寄主

The results showed that the spatial distribution patterns of cochineal in cactus belonged to aggregation distribution, the basic component of distribution was individual population, the probability distribution was in accorded with negative binomial and the cochineal mainly distributed the second and third stem in cactus.

结果表明，该虫在寄主仙人掌茎片上的空间分布型属于聚集分布，分布的基本成分是个体群，概率分布符合负二项分布，主要分布在仙人掌的第2和第3级茎片上。

When the larvae were fed with Apricot and apple-pear the death rate of the larvae increased,the larval and pupa stages prolonged, the pupa weight decreased, female adult life shortened and the average fecundity.The age-specific life table of codling moth indicated that the trend index of codling moth population fed on Jonathan apple, Red Delicious apple, Zhangye number two apple, Chinese pear-leaved crab-apple and Crisp pear were more than one. Experiment population quantity was at the growth condition. The trend index of codling moth population fed on Apple-pear and Apricot were less than one.

通过不同寄主植物饲养条件下苹果蠹蛾特定年龄生命表的分析可知，取食沙果、早酥梨、红玉苹果、红元帅苹果和张掖2号苹果的苹果蠹蛾实验种群的种群趋势指数均大于1，实验种群数量处于增长状态，而当苹果蠹蛾取食苹果梨和杏时，其种群趋势指数小于1，下代种群(来源：Ab9b9BC论文网www.abclunwen.com)数量不断减少。

Not all coevolution between host and parasite is escalatory, however.

但是，寄主与寄生物之间的协同进化并不都是提高性的。

The close association between parasites and their hosts often results in evolutionary interactions, or coevolution.

寄生物与其寄主间紧密的关联经常导致二者在进化上的相互作用，或协同进化。

Pathogens were isolated from diseased leaves of Atractylodes in Xiaochang county of Hubei province. Firstly, we pathogenicity test was conducted based on Kochs rule. Secondly, we described the morphological characteristics of the conidia, conidiophore and beak of the pathogens growing on diseased leaf land PCA.

从湖北省孝昌县苍术种植基地的发病植株叶片上分离得到菌株，根据柯赫氏法则对分离自发病叶片的菌株进行致病性测定，然后描述了寄主发病叶片以及PCA培养基上分生孢子、分生孢子梗及喙的形态，测量其大小，观察分生孢子链的形状。

The convexity of the seed capsule is of decisive importance in host selection.

种子囊的突起对寄主的选择起着决定性的作用。

Genes encoding the type III secretion system and effectors are coordinately activated by an undefined host signal.

编码三型分泌系统及其效应因子的基因受未知的寄主信号激活而表达。

Cyrtorrhinus lividipennis is a vital predator of planthoppers in rice fields, The life table of experimental population of C. lividipennis, rearing on replacement prey Corcyra cephalonica eggs was improved.

采用指形管单头饲养的方法，编制了稻飞虱的重要捕食性天敌黑肩绿盔盲蝽取食替代寄主米蛾卵的实验种群生命表。

The origin analysis on the source of hosts and terrains was carried out on the base of homology tree and phylogenetic tree founded in 19 isolates on their CP gene nucleotide sequences. The result showed that the gene types and clusters of Cucumber green mottle mosaic virus were not obviously related to the two factors.

对包括该分离物在内的19个CP基因核苷酸序列进行同源性比较和系统进化树构建，并结合寄主来源及地域来源进行LHP的起源分析，结果表明黄瓜绿斑驳花叶病毒不同分离物的序列分群和进化关系与上述两个因素无明显关系。

Three kinds of virus were fand on Gladiolus in Shenyang. They were cucumber mosaic virus, bean yellow mosaic virusand tobacco mosaic virus.

阐明了染病寄主的症状与病毒毒原种类的相关性，在典型症状中，碎色症和斑驳症的植株多为受CMV侵染造成，条斑症和皱叶症主要是由BYMV侵染引起。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。