scholarly journals Eranthemum pulchellum (blue-sage).

Author(s):  
Manuel Angel Duenas-Lopez

Abstract Eranthemum pulchellum is an evergreen shrub with a native range across South and South-East Asia. It has been introduced as an ornamental plant in tropical and subtropical countries. It is widely cultivated in the tropics and will occasionally escape from cultivation. It is naturalized in Queensland, Australia, but there is no clear evidence of naturalization elsewhere. There is no evidence of any impacts it its introduced range and it is not considered to be an invasive species.

2021 ◽  
Author(s):  
Alejandro Cubiñá

Abstract Leptochloa mucronata is a grass native to the warmer parts of North, Central and South America and the Caribbean; taxonomists disagree over whether the form found in the Caribbean is part of the same species or should be classified separately as Leptochloa panicea ssp. brachiata. The species is present in a number of countries in south and south-east Asia, in a few countries in Africa, and in Australia; in most of these countries it is considered to be introduced, although it is reported as native in some of them. Little information is available about how it was spread, but it probably involved the accidental movement of seeds. In parts of both its native range and its introduced range it is a significant agricultural weed, and this is the main reason why it is of interest, although there have been some studies of its use as a green manure.


2020 ◽  
Author(s):  
Alejandro Cubiñá

Abstract Leptochloa mucronata is a grass native to the warmer parts of North, Central and South America and the Caribbean; taxonomists disagree over whether the form found in the Caribbean is part of the same species or should be classified separately as Leptochloa panicea ssp. brachiata. The species is present in a number of countries in south and south-east Asia, in a few countries in Africa, and in Australia; in most of these countries it is considered to be introduced, although it is reported as native in some of them. Little information is available about how it was spread, but it probably involved the accidental movement of seeds. In parts of both its native range and its introduced range it is a significant agricultural weed, and this is the main reason why it is of interest, although there have been some studies of its use as a green manure.


2005 ◽  
Vol 86 (1) ◽  
pp. 1-11 ◽  
Author(s):  
LAURENCE MOUSSON ◽  
CATHERINE DAUGA ◽  
THOMAS GARRIGUES ◽  
FRANCIS SCHAFFNER ◽  
MARIE VAZEILLE ◽  
...  

Aedes (Stegomyia) aegypti (L.) and Aedes (Stegomyia) albopictus (Skuse) are the most important vectors of the dengue and yellow-fever viruses. Both took advantage of trade developments to spread throughout the tropics from their native area: A. aegypti originated from Africa and A. albopictus from South-East Asia. We investigated the relationships between A. aegypti and A. albopictus mosquitoes based on three mitochondrial-DNA genes (cytochrome b, cytochrome oxidase I and NADH dehydrogenase subunit 5). Little genetic variation was observed for A. albopictus, probably owing to the recent spreading of the species via human activities. For A. aegypti, most populations from South America were found to be genetically similar to populations from South-East Asia (Thailand and Vietnam), except for one sample from Boa Vista (northern Amazonia), which was more closely related to samples from Africa (Guinea and Ivory Coast). This suggests that African populations of A. aegypti introduced during the slave trade have persisted in Boa Vista, resisting eradication campaigns.


Parasitology ◽  
2002 ◽  
Vol 124 (7) ◽  
pp. 137-151 ◽  
Author(s):  
M. E. TORCHIN ◽  
K. D. LAFFERTY ◽  
A. M. KURIS

Introduced marine species are a major environmental and economic problem. The rate of these biological invasions has substantially increased in recent years due to the globalization of the world's economies. The damage caused by invasive species is often a result of the higher densities and larger sizes they attain compared to where they are native. A prominent hypothesis explaining the success of introduced species is that they are relatively free of the effects of natural enemies. Most notably, they may encounter fewer parasites in their introduced range compared to their native range. Parasites are ubiquitous and pervasive in marine systems, yet their role in marine invasions is relatively unexplored. Although data on parasites of marine organisms exist, the extent to which parasites can mediate marine invasions, or the extent to which invasive parasites and pathogens are responsible for infecting or potentially decimating native marine species have not been examined. In this review, we present a theoretical framework to model invasion success and examine the evidence for a relationship between parasite presence and the success of introduced marine species. For this, we compare the prevalence and species richness of parasites in several introduced populations of marine species with populations where they are native. We also discuss the potential impacts of introduced marine parasites on native ecosystems.


1956 ◽  
Vol 47 (4) ◽  
pp. 655-667 ◽  
Author(s):  
K. G. Smith

A summary is made of the literature dealing with the bionomics of Aphomia gularis (Zell.), a storage pest of almonds, walnuts, groundnuts and prunes, and to a lesser extent of rice and grain. Additional information is also given on its habits and occurrence in Britain.An outline is given of its origins, introduction and establishment in various parts of the world. The evidence leaves little doubt that the species originated in south-east Asia, its occurrence elsewhere being, with few exceptions, confined to the major ports of western Europe and North America. Cases of the spread of the pest from south-east Asia can be traced to the export of infested goods from that area. Unless action is taken to prevent further dispersal and measures applied to wipe out the known centres of infestation, further establishment of this species can be expected in countries at present not affected.It would appear that A. gularis is a subtropical and warm-temperate species, rarely found in the tropics and only able to maintain itself towards the northerly limits of its range, as in northern Britain and Sweden, in heated premises. In the cooler temperate regions, such as Britain, it cannot compete with such species as Ephestia elutella (Hb.) while in the tropics its ecological niche is filled by the very closely related species Corcyra cephalonica (Stnt.).Its apparent absence from regions in the southern hemisphere, where conditions favourable for development exist, may be due to its presence not having yet been recognised.


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

Abstract C. javanica is an attractive small tree with widely spreading branches and showy, bright-pink blossoms. It is native to South-East Asia and is widely planted throughout the tropics as an ornamental and roadside tree, and has become naturalized in numerous tropical countries. C. javanica is very polymorphic and several subspecies have been distinguished. This is the only Cassia species with valuable timber. The wood is used for general construction, furniture and cabinet making. It is a leguminous species, fairly drought tolerant and coppices vigorously. The tree also has promise for the tannin industry. Due to the species' considerable potential, further research into its silvicultural management is warranted.


2005 ◽  
Vol 51 (1) ◽  
pp. 71-80 ◽  
Author(s):  
Trond Hofsvang ◽  
Berit Snøan ◽  
Arild Andersen ◽  
Heidi Heggen ◽  
Le Ngoc Anh

Agrologia ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Muhamad Riadh Uluputty

Eggplant (Salonum melongena L) is a native plant of the tropics, this plant originated from South East Asia, including Indonesia. Eggplant plants including one family with pepper, tomatoes, and potatoes. These plants belong to one group of seed plants that produce seeds and crops a year are shaped shrubs. purpose of this study is menginvertarisasi the types of weeds present in the planting eggplant  in  Wanakarta Village District of Waeapo. The results showed that weed found in eggplant planting area in the Wanakarta Village of Waeapo District no types namely Cyperus rotundus (L), Cyperus kyllingia, Eulisina indica (L), Drymaria cordata (L), Mimosa pudica (L) and Amaranthus spinosus. Density and dry weight Nisbih types nisbih highest species is Cyperus rotundus L is equal to 30.27% and 58.79%, while the frequency nisbih weed species is the same for all types ie 16.67%


2020 ◽  
Author(s):  
Eduardo A. Ventosa-Febles ◽  
Nicole Cordero-Ramos

Abstract Polyalthia suberosa is a shrub or small tree, native to south and south-east Asia. It has been introduced widely in tropical counties as a cultivated ornamental plant (it also has medicinal properties). In the New World it is present in the wild in Florida, Hawaii and Cuba; in the latter country it is classified as invasive, but there appears to be no information about any adverse effects that it may have.


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