虱

This study is of great importance in realizing the basic laws about the population forming and developing of the two planthoppers. It also gives the theorical basis for analyzing and forecasting the population dynamics of the two planthoppers under the commensalism condition.

本研究对深入认识水稻混作区的两种飞虱种群发生与发展的基本规律具有重要意义，亦为分析与预测两种飞虱在共栖条件下的种群动态提供了依据，还为全面理解稻飞虱的致害性做了一定深度的探讨。

Infestation with lice, especially crab lice; pediculosis.

虱病虱子的寄生侵扰，尤指毛虱；虱病

Bemisia tabaci Gennadius (Homoptera: Aleyrodidae) is a worldwide agriculturalpest. It is an omnivorous insect which has a very broad host range and complicatedhost-preference biotypes from different populations.

烟粉虱Bemisia tabaci Gennadius隶属同翅目、粉虱科、小粉虱属，其食性杂、寄主范围广，并存在复杂的寄主专化现象，是一种世界性的农业害虫。

Walchia ewingi Fuller（66.2%）, Laelaps turkestanicus Lange（38.5%）, Paradoxopsyllus custodies Jordan（42.9%）and Hoplopleura pacifica （80.1%）were the most predominant species of chigger mites, gamasid mites, fleas, and sucking lice, respectively.

攸氏无前恙螨为优势恙螨种，占恙螨总数的66.2%(710/1 072)；土尔克厉螨为优势革螨种，占革螨总数的38.5%（396/1 029）；绒鼠怪蚤为优势蚤种，占蚤总数的42.9%（9/21）；太平洋甲胁虱为优势吸虱种，占吸虱总数的80.1%（217/271）。

We drawn the predicted surface maps with the Ordinary Kriging method and illustrated in the time order to provide a visible presentation of the spatio-temporal distributions. By analyzing those maps, we found that the spatial distribution of spiders in the paddy field was similar to that of macropterous SBPH and larval SBPH, and was more similar to larval SBPH, and showed an obvious pursuing phenomenon between them, while the pursuing had a close relationship with the temporal dynamics of SBPH number. But the pursuing phenomenon was complex and influenced by factors such as the weather, the environmental conditions in paddy fields, other enemies of SBPH and other foods of spiders.

用普通克立格方法作出空间分布图，在时间序列上进行比较分析，得出稻田蜘蛛与灰飞虱成若虫的空间分布均有相似性，尤其与若虫相似性更强，表现出比较明显的空间跟随现象，且空间跟随现象与灰飞虱虫量的消长有密切的关系，但是由于天气、稻田环境、灰飞虱其他天敌以及蜘蛛其他猎物的存在等因素的影响使得其空间跟随又有着相当的复杂性。

There was a stable and relatively low expression level for Lbα1 and a progressive expression pattern for Lbα8 among the 1st,2nd,3rd,and 4th nymphal stages.5 Development and reproduction of L.decolor as a function of temperatureThe developmental rate,survival,intrinsic rate of increase,net reproductive rate(R_0),mean generation time,and population doubling time of L.decolor population were evaluated at eight constant temperatures.

Lb a1在1龄、2龄、3龄、4龄若虫及成虫中的表达水平分别是Lb a8的2.03、2.55、4.77、6.54、和5.28倍，且它们之间的差异均达到显著水平(P＜0.05)。5温度对无色书虱发育和繁殖的影响通过比较无色书虱在不同温度条件下的发育速率、存活率、内禀增长率等生命参数以明确无色书虱在不同温度条件下的发生发展规律。

In contrast,the expression levels of Lb est2 in nymphal stages are lower than that in adult stage.2 Gene cloning of AChE and mRNA expression level in L.entomophila2.1 Gene cloning and sequence analysis of AChE in L.entomophilaTwo full length cDNA encoding AChE were cloned from L.entomophila by the methods of RT-PCR and RACE,named Le ace1(GenBank Accession No.:EU854149) and Le ace2GenBank Accession No.

CarE基因在不同发育阶段mRNA表达量的分析结果表明，Lb est1的表达量随着该虫生长发育的进行逐渐降低，至成虫期时表达水平最低；相反，L6 est2在若虫期表达水平较低，而在成虫期表达水平最高。2嗜虫书虱乙酰胆碱酯酶基因克隆及其mRNA表达水平研究2.1嗜虫书虱乙酰胆碱酯酶基因克隆及序列分析利用RT-PCR和RACE技术成功克隆获得嗜虫书虱2个AChE基在的全长序列，分别命名为Le ace1(GenBank登录号：EU854149)和Le ace2(GenBank登录号：EU854150)。

The synergism ratios of piperonyl butoxide to alpha-cypermethrin in these three strains were similar(about 20-fold), which suggested metabolic detoxification probably confers about 20-fold inherent resistance in the B-type whitefly, as PBO is a mixed function oxygenase and esterase inhibitor and glutathione S-transferase is not affinity to resistance in B. tabaci. The synergism ratio of triphenyl phosphate to alpha-cypermethrin in the NJ strain was 12-fold, which implied the synergism of PBO in the B-type whitefly is mainly due to inhibiting esterase activity.

增效试验表明PBO对这三个品系的增效作用均为20倍左右，因为在烟粉虱中PBO即是多功能氧化酶抑制剂，也是酯酶抑制剂，而谷胱甘肽S-转移酶与抗性无关，因此推断代谢酶在B型烟粉虱对高效氯氰菊酯的抗性发展中起到的相对作用可能为20倍左右，而且这种抗性是B型烟粉虱天生的；TPP对NJ品系的增效作用为12倍，说明PBO增效作用主要是由于抑制酯酶而引起的，即代谢抗性大部分由酯酶所贡献。

Seedbox Screening Technique was applied to evaluate the reactions of two parents and 98 BILs to BPH at the seedling stage, and the entries were graded on ratio of dead seedlings.

采用褐飞虱生物1型和生物2型的混合种群进行苗期集团鉴定，并以死苗率作为抗褐飞虱表型值，分析亲本和98个BILs的抗褐飞虱表现。

Sure, she may be just a small aquatic crustacean, but the female sea louse is No. 1 on our list and here's why. First, she's lured by the male into his bachelor burrow for mating where she discovers that she's actually in a harem with 25 other pregnant females!

的确，她可能不过是一种小型水生甲壳类动物，但是雌海虱高居榜首的原因如下：首先，她被雄性海虱骗入其单身洞穴交配时才发现，她只是其这只雄性海虱众多妻妾中的一员，还有其他25只已经怀孕的雌性海虱也在洞中！

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了