幼虫的

Cry8Ca2 protein encoded by the gene cry8Ca2 of Bacillus thuringiensis is a kind of insecticidal crystal protein with molecular mass of 130kDa.It is larvicidal to both Anomala corpulenta and A.exoleta .

cry8 Ca2基因是本实验室自行分离克隆的一种新型苏云金芽孢杆菌( Bacillus thuringiensis ，Bt)杀虫晶体蛋白基因，其表达130 kDa蛋白对铜绿异丽金龟和黄褐异丽金龟( A.exoleta )幼虫具有较高的活性。

By using the technics of scanning electron microscope, the shape, amount and distribution of the antennal, maxillary and labial palps, urogomphi sensilla of the larva Carabus prodigus were observed and their function were discussed.

摘 要：应用环境扫描电镜对奇步甲幼虫触角、下颚须、下唇须和尾突感器进行观察，对各类感器的数量、长度及分布特点等进行描述，并探讨各类感器的功能。

RESULTS: The growth speed, weight, developmental uniformity, bionergy and fecuncity of the Bombyx silkworm descent dramatically as they eat the feed that the concentration of 2,4-DCP over 0.8 mmol L~-1 or NP exceed 0.500 mmol L~-1. But the effect on reproductive capacity vary with gender difference, it's more obvious on the late-stage of development and periods of metamorphosis such as ecolysis, pupation, edosion. There may be cumulative effect inside the Bombyx siliworm.

结果 家蚕幼虫食下含0.8 mmol·L~(-1)以上浓度的2，4-DCP或0.500 mmol·L~(-1)以上浓度的NP饲料，生长速度、生长量、发育整齐度、生命力和生殖能力都明显下降；生殖能力所受影响应性别而不同；家蚕发育后期和蜕皮、化蛹、羽化等变态时期影响更加明显，在蚕体内可能有累积作用。

The Cassidoidea, a new superfamilyThe new superfamily here erected is exactly identical to the old group Cryptostoma of Chapuis, comprising the Hispinae and the Cassidinae.

这两点差别，结合其他特征如头型、幼虫型等，说明了隐口类和其他叶甲是两个不同的物群，代表鞘翅目发展的两个不同阶段，应分立为两个不同总科。

According to the chaetotaxy of the head, the notodontid larvae may beclassified as three different types: With ...

4天社蛾幼虫体毛的分布，可分下列几个类型：除腹足外身体的其他区域仅具原生毛。

In all the problems in water supply, the remove of Chironomus larva from drinking water has become one of the most important, and it is very difficult to effectively remove by conventional methods.

摇蚊幼虫难以被常规的水处理工艺有效地去除，成为又一困扰水厂正常生产运行的水处理问题。

They've learned basic sign language in laboratories, and in nature, they exhibit tool use, fashioning sticks to dig for termites and grubs, smashing nuts with rocks, and crumpling leaves to collect water.

在语言实验室里，他们可以掌握简单的语言。在大自然中他们能够使用工具，例如用木棍钓白蚁或掏可以食用的幼虫，用石头砸开坚果，用树叶收集饮用水。

Analyses of stomach contents showed that, for adult bullfrogs, the most important prey items overall were Decapoda, Coleoptera, Odonata, Mesogastropoda, Raniformes, and Cypriniformes; while for juvenile bullfrogs, they were Decapoda, Coleoptera, Cypriniformes, Odonata, Orthoptera, Hymenoptera, Lepidoptera larvae, Mesogastropoda, and Raniformes. Moreover, prey size and diet volume increased with the body size of both adult and juvenile bullfrogs. The diet composition of primary preys of bullfrogs was significantly different among different islands.

食性分析结果表明：(1)按食物体积计算，成年牛蛙以十足目、鞘翅目、蜻蜓目、中腹足目、蛙形目和鲤形目为主要食物，亚成体牛蛙以十足目、鞘翅目、鲤形目、蜻蜓目、直翅目、膜翅目、鳞翅目幼虫、中腹足目和蛙形目为主要食物；成体和亚成体牛蛙胃中食物的平均大小均随其体长增加而增大；(2)不同岛屿上的牛蛙在主要食物类型构成上存在差异。

The studies on the dionomics of Dendroctonus valens show that this pest overwinters mainly as adult or 3~4 larva in roots of pine at Hancheng region in Shaanxi Province. It occurres 2 generations one year by adult overwintering and 1generation one year by larva overwintering.

红脂大小蠹原产北美洲 [1~3]， 1996年随木材贸易传入我国， 2001年发现于陕西省黄龙桥山林区，现已在延安和渭南地区发生危害，涉及 4个县的 18个林场，主要危害 20a生以上油松活立木的基部和根部，以成虫和幼虫蛀食树体韧皮部，短期内可导致被害木枯萎死亡。

The paper dealted with effect of ethanol extract from the root bark of Tripterygium wilfordii on bioactivities of diamond-back moth, Euproctis bipunctapex .

研究雷公藤乙醇提取物对乌桕毒蛾的生物活性，结果表明，雷公藤提取物对4龄乌桕毒蛾幼虫具有很强的生长发育抑制作用，其抑制中浓度EC50为

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐