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1·Near the end of each instar, the larva undergoes a process called apolysis.

每一个龄期快结束时，幼虫会经历老落这一过程。

2·The wing buds extend to 3 rd abdomen on 5 th instar.

五龄时翅芽延伸至腹部第三节。

3·The wing buds were found on the 4 th instar dorsal view.

四龄若虫由背面观具明显翅芽；

4·With 8th instar nymphs, the critical period for regeneration was from 20 to 26 days-old.

以8龄若虫为研究对象，发现其再生临界期为20 ~ 26日龄。

5·The enzyme activity of the 5th instar was the highest and that of the pupa was the lowest.

结果表明，不同虫态及虫龄的多酚氧化酶活力有很大的不同，其中以5龄幼虫酶活力最高，蛹酶活力最低。

6·Natural survival rate of eggs and the various instar larvae in different years were also investigated.

并观察了不同年份棉铃虫卵和各龄幼虫的自然存活率。

7·In contrast, the temperature did not distinctly influence the survival of both 3rd and 5th instar larvae.

温度对3龄幼虫取食、生长和存活无显著影响，但对5龄幼虫的取食和体重增长则有显著影响。

8·Fasting experiments with the fifth instar larva indicate that free lipidscould be utilized as an energy source.

结合幼虫饥饿实验，表明游离脂肪是可以被动用的作为能源的物质之一。

9·Above: Salivary lips showing parallel ridges of inner surface of lower lip, last larval instar of Osmia chalybea.

上图：壁蜂老熟幼虫下唇内表面的平行纹

10·The stages of egg, larva of instar 1 to 4, pupa, and the whole generation were influenced greatly by temperature.

对于不同的生活史阶段，豆荚野螟卵、1～ 4龄幼虫、蛹及整个世代受温度影响显著；

龄

1·It was showed that high mortalities in the stages of egg(13 5%), 1st instar larvae(18 2%)and pupae(19 0%) were the main factors influencing the growth of the experimental population.

结果表明，卵期、 1龄幼虫期、蛹期的死亡率较大，分别为13 5 %、 18 2 %和19 0 % ，是影响种群数量增长的主要因子。

2·Various corn borer microsporozoites were used to feed and soak Dendrolimus honi larvae at the instar of 1,2,4 and 7 for infecting them.

用不同浓度的玉米螟微孢子虫悬浮液，饲喂及浸泡感染1、2、4、7龄云南松毛虫幼虫。

3·In experimental populations, mortalities of the 5th instar larvae and pupae were higher than those of instars at initial stages.

实验种群中初期死亡率较低，5龄幼虫和蛹的死亡率较高。

4·A large amount of sericin protein was synthesized after the 5th day of the last instar and its synthetic activity was the highest on the last day of the 5th instar.

中部丝腺中丝胶蛋白的大量合成，是在五龄5日以后，以熟前一日合成活性最高。

5·The results showed that the absorption of nitrogen decreased hile that of sugar increased with larval development from the third to fifth instar.

结果表明：幼虫对饲料中氮的吸收能力随虫龄增加而下降，对糖的吸收能力则随之而增强；

龄期

1·The experimental results reveal that the infective mortality of larva microsporidiosis reduces with the increase of larva instar and increases with the increase of spore concentration.

试验结果表明：幼虫感染微孢子虫病的死亡率随幼虫龄期的增大而减弱，随孢子浓度的增加而增大。