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。
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.
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 contrast, the temperature did not distinctly influence the survival of both 3rd and 5th instar larvae.
并观察了不同年份棉铃虫卵和各龄幼虫的自然存活率。
Natural survival rate of eggs and the various instar larvae in different years were also investigated.
实验种群中初期死亡率较低，5龄幼虫和蛹的死亡率较高。
In experimental populations, mortalities of the 5th instar larvae and pupae were higher than those of instars at initial stages.
本文提供上海地区最常见嗜尸性蝇类三龄幼虫图解检索表，共4科11种。
The present paper gives the key to the third stage larvae of the most common necrophagous flies, including 11 species, belonging to 4 families.
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；
The stages of egg, larva of instar 1 to 4, pupa, and the whole generation were influenced greatly by temperature.
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。
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.
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。
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.
对幼虫的生物活性，均随虫龄的增加而下降，且集琦虫螨克的活性远比菜喜高。
The larvicidal activity of avermectin was significantly higher than that of spinosad, and both decreased with increase of the larval age.
在行为实验中发现，挥发性次生代谢物能够影响亚洲玉米螟一龄幼虫的定向选择和成虫的产卵行为。
Large amount of volatile secondary metabolites were also induced by the feeding of Asian Corn Borer larvae.
幼虫共8龄，每头幼虫取食针叶60根左右。
The larva has 8 instars, and one larva feeds on about 60 needles.
对线虫有强致死作用的菌株并不具有较高的几丁质酶活，细菌对北方根结线虫二龄幼虫的致死作用与其分泌的几丁质酶活性的高低相关性不大。
The activities of chitinase for effective and non-effective strains had not much difference, and the strains which were strongly lethal to the juveniles did not have high activity of chitinase.
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 parasitized DBM larvae had prolonged their 4th instar duration obviously, and the later the larva had been parasitized, the longer this extended duration became.
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 larvae before 4th instar were aggregate distribution and after 5th instar were even distribution on chinese cabbage.
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。
The enzyme activity of the 5th instar was the highest and that of the pupa was the lowest.
幼虫有五龄。
经10天左右的培养，叶片长、宽度增长速率明显减慢，此时是接种斑潜蝇的最佳时机，15天后即斑潜蝇幼虫生长到3龄时，叶面积达最大。
The increasing rate of width and length of primary leaves decreased obviously after 10 days planting. The leaves got their maximum areas after 15 days while L. sative was just at the 3nd instar stage.
幼虫共有5龄，以夜晚蜕皮为主，5龄幼虫老熟后即觅地化蛹，化蛹持续时间2 - 4天。
The larvae had five instars, and exuviated at night, pupated at 5rd instar old larvae, pupation time need 2-4 days.
本文首次报道了制备家蚕，五龄初期幼虫后部丝腺线粒体DNA的结果。
We will first report the results about the preparation and properties of mtDNA in the posteria silk gland at the beginning of the fifth laval stage Bonibyx mori.
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；
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；
The results showed significant effects of different environment colors on the developmental duration of H. axyridis larvae in each instar.
各发育阶段虫体测量值显示，体宽呈连续增大趋势，体长以三龄幼虫最长。
The measure values of various developmental stages of wasps showed that a continuous increase in wide trend and the longest body was observed in 3rd nymph.
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；
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.
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