查询词典 larva

Result The central leaves of the plants were dehydrated and wilting, or the leaf was broken from the basal part of the leafstalk or rachis after the stem was damaged by the R. ferrugineus larva. The larva could leave regular boring holes on the plant pinna or lobe.

结果］红棕象甲幼虫蛀茎会导致植株心叶脱水垂软，后干枯，或者叶于叶柄或叶轴基部折断，幼虫蛀蚀会在植株羽片或裂片上留下整齐的蛀蚀孔。

Analysis of the obtained genome amplification showed that DNA after PCR presented obvious polymorphism, and the results were the same using the same primer to amplify the larva and imago of the same species. It indicates that RAPD technique can be applied to the identification of dry samples and dipped larva sample of longicorn beetles as well as the research of phylogeny. These three methods for extracting genome DNA from different species of longicorn beetles at different preserved time are feasible.

对所获得的基因组扩增分析表明，经过PCR之后的DNA能呈现明显的多态性，同种天牛用同一引物扩增幼虫和成虫所获得的结果相同，可以认为，RAPD技术可以应用于天牛成虫干标本及幼虫浸渍标本的鉴定及系统发育研究中，也证明了这3种方法用于提取不同保存时间、不同种天牛基因组的DNA是切实可行的。

The results showed that water content decreased first, then increased in the gastrula stage of embryonic development, reached the highest content at the second phrase larvae stage and then began to decrease from the third phase larva stage. The content of lipid in the dry weight increased with the embryonic development stages, but decreased at intramembranous nauplius stage, the second phase larva, and the infant stage of larvae development. The rate of lipid in wet weight decreased and the content of C20:4w6、20:5w3 and C22: 6w3 decreased.

结果显示，黑斑口虾蛄在胚胎和幼体的发育过程中，水的体积分数先降低，至原肠胚期开始升高，到第二相幼体期达到最高，之后又有所回落；脂类占组织干重的比率呈升高趋势，但分别在膜内无节幼体、第二相幼体和仔虾蛄期略有降低；脂类占组织湿重的比率呈降低趋势；花生四烯酸、EPA和DHA的体积分数都呈降低趋势。

Morphology and Ultrastructure of Compound Eyes in the larval stages of Cherax quadricarinatus Morphology and Ultrastructure of Compound Eyes was investigated by TEM and SEM in the larval stages of Cherax quadricarinatus. The result is indicated: Morphology of compound eye and ommatidium in the larval stage were similar to that in adult stage. The area of the ommatidia increases from 906±29. 6μm〓 in larva Ⅰ(1. 5cm long) to 967±53. 3um〓 in larva Ⅲ(3cm long) and 3724±230.3μm〓 in adult (16cm long).

扫描电镜结果表明：刚离开母体的仔虾（体长约1cm）复眼和小眼的形态已接近成体，小眼的平均表面积由1.5cm仔虾的906±29.6um〓增长为3cm仔虾的967±53.3um〓和16cm成体的3724±230.3um〓；小眼个数也从体长1.5cm仔虾的1001个增加到3cm仔虾的1238个和16cm成体的5652个，红螯螯虾复眼的增大是由于小眼面积的增加和小眼数目的增多而引起的。

A model system for the relationship between parasitoid and its host was established by microoperation to study the effects of polydnavirus and venom from female parasitoid, teratocytes from parasitoid larva and the larva itself on the growth of the host.

通过显微手术建立一套研究寄生蜂和寄主关系的实验模型，以寄主体重为指标，用该模型研究了来自寄生蜂的活性物质多态DNA病毒(PDV，蜂毒，畸形细胞和幼蜂本身对寄主生长发育的影响。

In our experiment, we found two abnormal phenotypes that one only the last three segments develop into pupa, but the other segments are still keep the larva characters; another sample has differently develop speed between abdomen and backside, which resulted in the back develop into pupa but the abdomen were still the larva characters. When we add Az in the feed of injected EcR-dsRNA samples, in the 13 live larvae we found that 6 have the abnormal proleg phenotypes.

在另一组注射EcR-dsRNA以后通过浸叶法添食不同浓度的印楝素，在10ppm处理组存活的13个个体中有6个出现特异表型，其中两个幼虫为不完全蜕皮，尾部体节无法蜕皮导致发育受阻；另外发现4个供试虫体发育至五龄时出现腹足缺失表型，其中有两个是腹足几乎全部缺失，腹足应该生长的部位只有少数几个突起，没有发育成形的腹足；一个出现左侧腹足完全缺失，右侧第二腹足缺失表型；另一个个体只缺失了左侧最后一个腹足。

Research in Hawaii has show that doses of 1,000 Gy or more may be required to prevent hatch of irradiated eggs, molting of treated larva e to the next instar or pupation of treated mature larva e.

夏威夷的研究表明，阻止辐照过的卵孵化、被处理幼虫蜕皮进入下一龄期或被处理老熟幼虫化蛹，可能需要1000居里或更高的剂量。

Methods The larva and adult rat flea were reared with artificial diet and white mouse respectively.The process of larva pupation and adult emergence were recorded,and the sex ratio was calculated during the flea development.

用人工饲料和小白鼠分别喂饲印鼠客蚤的幼虫和成蚤，在饲养过程中记录幼虫的化蛹和羽化过程，并鉴别羽化成蚤的性别。

Yolk sac larva Developmental stage of a fish larva characterised by the presence of a yolk sac ventrally in the gut region.

卵黄囊幼体鱼幼体的发育阶段特徵，描述在消化道区域腹部有一个卵黄囊。

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 split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。