scholarly journals Nonpathogenic Isolates of the Citrus Black Spot Fungus, Guignardia citricarpa, Identified as a Cosmopolitan Endophyte of Woody Plants, G. mangiferae (Phyllosticta capitalensis)

2002 ◽  
Vol 92 (5) ◽  
pp. 464-477 ◽  
Author(s):  
R. P. Baayen ◽  
P. J. M. Bonants ◽  
G. Verkley ◽  
G. C. Carroll ◽  
H. A. van der Aa ◽  
...  

The population structure of Guignardia citricarpa sensu lato (anamorph: Phyllosticta citricarpa), a fungus of which strains pathogenic to citrus are subject to phytosanitary legislation in the European Union and the United States, was investigated. Internal transcribed spacer sequences revealed two phylogenetically distinct groups in G. citricarpa. This distinction was supported by amplified fragment length polymorphism analysis that also supported the exclusion of two isolates that had apparently been misclassified as G. citricarpa. On cherry decoction agar, but not on other media, growth rates of group I isolates were lower than those of group II isolates. Conidial dimensions were similar, but group I isolates formed conidia with barely visible mucoid sheaths, whereas those of group II formed conidia with thick sheaths. Cultures of isolates belonging to group I produced rare infertile perithecia, whereas fertile perithecia were formed by most isolates of group II. Colonies of isolates belonging to group I were less dark than those of group II, with a wider translucent outer zone and a lobate rather than entire margin. On oatmeal agar, exclusively group I isolates formed a yellow pigment. Group I harbored strains from citrus fruits with classical black spot lesions (1 to 10 mm in diameter) usually containing pycnidia. Group II harbored endophytic strains from a wide range of host species, as well as strains from symptomless citrus fruits or fruits with minute spots (<2-mm diameter) without pycnidia. These observations support the historic distinction between slowly growing pathogenic isolates and morphologically similar fast-growing, nonpathogenic isolates of G. citricarpa. The latter proved to belong to G. mangiferae (P. capitalensis), a ubiquitous endophyte of woody plants with numerous probable synonyms including G. endophyllicola, G. psidii, P. anacardiacearum, and P. theacearum. G. mangiferae occurs in the European Union and the United States on many host species including citrus, and does not cause symptoms of citrus black spot, justifying its exclusion from quarantine measures.

Author(s):  
Attarid Awadh Abdulhameed

Ukrainia Remains of huge importance to Russian Strategy because of its Strategic importance. For being a privileged Postion in new Eurasia, without its existence there would be no logical resons for eastward Expansion by European Powers.  As well as in Connection with the progress of Ukrainian is no less important for the USA (VSD, NDI, CIA, or pentagon) and the European Union with all organs, and this is announced by John Kerry. There has always ben Russian Fear and Fear of any move by NATO or USA in the area that it poses a threat to  Russians national Security and its independent role and in funence  on its forces especially the Navy Forces. There for, the Crisis manyement was not Zero sum game, there are gains and offset losses, but Russia does not accept this and want a Zero Sun game because the USA. And European exteance is a Foot hold in Regin Which Russian sees as a threat to its national security and want to monopolize control in the strategic Qirim.


2019 ◽  
Vol 22 (2) ◽  
pp. 74-79
Author(s):  
Nargiza Sodikova ◽  
◽  
◽  

Important aspects of French foreign policy and national interests in the modern time,France's position in international security and the specifics of foreign affairs with the United States and the European Union are revealed in this article


2016 ◽  
pp. 26-46
Author(s):  
Marcin Jan Flotyński

The global financial crisis in 2007–2009 began a period of high volatility on the financial markets. Specifically, it caused an increased amplitude of fluctuations of the level of gross domestic products, the level of investment and consumption and exchange rates in particular countries. To address the adverse market circumstances, governments and central banks took actions in order to bolster the weakening global economy. The aim of this article is to present the anti-crisis actions in the United States and selected member states of the European Union, including Poland, and an assessment of their efficiency. The analysis conducted indicates that generally the actions taken in the United States in response to the crisis were faster and more adequate to the existing circumstances than in the European Union.


Author(s):  
Francesco Giumelli ◽  
Michal Onderco

Abstract While the current practice of the United Nations Security Council, the European Union, and the United States leans towards imposing only targeted sanctions in most of the cases, private actors often complain about inability to process financial transactions, ship goods, or deliver services in countries where sanctions targets are located. The impact of sanctions often ends up being widespread and indiscriminate because sanctions are implemented by for-profit actors. This article investigates how for-profit actors relate to the imposition of sanctions, how they reflect them in their decisions, and how they interact with the public authorities. The findings of our research show that for-profit actors, with the possible exception of the largest multinationals, do not engage with public authorities before the imposition of sanctions. The behaviour of for-profit actors in the implementation phase is in line with the assumption of firms and business as profit-maximisers. Weighting the profits from business against the costs of (non-)compliance and make the decisions that in their view maximise their profit. Indeed, de-risking seems to be the most common approach by the companies due to the uncertainties produced by the multiple and overlapping sanctions regimes imposed by the United Nations, the European Union, and the United States.


Sign in / Sign up

Export Citation Format

Share Document