scholarly journals Derris elliptica (tuba root).

Author(s):  
Julissa Rojas-Sandoval

Abstract Derris elliptica is a large and fast-growing climber that is cultivated primarily across tropical regions of the world for its roots, which are used as fish poison and as the source of the natural insecticide rotenone. This species is adapted to a wide range of climates and soil types and spreads sexually by seed and vegetatively by stem fragments. It has successfully escaped from cultivation to become naturalized principally in disturbed areas and secondary forests. D. elliptica often behaves as an aggressive weed and, once established, climbs over other trees and shrubs forming a dense canopy that smothers vegetation, fences, forests, pastures, plantations and cultivated land. D. elliptica is now listed as invasive in Fiji, French Polynesia, Hawaii, Palau, Japan and Cuba.

2021 ◽  
Author(s):  
Fabiola Areces-Berazain

Abstract M. umbellata is a climbing weed widely distributed in tropical regions throughout the world. It is one of the commonest and most widespread species of Merremia. Due to its attractive yellow flowers, it has been introduced as an ornamental in several countries where has become naturalized. It is typically found in disturbed areas and as a weed in agricultural crops and plantations, but little is known about its environmental impact. The PIER website (PIER, 2016) lists it as invasive in Hawaii, Fiji, Micronesia, French Polynesia, New Caledonia and the Galápagos Islands, although regional floras and reports (see references in the distribution table) do not explicitly indicate so. It is also considered invasive in Cuba (Oviedo Prieto et al., 2012) and American Samoa (Speith and Harrison, 2012).


2020 ◽  
Author(s):  
Fabiola Areces-Berazain

Abstract M. umbellata is a climbing weed widely distributed in tropical regions throughout the world. It is one of the commonest and most widespread species of Merremia. Due to its attractive yellow flowers, it has been introduced as an ornamental in several countries where has become naturalized. It is typically found in disturbed areas and as a weed in agricultural crops and plantations, but little is known about its environmental impact. The PIER website (PIER, 2016) lists it as invasive in Hawaii, Fiji, Micronesia, French Polynesia, New Caledonia and the Galápagos Islands, although regional floras and reports (see references in the distribution table) do not explicitly indicate so. It is also considered invasive in Cuba (Oviedo Prieto et al., 2012) and American Samoa (Speith and Harrison, 2012).


2021 ◽  
Author(s):  
Julissa Rojas-Sandoval ◽  
Pedro Acevedo-Rodríguez ◽  
A. I. Popay

Abstract S. oleraceus is a common seed crop contaminant and has been carried either deliberately or accidentally by humans to almost every corner of the earth, where it invades mainly open and disturbed areas. It grows in a wide variety of environments on a wide range of substrates - roadsides, cultivated land, gardens, construction sites, sand dunes, logged or burned areas, on walls, mountain slopes, and near water. Once introduced to a new area the plants spread quickly because they grow and flower quickly and produce copious wind- and bird-dispersed seeds that germinate quickly in large numbers. They invade many cropped areas, especially among vegetable and winter crops. They are almost perfect 'designer weeds'. Additionally, this species has small light seeds which are easily dispersed by wind and water.


Author(s):  
C. Booth

Abstract A description is provided for Nectria cinnabarina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Many species including Ribes and Robinia. This species occurs on conifers and on a wide range of broad-leaved trees and shrubs. DISEASE: Coral spot fungus. Evidence supports the view that this species is a facultative parasite of considerable importance on blackcurrants (48, 3063); it occurs as the cause of cankers of Robinia (54, 1020) and may attack many other woody plants (55, 655). GEOGRAPHICAL DISTRIBUTION: It is very common and widespread in Northern Europe and has frequently been reported from temperate parts of the world, USA, Canada, Australia and New Zealand, and also from India and Hong Kong. TRANSMISSION: Because of the slimy nature of the conidia and the fact that they form a hard crust in dry weather, wind is not considered as important as water in their dispersal. Even the ascospores appear to be extruded or discharged only in moist weather (Jorgensen, 1952). Entry is usually through wounds or dead buds (47, 1181; 48, 3063).


2021 ◽  
Author(s):  
Julissa Rojas-Sandoval

Abstract L. crustacea is an herb including in the Global Compendium of Weeds where it is listed as environmental and agricultural weed (Randall, 2012). It has a wide distribution across tropical and subtropical regions of the world where it occurs in a wide range of wetland and some non-wetland habitats and is able to exploit anthropogenic habitats such as rice fields. Once established, this species has the potential to grow forming a mat up to 30 cm high. Currently, L. crustacea is listed as invasive in Hawaii, French Polynesia and Singapore (Wagner, 1999; Chong et al., 2009; Lansdown, 2011).


Servis plus ◽  
2016 ◽  
Vol 10 (2) ◽  
pp. 54-63 ◽  
Author(s):  
Олег Афанасьев ◽  
Oleg Afanasiev

Modern political map of the world has preserved many fragments of colonial empires, with various official political statuses. These areas, like any other, have their own tourist-recreational resources and attractive destinations that offer unique opportunities for tourists. The tourist potential of these political entities has not been studied both in the world and in the Russian science about tourism, in the domestic market of tourism they are unknown, and that’s why they are not in demand. However, these countries and territories are quite capable to compete with many well-known and “beaten” areas according to the quality of the service and the services, which they offer. The aim of this study was the attempt to develop methodology for comparative scoring evaluation of social-economic and recreational resources for 30 countries and dependent territories of the world. The relevance of this issue is due to current trends of growth of demand of consumers of tourist services at a unique, specific, safe and high-standard direction. Located away from mass tourist flows, or in the shadow of world-renowned destinations possessing significant recreational potential, dependent countries and territories may offer a fundamentally new tourism product for the domestic market. For comparative characteristics and evaluation of social-economic tourist and recreational resources of dependent countries the authors developed a scoring matrix that includes seven indicators, each of which is graded on a scale. According to the results of integrated assessment, all analyzed dependent countries and territories are united in five groups – ​with low, middle-low, medium, medium-high and high characteristics of touristrecreational resources. Almost all of the analyzed territories offer a wide range of tourist and entertainment services. Anguilla, Aruba, Bermuda, Puerto Rico, French Polynesia are different with particularly developed infrastructure.


2021 ◽  
Author(s):  
Julissa Rojas-Sandoval ◽  
Pedro Acevedo-Rodríguez

Abstract P. phaseoloides is a vigorous fast-growing vine included in the Global Compendium of Weeds (Randall, 2012) and listed as one of the most aggressive weeds invading moist habitats in tropical and subtropical regions (USDA-ARS, 2012). It spreads by seeds and by runners (i.e., stolons) which are structures that enable plants to multiply rapidly and colonize entire forests very fast. This species has been extensively introduced in tropical and subtropical region of the world to be used as forage for livestock, to control soil erosion, and as a soil improvement species (Skerman et al., 1991; Cook et al., 2005). P. phaseoloides has the potential to degrade other plants by smothering them under a solid blanket of leaves, by girdling woody stems and tree trunks, and by breaking branches or uprooting entire trees and shrubs by the strength of its weight. Currently, this species is classified as a "noxious weed" in the United States (USDA-NRCS,2012) and as an invasive species in Costa Rica, Ecuador, Puerto Rico and Pacific Islands including Hawaii, Fiji, French Polynesia, Niue and New Caledonia (Soria et al., 2002; Acevedo-Rodríguez and Strong, 2012; Chacón and Saborio, 2012; PIER, 2012).


2020 ◽  
Author(s):  
Julissa Rojas-Sandoval

Abstract Lathyrus odoratus is a fast-growing, annual herb native only to southwest Italy and Sicily, but widely introduced as an ornamental. The ability of this species to tolerate a wide range of habitats, including disturbed areas, roadsides, secondary forests, as well as natural forests, means that it has the potential to spread much further than it has to date. This species has a climbing or sprawling habit, and consequently, has the capability to displace native species. Currently it is considered invasive in New Zealand and 'possibly invasive' in the Dominican Republic. However, in its native range it is listed as Near Threatened, as it is subject to wild collection threat due to its commercial value.


GIS Business ◽  
2019 ◽  
Vol 14 (6) ◽  
pp. 597-606
Author(s):  
Dr. Maha Mustafa Omer Abdalaziz

The study aims at the technological developments that are taking place in the world and have impacted on all sectors and fields and imposed on the business organizations and commercial companies to carry out their marketing and promotional activities within the electronic environment. The most prominent of these developments is the emergence of the concept of electronic advertising which opened a wide range of companies and businessmen to advertise And to promote their products and their work easily through the Internet, which has become full of electronic advertising, and in light of that will discuss the creative strategy used in electronic advertising;


2020 ◽  
Vol 14 (3) ◽  
pp. 459-464
Author(s):  
Alevtina Vasilevna Kamitova ◽  
Tatyana Ivanovna Zaitseva

The paper reflects the specificity of the fundamental ideas of the artistic world of M. G. Atamanov, which includes a wide range of literary facts from the content level of the text of the works to their poetics. A particularly important role in the works of M. G. Atamanov is played by cross-cutting themes and images that reflect the author's individual style and his idea of national-ethnic identity. The subject of the research is the book of essays “Mon - Udmurt. Maly mynym vös’?” (“I am Udmurt. Why does it hurt?”), which most vividly reflected the main spiritual and artistic searches of M. G. Atamanov, associated with his ideas about the Udmurt people. The main motives and plots of the works included in the book under consideration are accumulated around the concept of “Udmurtness”. The comprehension of “Udmurtness” is modeled in his essays through specific leit themes: native language, Udmurt people, national culture, mentality, geographic and topographic features of the Udmurt people’ places of residence, the Orthodox idea. The “Udmurt theme” is recognized and comprehended by the writer through the prism of national identity.


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