全文获取类型
收费全文 | 55篇 |
免费 | 0篇 |
专业分类
林业 | 1篇 |
农学 | 4篇 |
18篇 | |
综合类 | 9篇 |
农作物 | 3篇 |
水产渔业 | 1篇 |
畜牧兽医 | 9篇 |
园艺 | 3篇 |
植物保护 | 7篇 |
出版年
2023年 | 1篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 1篇 |
2017年 | 3篇 |
2016年 | 1篇 |
2015年 | 3篇 |
2014年 | 1篇 |
2013年 | 1篇 |
2012年 | 4篇 |
2011年 | 3篇 |
2010年 | 4篇 |
2009年 | 1篇 |
2008年 | 7篇 |
2007年 | 1篇 |
2006年 | 4篇 |
2005年 | 2篇 |
2004年 | 1篇 |
2003年 | 7篇 |
2002年 | 2篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
排序方式: 共有55条查询结果,搜索用时 15 毫秒
51.
Martijn F. Schenk Roel Hamelink René A. A. van der Vlugt Adriaan M. W. Vermunt Ruud C. Kaarsenmaker Ineke C. C. M. M. Stijger 《European journal of plant pathology / European Foundation for Plant Pathology》2010,127(2):249-261
Pepino mosaic virus (PepMV) has recently emerged as a highly infectious viral pathogen in tomato crops. Greenhouse trials
were conducted under conditions similar to commercial tomato production. These trials examined whether tomato plants can be
protected against PepMV by a preceding infection with an attenuated isolate of this virus. Two potential attenuated isolates
that displayed mild leaf symptoms were selected from field isolates. Two PepMV isolates that displayed severe leaf symptoms
were also selected from field isolates to challenge the attenuated isolates. The isolates with aggressive symptoms were found
to reduce bulk yields by 8 and 24% in single infections, respectively. Yield losses were reduced to a 0–3% loss in plants
that were treated with either one of the attenuated isolates, while no effects were observed on the quality of the fruits.
After the challenge infection, virus accumulation levels and symptom severity of the isolates with aggressive symptoms were
also reduced by cross-protection. Infection with the attenuated isolates alone did neither affect bulk yield, nor quality
of the harvested tomato fruits. 相似文献
52.
Recent developments in the molecular discrimination of formae speciales of Fusarium oxysporum 总被引:1,自引:0,他引:1
Rapid and reliable detection and identification of potential plant pathogens is required for taking appropriate and timely disease management measures. For many microbial species of which all strains generally are plant pathogens on a known host range, this has become quite straightforward. However, for some fungal species this is quite a challenge. One of these is Fusarium oxysporum Schlechtend:Fr., which, as a species, has a very broad host range, while individual strains are usually highly host-specific. Moreover, many strains of this fungus are non-pathogenic soil inhabitants. Thus, with regard to effective disease management, identification below the species level is highly desirable. So far, the genetic basis of host specificity in F. oxysporum is poorly understood. Furthermore, strains that infect a particular plant species are not necessarily more closely related to each other than to strains that infect other hosts. Despite these difficulties, recently an increasing number of studies have reported the successful development of molecular markers to discriminate F. oxysporum strains below the species level. 相似文献
53.
Riggs Rebecca Anne Achdiawan Ramadhani Adiwinata Ani Boedhihartono Agni Klintuni Kastanya Agustinus Langston James Douglas Priyadi Hari Ruiz-Pérez Manuel Sayer Jeffrey Tjiu Albertus 《Landscape Ecology》2021,36(8):2409-2426
Landscape Ecology - In recent years, landscape sustainability, the maintenance and improvement of biodiversity, ecosystem services, and human well-being in landscapes, has become a core objective... 相似文献
54.
Efficient bipedal robots based on passive-dynamic walkers 总被引:1,自引:0,他引:1
Passive-dynamic walkers are simple mechanical devices, composed of solid parts connected by joints, that walk stably down a slope. They have no motors or controllers, yet can have remarkably humanlike motions. This suggests that these machines are useful models of human locomotion; however, they cannot walk on level ground. Here we present three robots based on passive-dynamics, with small active power sources substituted for gravity, which can walk on level ground. These robots use less control and less energy than other powered robots, yet walk more naturally, further suggesting the importance of passive-dynamics in human locomotion. 相似文献
55.