Characterisation of Meloidogyne spp. (Tylenchida: Meloidogynidae) from coffee plantations in Central America and Brazil

Nematology ◽  
2004 ◽  
Vol 6 (2) ◽  
pp. 193-204 ◽  
Author(s):  
Adan Hernandez ◽  
Mireille Fargette ◽  
And Jean-Louis Sarah
Keyword(s):  
Costa Rica ◽  
El Salvador ◽  
Central America ◽  
Central American ◽  
Meloidogyne Hapla ◽  
Coffee Plantations ◽  
Meloidogyne Spp ◽  
Growing Conditions ◽  
Esterase Phenotype ◽  
Esterase Phenotypes

Abstract Isozymes (Esterases, MDH, SOD, GOT) and perineal patterns were studied in 29 isolates of Meloidogyne spp. collected on coffee (Coffea arabica) plantations in four Central American countries and on one isolate collected in Brazil. Five species were clearly diagnosed and six new multi-enzyme phenotypes were also revealed corresponding to within-species diversity or possible new species. Meloidogyne exigua was found in Costa Rica, Nicaragua and Honduras, M. arenaria in El Salvador and M. incognita ('M1a' esterase phenotype) in Brazil. Meloidogyne arabicida was found in Costa Rica and has a new esterase phenotype, 'M1F1b'. Nematodes with the 'F1' esterase phenotype were found in Guatemala and their specific status is discussed. Two isolates from El Salvador displayed unknown esterase phenotypes ('M1F1a' and 'Sa4'). One isolate from northern Guatemala was clearly identified as Meloidogyne hapla and another from the same area was related to M. enterolobii or M. mayaguensis. Neither of these latter isolates was able to develop in coffee roots under our growing conditions. The diversity of root-knot nematodes parasitising coffee roots in this region is discussed.

Pathogenicity of Meloidogyne spp. (Tylenchida: Meloidogynidae) isolates from Central America and Brazil on four genotypes of Coffea arabica

Nematology ◽  
2004 ◽  
Vol 6 (2) ◽  
pp. 205-213 ◽  
Author(s):  
Adan Hernandez ◽  
Mireille Fargette ◽  
Jean-Louis Sarah
Keyword(s):  
El Salvador ◽  
Central America ◽  
Coffea Arabica ◽  
Management Strategies ◽  
High Rate ◽  
Coffee Plantations ◽  
Wide Range ◽  
Meloidogyne Spp ◽  
Meloidogyne Sp ◽  
Low Rate

Abstract Fifteen isolates of Meloidogyne spp. collected from coffee plantations in every country in Central America, with one isolate from Brazil, were inoculated on two common cultivars (Catuai and Sarchimor) and two wild genotypes from Ethiopia (ET15 and ET28) of coffee (Coffea arabica) under controlled conditions. These isolates displayed a wide range of pathogenicity on the different varieties. Meloidogyne sp. 2 isolate esterase 'VS1S1' from Guatemala, was unable to multiply on any cultivar. All other isolates multiplied on cv. Catuai. The Meloidogyne incognita isolate from Brazil did not multiply on cv. Sarchimor or genotype ET28. Four Meloidogyne sp. 1 (esterase 'F1') isolates from Guatemala multiplied at relatively low rates on cv. Sarchimor, but did not multiply on genotypes ET15 and ET28. Meloidogyne arenaria and Meloidogyne sp. 3 (displaying the new esterase phenotype 'M1F1a'), both from El Salvador, multiplied at a high rate on cv. Sarchimor; M. arenaria multiplied at a low rate on genotype ET15, but did not multiply on genotype ET28. Meloidogyne sp. 3 multiplied at a low rate on genotype ET28. Meloidogyne sp. 4 from El Salvador (esterase 'Sa4') multiplied at a high rate on genotype ET15. The M. arabicida isolate from Costa Rica did not multiply at all on genotype ET15. All isolates of Meloidogyne exigua multiplied on cv. Sarchimor as well as on both Ethiopian genotypes. This new information highlights the great parasitic diversity of root-knot nematodes parasitising coffee in Central America, a diversity which must be taken into account when developing integrated pest management strategies and breeding for resistance to nematodes.

scholarly journals The Brachiacantha Dejean, 1837 (Coleoptera, Coccinellidae) of Central America

ZooKeys ◽  
2021 ◽  
Vol 1024 ◽  
pp. 157-196
Author(s):  
Jorge Ismael Nestor-Arriola ◽  
Víctor Hugo Toledo-Hernández ◽  
Ángel Solís ◽  
Guillermo González ◽  
Jaroslav Větrovec
Keyword(s):  
New Species ◽  
Costa Rica ◽  
El Salvador ◽  
Central America ◽  
Male Genitalia ◽  
New Records ◽  
Central American ◽  
Type Material ◽  
First Time ◽  
Central American Species

A revision of the Central American species of the genus Brachiacantha was undertaken to update the knowledge of the Central American species of the genus. Material of several collections was reviewed, using original descriptions and keys, and comparing with the type material. Twenty-five species of the genus Brachiacantha were found in Central American material, including nine new species: B. nubes Nestor-Arriola, Toledo-Hernández and Solís, sp. nov., B. dentata Nestor-Arriola, Toledo-Hernández and Solís, sp. nov., B. isthmena Nestor-Arriola, Toledo-Hernández and Solís, sp. nov., B. aurantiapleura Nestor-Arriola, Solís and Toledo-Hernández, sp. nov., B. invertita Nestor-Arriola, Toledo-Hernández and Solís, sp. nov., B. papiliona Nestor-Arriola, Toledo-Hernández and Solís, sp. nov., B. tica Nestor-Arriola, Toledo-Hernández and Solís, sp. nov., B. hexaspina González, Větrovec and Nestor-Arriola, sp. nov., and B. mimica Nestor-Arriola and Toledo-Hernández, sp. nov. Nomenclatural changes include Brachiacantha gorhami (Weise), comb. nov., B. guatemalensis (Gorham), comb. nov., and Brachiacantha duodecimguttata Leng, syn. nov. for B. lepida Mulsant. The male genitalia of the species B. fenestrata Gorhan, B. octostigma Mulsant, B. aperta Weise, and B. cachensis Gorhan are described and illustrated for the first time. New records include B. indubitabilis Crotch and B. bipartita Mulsant (Costa Rica and Guatemala), B. gorhami (Weise) (El Salvador), and B. cachensis Gorham (Panamá). A key to the species is included.

Radical, Reformist and Aborted Liberalism: Origins of National Regimes in Central America

2001 ◽  
Vol 33 (2) ◽  
pp. 221-256 ◽  
Author(s):  
JAMES MAHONEY
Keyword(s):  
Twentieth Century ◽  
Costa Rica ◽  
El Salvador ◽  
Central America ◽  
Political Development ◽  
Central American ◽  
Political Leaders ◽  
Reform Period ◽  
Liberal Reform ◽  
Progressive Democracy

During the twentieth century, the countries of Central America were characterised by remarkably different political regimes: military-authoritarianism in Guatemala and El Salvador, progressive democracy in Costa Rica and traditional-authoritarianism in Honduras and Nicaragua. This article explains these contrasting regime outcomes by exploring the agrarian and state-building reforms pursued by political leaders during the nineteenth- and early twentieth-century liberal reform period. Based on differences in the transformation of state and class structures, three types of liberalism are identified: radical liberalism in Guatemala and El Salvador, reformist liberalism in Costa Rica and aborted liberalism in Honduras and Nicaragua. It is argued that these types of liberalism set the Central American countries on contrasting paths of political development, culminating in diverse regime outcomes.

Contadora: The Failure of Diplomacy

1986 ◽  
Vol 28 (3) ◽  
pp. 1-32 ◽  
Author(s):  
Bruce Michael Bagley
Keyword(s):  
United States ◽  
Costa Rica ◽  
El Salvador ◽  
Central America ◽  
Political System ◽  
Armed Forces ◽  
The United States ◽  
Central American ◽  
Democratic Political System

By Mid-1986, The Contadora Group's search for a negotiated peace in Central America had reached a seemingly insurmountable impasse. Negotiations were deadlocked over the issues of arms limitations, democratization, and US support for the Nicaraguan counter-revolutionaries (contrarevolucionarios or contras). The United States and its closest Central American allies - Costa Rica, Honduras and El Salvador - demanded that Nicaragua reduce the size of its armed forces and install a democratic political system before they would end support for the contras Nicaragua's Sandinistas, in turn, refused to disarm until the United States and its Central American neighbors halted their support for the contras, they also rejected all proposals for direct negotiations with the contras.

The Politics of Presidential Term Limits in Central America

2019 ◽  
pp. 495-516
Author(s):  
Juan Muñoz-Portillo ◽  
Ilka Treminio
Keyword(s):  
Latin America ◽  
Costa Rica ◽  
El Salvador ◽  
Case Studies ◽  
Central America ◽  
Political Institutions ◽  
Political Development ◽  
Term Limits ◽  
Central American ◽  
The Political

This chapter studies presidential term limits—understood as limits on presidential re-elections and term lengths—in four Central American electoral democracies: Costa Rica, El Salvador, Guatemala, and Honduras. Its contribution is threefold. First, it explains the evolution of these institutions as part of the political development process of these polities after independence from Spain. Second, the chapter conducts two emblematic case studies of the politics of recent term limits reforms in Latin America via constitutional reviews: Costa Rica (1999–2003) and Honduras (2009 and 2015). Finally, it examines the consequences of term limits for democracy and policymaking. In this regard, it argues that term lengths affect policymaking in Costa Rica and Honduras, and that the political institutions in these countries combined with the popularity of ex-presidents make presidential re-elections possible. In contrast, in El Salvador and Guatemala the influence of term limits is offset by formal and informal constraints.

State-Making and Nation-Building in Central America

2020 ◽  
Author(s):  
David Díaz Arias
Keyword(s):  
Costa Rica ◽  
El Salvador ◽  
Central America ◽  
Social Exclusion ◽  
Civil Wars ◽  
Indigenous Communities ◽  
State Violence ◽  
Central American ◽  
Liberal State ◽  
Nation States

Central America experienced the construction of multiple forms of new identities from independence in 1821 to the present. Between 1825 and 1840, Central American politicians formed a Federal Republic to keep the region integrated as a single country but failed by getting involved in civil wars. Only Costa Rica remained relatively peaceful during the first decades after independence. During much of the nineteenth century, the other four countries confronted the problem of how to achieve political centralization. But local caudillos, the confrontations between elites, internal civil wars, economic weakness, and imperial interventions limited their plans. After 1870, the Central American nation-states started developing three patterns of racial identities: first, a liberal state in Costa Rica which was able to secure the image of a homogenous, white society with juridical institutions and electoral democracy; second, mestizo nations with limited citizenship in Nicaragua, El Salvador, and Honduras where politicians and intellectuals managed to rule with the military; and third, a nation-state in Guatemala where indigenous people remained outside the national identity during most of the nineteenth and twentieth centuries. After 1954, social exclusion promoted revolutions commanded by guerrilla groups with the support of indigenous communities. During the 1980s, most of Central America was in civil war as a consequence of illegitimate states, a weak popular identification with national identities, and the legacy of decades of social exclusion, state violence, and inequality. By the end of the 1980s and early 1990s, local elites, political authorities, and guerrilla warriors in Guatemala, El Salvador, and Nicaragua negotiated peace. During the 1990s, access to power was decided through elections throughout Central America, and state institutions, such as supreme courts, legislative assemblies, ministers, and press, had the opportunity to bloom. Yet, democracy is still weak in this region.

Organization of Central American States

1952 ◽  
Vol 6 (1) ◽  
pp. 151-152
Keyword(s):  
Costa Rica ◽  
El Salvador ◽  
Central America ◽  
Group Action ◽  
Central American ◽  
San Salvador ◽  
American States ◽  
Common Problems ◽  
Foreign Ministers

The Foreign Ministers of the Central American States of Costa Rica, El Salvador, Guatemala, Honduras and Nicaragua, meeting in San Salvador October 8–14, 1951, to discuss measures for promoting the unity of Central America, drafted the “Charter of Salvador” to “promote by group action the strengthening of the bonds of fraternity among the five Central American states and to serve as an instrument for the study and solution of their common problems.”

The United States and the Rise of General Maximiliano Hernández Martínez

1971 ◽  
Vol 3 (2) ◽  
pp. 151-172 ◽  
Author(s):  
Kenneth J. Grieb
Keyword(s):  
United States ◽  
El Salvador ◽  
Central America ◽  
American Politics ◽  
State Department ◽  
The United States ◽  
The State ◽  
Central American ◽  
Coup D'etat ◽  
The Military

The militarycoup d'étatwhich installed General Maximiliano Hernández Martínez as President of El Salvador during December 1931 created a crisis involving the 1923 Washington Treaties. By the terms of these accords, the Central American nadons had pledged to withhold recognition from governments seizing power through force in any of the isthmian republics. Although not a signatory of the treaty, the United States based its recognition policy on this principle. Through this means the State Department had attempted to impose some stability in Central America, by discouraging revolts. With the co-operation of the isthmian governments, United States diplomats endeavored to bring pressure to bear on the leaders of any uprising, to deny them the fruits of their victory, and thus reduce the constant series ofcoupsandcounter-coupsthat normally characterized Central American politics.

Education and Research in Astronomy in Central America

1998 ◽  
Vol 11 (2) ◽  
pp. 885-887
Author(s):  
M. C. Pineda De Carias
Keyword(s):  
El Salvador ◽  
Central America ◽  
International Cooperation ◽  
Central American ◽  
University Staff ◽  
National University ◽  
San Carlos ◽  
Observational Techniques ◽  
Astronomy And Astrophysics

Recently, important efforts have been made to organize and consolidate the Assembly of Central American Astronomers (AAAC), an organization created to contribute to the development of astronomy and astrophysics in Central America, with the help of international cooperation; the Central American Courses in Astronomy and Astrophysics, have been hosted each year by a different national university in Central America (1995: Universidad Nacional Autonoma de Honduras, 1996: Universidad de El Salvador, 1997: Universidad de San Carlos de Guatemala, and 1998: Universidad de Panama). These courses aimed to provide an exchange of knowledge and experience among university staff and students interested in continuing studies in Astronomy and Astrophysics. Regional Observational Campaigns have been organized to train young astronomers in the use of astronomical equipment and observational techniques. It seems that the broad development of astronomy and astrophysics in Central American as a whole, will be possible only when nuclei of astronomers in each of the countries concerned begin to develop many more activities, countries As part of the III Central American Course on Astronomy and Astrophysics (III-CURCAA, April 1997, Guatemala), in a forum about Education and Research in Astronomy in Central America, several important conclusions were stated. In this paper we present the six most relevant conclusions discussed there.

scholarly journals Detección de la presencia del ácaro (Aculops lycopersici) causante del bronceamiento del tomate (Lycoprsicon esculentum) en El Salvador, América Central

2016 ◽  
Vol 2 ◽  
pp. 49
Author(s):  
Leopoldo Serrano Cervantes
Keyword(s):  
Costa Rica ◽  
El Salvador ◽  
Central America ◽  
Taxonomic Identification ◽  
Review Of Literature ◽  
Plant Mortality ◽  
Tomato Plants ◽  
Aculops Lycopersici ◽  
The Tropics ◽  
First Time

In October 1989, microscopic specimens of (acaros) with symptoms of browning and plant mortality in young and older tomato plants from various locations in El Salvador were sent tó the entomologist Ing. Ronald Ochoa from Costa Rica. lng. Ronald Ochoa is associated with the Diagnostics Network of the Centro Agronomico Tropical de Investigation y Enseñanza (CATlE) based in Turrialba, Costa Rica. Microscopic examination of this material confirmed the taxonomic identification as Aculops lycopersici (Acariformes: Eriophyidae), suspected since May 1988 with the first observation and collection of samples. Abrief review of literature and a phone conversation with the specialist who identified the material, permits reporting for the first time of the presence of this species in El Salvador. This finding is a warning about this pest which could be apotential problem in the tropics of Central America. This paper discusses personal observations of some of the characteristics, habits and appearances of this species, small experiments, and it includes a review of literature pertinent to this subject

Sign in / Sign up

Export Citation Format

Share Document