全文获取类型
| 收费全文 | 104篇 |
| 免费 | 7篇 |
| 国内免费 | 1篇 |
专业分类
| 林业 | 4篇 |
| 农学 | 2篇 |
| 5篇 | |
| 综合类 | 19篇 |
| 农作物 | 4篇 |
| 水产渔业 | 9篇 |
| 畜牧兽医 | 38篇 |
| 植物保护 | 31篇 |
出版年
| 2024年 | 3篇 |
| 2023年 | 5篇 |
| 2022年 | 2篇 |
| 2021年 | 6篇 |
| 2020年 | 4篇 |
| 2019年 | 7篇 |
| 2018年 | 4篇 |
| 2017年 | 5篇 |
| 2016年 | 2篇 |
| 2015年 | 3篇 |
| 2014年 | 6篇 |
| 2013年 | 13篇 |
| 2012年 | 10篇 |
| 2011年 | 5篇 |
| 2010年 | 4篇 |
| 2009年 | 2篇 |
| 2008年 | 3篇 |
| 2007年 | 4篇 |
| 2006年 | 2篇 |
| 2005年 | 2篇 |
| 2003年 | 2篇 |
| 2002年 | 2篇 |
| 2001年 | 5篇 |
| 2000年 | 1篇 |
| 1999年 | 3篇 |
| 1998年 | 1篇 |
| 1997年 | 2篇 |
| 1996年 | 2篇 |
| 1991年 | 1篇 |
| 1987年 | 1篇 |
排序方式： 共有112条查询结果，搜索用时 0 毫秒
71.
C. C. F. M. Schrijnwerkers N. Huijberts L. Bos 《European journal of plant pathology / European Foundation for Plant Pathology》1991,97(3):187-191
In 1983 and 1987/88 two limited outbreaks of zucchini yellow mosaic virus in cucumber and zucchini squash occurred in the Westland glasshouse district in the Netherlands, mainly in glasshouses. The disease could be eradicated and has not recurred so far. In both cases a relatively mild but still highly pathogenic strain of the virus was involved. Diseased plants of zucchini yielded severely distorted or no fruits and it was difficult to obtain seeds from infected plants. Two out of 4196 seedlings grown in isolation from seed from inoculated zucchini plants showed symptoms and contained the virus, indicating that the virus can be transmitted via seed but at very low rate. This explains the erratic incidence and international distribution of the virus. 相似文献
72.
R.H. Scheffrahn H.H. Hochmair W.H. Kern Jr J. Warner J. Krecek B. Maharajh 《国际虫害防治杂志》2014,60(1):9-21
Populations of the arboreal termite, Nasutitermes corniger, discovered in Dania Beach, Florida in 2001 were surveyed and treated for eradication, beginning in 2003. Most N. corniger nest locations were cryptic and some nests contained over 1 million termites. Field efficacy of fipronil (Termidor® SC) and imidacloprid (Premise® 2) were compared in initial treatments, and fipronil was selected for termite-active sites through 2010. In 2006, expanded survey work was discontinued. By 2010 all sites within the original survey area were termite-free. In 2011, a new population of N. corniger was discovered beyond the original 2003 infested tracts. A new (2011–2012) survey revealed a total of four areas outside the original tracts that were infested with N. corniger. No tract treated with fipronil between 2003 and 2010 showed evidence of renewed termite activity in 2011–2012. New application procedures using nest-only and fipronil dust treatments were instituted in May 2012. Live termites were still found within the 2011–2012 treatment area as of November 2013. Very slow but continued spread of N. corniger in tropical urban Florida will have economic consequences as a result of nuisance and structural damage. 相似文献
73.
74.
苏皖地区规模化鸡场禽白血病净化的初步研究 总被引：2，自引：0，他引：2
基于苏皖地区禽白血病(AL)流行病学调查结果,本研究参考国际AL净化方案,针对该病在苏皖地区的流行特点,选择代号为DYAH91和DYJS31的两个规模化地方品系鸡群开展了禽白血病净化初步研究。经过一个世代的净化更替,DYAH91鸡群p27抗原阳性率由14.4%下降到8.1%,p27抗体阳性率由3.4%下降到1.0%,A/B亚群抗体阳性率由5.7%下降到2.2%,病毒分离阳性率由3.1%下降到0.45%;DYJS31鸡群,p27抗原阳性率由40.7%下降到2.8%,p27抗体阳性率由18.7%下降到3.3%,A/B亚群抗体阳性率由10.2%下降到1.4%,J亚群抗体由1.7%下降到1.4%,病毒分离阳性率由4.1%下降为0。以上结果表明通过净化程序的实施,鸡群ALV阳性率显著下降,净化方案效果确实。 相似文献
75.
P. BRANGAN D. C. BAILEY J. F. LARKIN T. MYERS S. J. MORE 《Equine veterinary journal》2008,40(7):702-704
76.
U. Braun S.F. Reichle C. Reichert M. Hässig H.P. Stalder C. Bachofen E. Peterhans 《Veterinary microbiology》2014
Bovine viral diarrhea- and Border disease viruses of sheep belong to the highly diverse genus pestivirus of the Flaviviridae. Ruminant pestiviruses may infect a wide range of domestic and wild cloven-hooved mammals (artiodactyla). Due to its economic importance, programs to eradicate bovine viral diarrhea are a high priority in the cattle industry. By contrast, Border disease is not a target of eradication, although the Border disease virus is known to be capable of also infecting cattle. In this work, we compared single dose experimental inoculation of calves with Border disease virus with co-mingling of calves with sheep persistently infected with this virus. As indicated by seroconversion, infection was achieved only in one out of seven calves with a dose of Border disease virus that was previously shown to be successful in calves inoculated with BVD virus. By contrast, all calves kept together with persistently infected sheep readily became infected with Border disease virus. The ease of viral transmission from sheep to cattle and the antigenic similarity of bovine and ovine pestiviruses may become a problem for demonstrating freedom of BVD by serology in the cattle population. 相似文献
77.
Hiroshi Tsunoda Yoshito Mitsuo Mitsuru Ohira Makie Doi Yutaro Senga 《水产资源保护:海洋与淡水生态系统》2010,20(7):710-716
- 1. The change in fish fauna was monitored in ponds within irrigation systems in Iwate prefecture, north‐eastern Japan to evaluate the effectiveness of eradicating the invasive piscivorous largemouth bass, Micropterus salmoides.
- 2. Eleven study ponds were categorized into three pond groups: bass‐dwelling (n=3), bass‐eradicated (n=3) and non‐invaded ponds (n=5).
- 3. Species richness and diversity, which temporally decreased in bass‐dwelling ponds, increased in bass‐eradicated ponds. Furthermore, in bass‐eradicated ponds, the mean numbers of topmouth minnow and freshwater goby were gradually restored, but in bass‐dwelling ponds the numbers decreased and both species eventually disappeared.
- 4. Although the eradication of piscivorous invaders is helpful for restoring fish species diversity in ponds, its effectiveness varies among species, and other alien fish such as the rose bitterling (Rhodeus ocellatus ocellatus) often invade and proliferate in the bass‐eradicated ponds.
- 5. To ensure successful restoration of native biota and avoid undesirable results, it is necessary to plan and implement continuous monitoring and adaptive management after eradication of alien predators. Copyright © 2010 John Wiley & Sons, Ltd.
78.
Daisuke Hayasaka Masayoshi K. Hiraiwa Yu Maebara Yugo Seko 《Journal of Pesticide Science》2022,47(4):208
Slow-acting fipronil is one of the best components for controlling invasive ants. However, its efficacy against invasive Lepisiota frauenfeldi, which recently invaded Japan, remains unclear. Here, its acute toxicity to Le. frauenfeldi was assessed, and its lethal concentrations were compared with those against other invasive ants (Linepithema humile and Solenopsis invicta). The LC10 and LC50 values of fipronil for Le. frauenfeldi were significantly lower than the previously reported values for Li. humile and/or S. invicta, and its LC90 value against Le. frauenfeldi was in the same range as that required for Li. humile extermination. Additionally, Le. frauenfeldi can be more sensitive to fipronil than non-target arthropods. Therefore, recent fipronil-based Li. humile and S. invicta eradication/control programs may be effective against Le. frauenfeldi as well. Moreover, applying fipronil at dosages appropriate for Le. frauenfeldi would lead to effective Le. frauenfeldi extermination/control with low damage to other native species/ants. 相似文献
79.
Hayes M Ashe S Collins D Power S Kenny K Sheahan M O'Hagan G More S 《Irish veterinary journal》2009,62(3):182-190
Since 1998, there has been a steady decline in herd restrictions and de-populations in Ireland due to bovine brucellosis. There is concern that the interpretation of laboratory results may become increasingly problematic, as brucellosis prevalence falls in Ireland. Therefore, the purpose of the current study was to evaluate the infection status of Irish herds and animals with inconclusive serological evidence of bovine brucellosis. During 12 months from September 1, 2004, laboratory and observational epidemiological data were collected from all Irish herds where animal testing identified at least one animal with a complement fixation test (CFT) reading greater than zero and/or a positive result to the indirect enzyme-linked immunosorbent assay (iELISA). Due to the observational nature of the study, we have robust estimates of the relative, but not the absolute, performance of the CFT, iELISA and brucellin skin test (BST). Herds were divided into three categories (Group A, B or C) on the basis of test results at initial assessment. A total of 639 herds were enrolled into the study, and observed for at least two years following enrolment. A rising CFT titre, with a CFT reading of 111 International CFT Units (IU) or greater at the subsequent blood test, was generally associated with herds where other evidence of infection was also available. Knowledge of the CFT reading at the initial and a subsequent blood test proved useful in distinguishing false-positive and true-positive brucellosis results. There was poor correlation between the CFT and iELISA results, and between the CFT and BST results. As a result of this study, national policy has been modified to include re-sampling of all animals with CFT readings of 20 IU or greater. This project has also led to a reduction in the number of herds restricted, as well as restriction duration. It has also contributed to a reduction in the number of herds listed for contiguous tests, and therefore the potential for contiguity testing of false positive results. 相似文献
80.
Periklis Kleitou Sian Rees Francesco Cecconi Demetris Kletou Ioannis Savva Leda L. Cai Jason M. Hall-Spencer 《水产资源保护:海洋与淡水生态系统》2021,31(10):2870-2882
- A lack of biosecurity in the Suez Canal has combined with global warming and other human pressures to cause abrupt changes in the Mediterranean Sea. Throughout this region an influx of species is influencing the outcome of efforts to protect and restore nature.
- Despite calls for targeted removals of invasive species from protected areas, there is limited information about the effectiveness of this course of action from both an ecological and a socio-economic perspective. In this study, coordinated removals of lionfish (Pterois miles) by volunteers/scuba divers at three marine protected sites in Cyprus were conducted.
- The removal efficiency was monitored using visual-census surveys and citizen science data. Removals significantly decreased lionfish numbers but long-term suppression of lionfish would require monitoring and repetition of removals when necessary, since population recovery was sometimes rapid.
- Citizen science yielded the data needed to understand lionfish population changes and guide the timing of removal events, but was characterized by large variation and potential outliers, highlighting the need for large sample sizes.
- Questionnaire surveys were used to assess the social impact of participation in lionfish removals; these showed that involvement had a strong positive impact on knowledge about lionfish and motivation to support marine conservation activities – the divers were even willing to pay extra to remove lionfish.
- Management reforms would be needed to capitalize on this societal motivation, and enable effective lionfish removals by scuba divers, coordinated by competent authorities. The EU aims to protect at least 30% of the marine waters by 2030. Removal events could help shield selected conservation sites from the adverse effects of lionfish and at the same time help establish links with local communities, strengthening the sustainable use of marine systems both at corporate and at societal levels.