寄主

An obligate parasite such as potato blightcan live only in association with a host. whereas a facultative parasite such as the damping-off funguscan exist in other ways,for example as a saprophyte.

专性寄生的如马铃薯晚疫病只有与寄主共生，而兼性寄生的如立枯病就可以以其他方式存活，比如腐生生物。

In order to control dayflower application SYAU-06 strain successfully required mycelial suspensions concentration of 1.0×10~6 mL~(-1),7-9 days of culture time,3 leaf stag of host,28-32℃of temperature,over 80%relative humidity and at least 48h dew duration.

利用草茎点霉SYAU-06菌株成功控制鸭跖草危害，菌丝体的接种浓度要高于10~7mf·mL~(-1)，培养时间控制在7-9d，寄主植物鸭跖草处于3叶期前。

The research included host range,biological characteristics,infection process and infection influence factors of SYAU-06 strain as well as the herbicidal activity,extraction technology,action mechanism,biological safety,separation and purification technology and structure elucidation of phytoxin produced by the strain.The experiment provided a new method to biocontrol dayflower.

通过对SYAU-06活体菌株的寄主范围、生物学特性、侵染过程、侵染影响因子和毒素的除草活性、提取工艺、作用机理、生物安全性、分离提纯技术研究以及结构解析，从活体菌株和毒素两个方面系统评价了SYAU-06菌株防除鸭跖草的潜力，为鸭跖草的生物防治提供新的方法和思路。1。

The test of host range showed SYAU-06 strain was safe to eighteen species of crops and vegetable besides corn and sorghum had slight injury response.Among twenty-seven species weeds from fourteen family the dayflower was most sensitive to the fungi,redroot amaranth and emarginated amaranth was slightly sensitive as well as goosefoot.

SYAU-06菌株寄主范围测试表明在供试的7科18种大田作物和蔬菜中仅玉米和高粱叶片有轻微的伤害反应，在供试的14科27种杂草中，对鸭跖草高度敏感，对苋科的反枝苋、凹头苋和藜科的藜轻度敏感。

Feeding on the same host plants, the diapause incidence on old, diseased and young leaves were 69 7%, 55 3% and 20% respectively.

在相同寄主叶片上，病叶和老叶诱导的滞育率比嫩叶高，分别为69.7%、55.3%和20%。

Since the plasmid is capable of independent replication in host cells of many dicotyledonous plants, it has been used as a cloning vector in GNETIC ENGINEERING.

在许多双子叶植物中质粒在寄主细胞中是独立的复制单元，所以可以在基因工程中用作克隆载体。

Disease-producing bacteria develop normally within the tissues of an infected host.

致病的细菌通常在罹病的寄主的组织里发展。

Dodder can reduce agricultural productivity and can render a seed crop unmarketable since it's hard to separate it from its host plant.

菟丝子会使农业减产，还会使种子作物滞销，因为很难将其与寄主作物分开。

Bactrocera dorsalis is one of 5 kinds of agricultural pests with the strongest destructiveness in Southeast Asia.And it is also one of important quarantine pests in the world.It has wide hosts,high productivity,strong adaptability and great damage.

东方果实蝇是东南亚地区最具毁灭性的5种农业害虫之一，也是世界上重要的检疫害虫之一，其寄主范围广、繁殖力高、适应能力强且危害程度大。

Oriental fruit fly Bactrocera dorsalis is one of the dangerous quarantine pests of the world. Its hosts range is very so wide that it can harm more than 250 species fruits and vegetables. With the change of climate, adjustment of plant structure and increase of international trade, the area that has been harmed by oriental fruit fly is increasing.

桔小实蝇Bactrocera dorsalis 是一种世界危险性检疫害虫，寄主范围广，能危害250多种瓜果蔬菜，随着气候变化、种植结构的调整和国际贸易的增加，其危害面积逐渐扩大，给果蔬业带来严重的经济损失。

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。