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。
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。
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。
The results showed that; (1) MH comes into antagonism with AJH, but JH doesn't antagonize AJH in the 2nd, 3rd and 4th instar larvae treated by the hormones.
结果表明：(1)2龄、3龄和4龄蚕应用外源激素处理，AJH与MH之间存在明显的拮抗关系；而ajh与JH间未表现出拮抗关系。
Microarray data in different tissues showed that it has significant expression signals in head and epidermis of day-3 5th instar larvae, which was verified by RT-PCR.
基因芯片数据显示在家蚕5龄第3天的头部和体壁组织中的表达量较高，RT - PCR验证结果与此一致。
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。
The parasitizing rate and pupae weight which were bred in the larvae of the 1st instar were the lowest but the mortality rate after parasitizing was the highest.
寄生蜂对1龄寄主幼虫的寄生率以及1龄粘虫育出的茧重均是三个龄期寄主中最小的，但死亡率却是三者间最高的。
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。
The parasitized DBM larvae had prolonged their 4th instar duration obviously, and the later the larva had been parasitized, the longer this extended duration became.
小菜蛾幼虫被寄生后，其4龄发育历期较未被寄生的显著长，且寄生时龄期越大4龄历期延长越多。
The larvae before 4th instar were aggregate distribution and after 5th instar were even distribution on chinese cabbage.
在白菜上，幼虫在4龄前为聚集分布，5龄以后为均匀分布，棉花和向日葵上各龄幼虫均为聚集分布。
The results showed significant effects of different environment colors on the developmental duration of H. axyridis larvae in each instar.
结果显示：不同环境颜色条件对异色瓢虫幼虫各龄历期均有显著影响；
Different kinds of food taken by the larvae of Eriogyna pyretorum(Westwood) have a great influence on their appetite, instar-stage and mortality.
樟蚕幼虫取食不同食物，对其食量、龄期、死亡率等均有明显影响。
Objective This study investigated the differences and the antibacterial activity of the antibacterial peptides of third-instar housefly larvae that were induced by varies microorganisms.
目的研究不同微生物诱导家蝇幼虫表达抗菌肽的差异以及其抗菌活性与特性。
The results showed that parasitized rates of host larvae fed on KMD1 were significantly (3rd instar) or very significantly (4th and 5th instar) lower than those of the control.
结果发现：KMD1处理后，三个龄期幼虫的寄生率都显著下降，其中4龄和5龄达极显著水平；
The results showed that parasitized rates of host larvae fed on KMD1 were significantly (3rd instar) or very significantly (4th and 5th instar) lower than those of the control.
结果发现：KMD1处理后，三个龄期幼虫的寄生率都显著下降，其中4龄和5龄达极显著水平；
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