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幼虫生长
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  larval growth
    RESPONSES OF TWO HELIOTHIS SPECIES TO PLANT SECONDARY SUBSTANCES: THE INFLUENCE OF HOST SECONDARY SUBSTANCES ON LARVAL GROWTH AND FOOD UTILIZATION
    实夜蛾属二近缘种对寄主植物次生物质的反应:次生物质对幼虫生长和食物利用的影响
短句来源
    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
  larval growth
    RESPONSES OF TWO HELIOTHIS SPECIES TO PLANT SECONDARY SUBSTANCES: THE INFLUENCE OF HOST SECONDARY SUBSTANCES ON LARVAL GROWTH AND FOOD UTILIZATION
    实夜蛾属二近缘种对寄主植物次生物质的反应:次生物质对幼虫生长和食物利用的影响
短句来源
    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
  larvae growth
    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
短句来源
  “幼虫生长”译为未确定词的双语例句
    Effects of Temperature on the Development of Culex tritaeniorhynchus Larvae.
    温度对三带喙库蚊幼虫生长发育的影响
短句来源
    Study on the Effect of Erythrosin B on the Growth of House Fly Larvae
    赤藓红B对家蝇幼虫生长作用的研究
短句来源
    POPULATION SEASONALITY AND LARVAL DEVELOPMENT OF LAGRIA HIRTA L. (COLEOPTERA: LAGRIIDAE)
    欧洲伪叶甲Lagria hirta L.种群季节变化和幼虫生长发育(鞘翅目:伪叶甲科)(英)
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。
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
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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.
      
更多          
  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.
      
更多          
  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.
      


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?

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。

The percentage of body water of the armyworm, Leucania separata Walker, wasfound to fluctuate during its larval development in a regular pattern and to be influencedby the water content of its diet. The body of a newly hatched larva had a water con-tent of about 83.07% and a lipid content of 8.47% (of the dry weight); in the secondinstar its body water content increased to 89% but the lipid content dropped to 2.4%.In the following several instars the water content remained at higher values, which fluc-tuated...

The percentage of body water of the armyworm, Leucania separata Walker, wasfound to fluctuate during its larval development in a regular pattern and to be influencedby the water content of its diet. The body of a newly hatched larva had a water con-tent of about 83.07% and a lipid content of 8.47% (of the dry weight); in the secondinstar its body water content increased to 89% but the lipid content dropped to 2.4%.In the following several instars the water content remained at higher values, which fluc-tuated regularly in the different stages within each instar, being lowest after moulting,increasing during feeding and declining again when it ceased to feed and became readyto moult. The lipid content increased during the larval development until the insectreached the prepupal stage when it dropped. Under laboratory condition, the larva in its life span was found to consume a totalweight of 3 grams of fresh corn leaves (dry weight 0.6 grams). The percentage ofdietary water retention was found to be very high in the first and second instars, about98.9% of the water present in the food, and low in the last instar, the correspondingfigure being 13.67%. This may indicate that there is a sharp difference in the waterrequirement of this insect in the earlier and later stages of its larval development. Corn leaves were used in the study of the influence of dietary water content on thepercentages of food and water utilization, and advantages were taken to compare thereactions of the larvae to the left and right halves of a leaf which were very similar inchemical composition but with their water contents artificially altered by putting themin atmospheres of different relative humidities for a same length of time. Determinationsshowed that when the water contents of the leaf fragments were different, there was nosignificant difference in the percentages of food utilization, but the amounts of food con-sumed were markedly different: the larvae used to consume the leaf with higher watercontent to a significantly greater amount in fresh weight and thus gained a relativelyhigher body weight. Here the water in the leaves was seen to act as a phagostimulant.The adverse effect of leaves with lower water contents on larval growth seemed to bedue to the shortage of this phagostimulant. The larvae feeding on succulent leaves hadhigher water content in their bodies. The evidence of the present work proved that the consumption of a larger amount of food led to the greater accumulation of water derivedfrom the diet rather than the absorption of a larger amount of water from a unit weightof the diet. Thus the relation between the water content of the food plant and theamounts of nutrients absorbed in this insect may be analogous to that in the aphid,where the turgor of the food plant caused by the increase in water content enhancesfood ingestion, but the concentrations of the ingested nutrients decreased (Kennedy,et al., 1959). Dry air was unfavourable for larval growth, especially in younger instars. Gene-rally speaking, as development proceeds, the larva possesses gradually a greater capacityin the regulation of the water content of its body by effective prevention of water eva-poration and production of metabolic water.

粘虫在幼虫的不同发育阶段中,身体的含水量常有明显的变动。这种变化显然可受食物含水量的影响。初孵化幼虫的含水量约在83%左右,到2龄盛食期增高到约为89%,以后变动于90%上下,到末龄成熟时剧烈下降,在化蛹前到达73%左右。在每一龄期中,刚蜕皮而尚未取食时含水量最低,盛食期最高,在蜕皮前又行下降。在试验室条件下以玉米叶饲养的粘虫全幼虫期取食叶片共约3克左右,合干重0.6克;对食物的利用率以鲜重计算为20%左右,以干重计算为24%左右。但不同龄期的食物利用率不同:幼龄的比老龄的高。与此类似的,是不同龄期幼虫对食物中水分的吸收率不同:在一、二龄幼虫中,所吸收的水分占食物鲜重74.9%,相当于食物所含水分的98.9%:而在最后两龄幼虫中,相应数值分别为10.7%和13.6%。故食物中水分对于幼虫的营养作用在幼龄时似乎更为重要。当以其它成分大致相等而含水量不同的玉米叶饲养幼虫时,含水量即使相差不远,也可明显地影响幼虫的生长;此效应在幼龄幼虫中更为显著。随食物所吃下水分的多寡略能影响幼虫对水分的吸收,但差异不显著;此因素虽可影响虫体的含水量,但并不影响幼虫对食物的利用率。食物含水量对幼虫生长的影响,主要是因取...

粘虫在幼虫的不同发育阶段中,身体的含水量常有明显的变动。这种变化显然可受食物含水量的影响。初孵化幼虫的含水量约在83%左右,到2龄盛食期增高到约为89%,以后变动于90%上下,到末龄成熟时剧烈下降,在化蛹前到达73%左右。在每一龄期中,刚蜕皮而尚未取食时含水量最低,盛食期最高,在蜕皮前又行下降。在试验室条件下以玉米叶饲养的粘虫全幼虫期取食叶片共约3克左右,合干重0.6克;对食物的利用率以鲜重计算为20%左右,以干重计算为24%左右。但不同龄期的食物利用率不同:幼龄的比老龄的高。与此类似的,是不同龄期幼虫对食物中水分的吸收率不同:在一、二龄幼虫中,所吸收的水分占食物鲜重74.9%,相当于食物所含水分的98.9%:而在最后两龄幼虫中,相应数值分别为10.7%和13.6%。故食物中水分对于幼虫的营养作用在幼龄时似乎更为重要。当以其它成分大致相等而含水量不同的玉米叶饲养幼虫时,含水量即使相差不远,也可明显地影响幼虫的生长;此效应在幼龄幼虫中更为显著。随食物所吃下水分的多寡略能影响幼虫对水分的吸收,但差异不显著;此因素虽可影响虫体的含水量,但并不影响幼虫对食物的利用率。食物含水量对幼虫生长的影响,主要是因取食量不同而产生的:幼虫对含水较多的叶片取食量较大,因此生长较快。幼虫在?

 
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