning the nitrogenous constituents are chiefly used for the synthesis of silk andafter spinning the newly formed nitrogenous constituents are stored in the fat body. Thisaccumulation may be correlated to the future development of the reproductive system.This investigation has shown that during the metamorphosis of the Eri-silkworm, the fatbody and hemolymph have important functions in the storage, transportation and meta-bolism of nutrient materials and there is a sexual difference in their contents. It in-dicates that the fat body and hemolymph may play an important role in the maintenanceof normal growth, development and reproduction of insect in general.

蓖麻蚕末龄幼虫的脂肪体干重、血淋巴体积和干重,均随幼虫的生长而增加:并且雌体经常高于雄体。在蜕皮过程和吐丝以后的绝食期间,这两种组织的含量减少;其中,脂肪体的干重在前蛹期后才开始降低,表明吐丝过程虫体干重的减少与脂肪体无相应关系。蓖麻蚕末龄幼虫血淋巴中主要醣类是海藻糖。上簇前血淋巴含醣量到达最高峰:雌体为1513.5毫克/100毫升,雄体为1405.4毫克/100毫升。化蛹前后,血淋巴中出现另种低分子醣,此成分可能与几丁质的形成有关。血淋巴中脂肪酸含量的变化与血糖平行,但份量较少:最高含量是在上簇前:雌雄分别为351.6毫克/100毫升和327.3毫克/100毫升。熟蚕期,血淋巴中含氮物质的含量远比醣和脂肪酸为高:雌雄的血淋巴总氮分别到达2720毫克/100毫升和1840毫克/100毫升;但在上簇前总氮减少近一半,其变化与丝腺的发育有关。糖元是蓖麻蚕脂肪体贮存的主要醣类,它的含量随幼虫的生长而增加。上簇前雌雄幼虫的脂肪体分别含糖元20.0%和19.5%:在吐丝过程中脂肪体中的糖元显然发生水解。从上簇到化蛹,糖元消耗达70%以上。此外,脂肪体中的脂肪也随末龄幼虫的生长而增多:但雌雄幼虫的脂肪体中脂肪含量与糖元不...

蓖麻蚕末龄幼虫的脂肪体干重、血淋巴体积和干重,均随幼虫的生长而增加:并且雌体经常高于雄体。在蜕皮过程和吐丝以后的绝食期间,这两种组织的含量减少;其中,脂肪体的干重在前蛹期后才开始降低,表明吐丝过程虫体干重的减少与脂肪体无相应关系。蓖麻蚕末龄幼虫血淋巴中主要醣类是海藻糖。上簇前血淋巴含醣量到达最高峰:雌体为1513.5毫克/100毫升,雄体为1405.4毫克/100毫升。化蛹前后,血淋巴中出现另种低分子醣,此成分可能与几丁质的形成有关。血淋巴中脂肪酸含量的变化与血糖平行,但份量较少:最高含量是在上簇前:雌雄分别为351.6毫克/100毫升和327.3毫克/100毫升。熟蚕期,血淋巴中含氮物质的含量远比醣和脂肪酸为高:雌雄的血淋巴总氮分别到达2720毫克/100毫升和1840毫克/100毫升;但在上簇前总氮减少近一半,其变化与丝腺的发育有关。糖元是蓖麻蚕脂肪体贮存的主要醣类,它的含量随幼虫的生长而增加。上簇前雌雄幼虫的脂肪体分别含糖元20.0%和19.5%:在吐丝过程中脂肪体中的糖元显然发生水解。从上簇到化蛹,糖元消耗达70%以上。此外,脂肪体中的脂肪也随末龄幼虫的生长而增多:但雌雄幼虫的脂肪体中脂肪含量与糖元不同,雌体高于雌体(雄体为59%,雌体为50%)。在吐丝过程中脂肪继续在脂肪体中合成。从吐完丝?

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。

 
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