幼虫的

Abstracts:Ash beech borer dies once a year.Its young worms decays drill in oleaceae ash plants of the genus phloem and xylem and makes the tree bark longitudinal crack or collapse and even cause trees death. and wither.

摘 要：白蜡窄吉丁虫在沈阳地区，主要以幼虫在木樨科梣属树木的韧皮部与木质部间钻蛀危害，使树皮纵裂或崩开，导致树木枯萎死亡。

Toxicity effects of heavy metals and polluted dredged materials on juvenile of Sinonovacula constricta, straighthinge of Ostrea plicatula, and larvae of Artemia, larvae of Penaeus pencillatus have been studied.

研究了重金属和污染疏浚物对缢蛏Sinonvaculaconstricta稚贝和幼贝、褶牡蛎Ostreaplicatula幼虫、甲壳类的卤虫Artemiasp。

Were parasitized larvae overwinter in the frozen soil layer below, known as winter worm.

被寄生的幼虫在冻土层以下越冬，称为冬虫。

3 Larvae stages of Postosia brevitarsis Leiwis overwinter in dung of cow, sheep, and pig with rich humus.

以2~3龄幼虫在腐殖质丰富的牛、羊、猪粪中越冬，未见有成虫越冬现象。

Of 48 (16 7%) cases with paragonimiasis showed positive cross reaction.

幼虫冰冻切片的抗原活性于－20℃可保存至5年。

The larvae of flies parasitize earthworms.

蝇的幼虫寄生在蚯蚓上。

This protein had strong oral toxicity to pieris and LD50 was 2.7 mg.

此毒素对菜青虫初孵幼虫有较强的口服毒性，LD50为2.7mg/头。

The effects of the extracts from Brucea javanica using chloroform and ether acetate on the activity of protease and the protein contents of Pieris rapae were studied.

鸦胆子氯仿和乙酸乙酯提取物对菜青虫幼虫蛋白酶的活性和蛋白质含量均有明显影响。

The benzene fraction of the liquid-liquid partitioning was found to be the most active against the larvae of Plutella xylostella and Pieris rapae, with the rate of antifeeding, at ×50 dilution, of 97.7%and 97.3%, respectively, after 12 h exposure.

液—液分配法中，苯提取物的拒食活性最高，在50倍稀释浓度下，小菜蛾Plutella xylostella和菜粉蝶Pieris rapae幼虫对其拒食率分别为97.7%和97.3%。

In the present study, the effects of food restriction on the growth, survival and metamorphosis of Pinctada fucata were investigated from April 27 to May 25 in 2009 under different feeding conditions.

自2009年4月27日至2009年5月25日，在不同投饵条件下研究了限食对合浦珠母贝幼虫生长、成活和变态的影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。