articles+ search results
4 articles+ results
1 - 4
Number of results to display per page
-
Dias FB, Paula AS, Belisário CJ, Lorenzo MG, Bezerra CM, Harry M, and Diotaiuti L
Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases [Infect Genet Evol] 2011 Jul; Vol. 11 (5), pp. 869-77. Date of Electronic Publication: 2011 Feb 16.
- Subjects
-
Animals, Brazil, Circadian Rhythm, Climate, Demography, Ecosystem, Genetic Variation, Species Specificity, Temperature, Arecaceae genetics, Arecaceae parasitology, and Rhodnius genetics
- Abstract
-
This work evaluated the occurrence and genetic structure of Rhodnius nasutus sampled in two sites using morphometry and microsatellites. These sites, presented distinct abiotic features and palm trees: (i) nine Attalea speciosa palm trees, so called babaçu, were sampled from the Meruoca Mountain Ridge, a sloping region of reminiscent forest in the state of Ceará, Brazil, and (ii) 17 Copernicia prunifera palm trees, so called carnaúba, were sampled in the scrub savanna region (Sobral district) that surrounds the mountain ridge. Of the twenty-six palm trees dissected, 70.6% of carnauba and 88.9% of babaçu were infested by R. nasutus. The micro-climatic data where R. nasutus were sheltered demonstrated that the babaçu and carnaúba palm trees presented significant differences (p < 0.05) in relation to the external environment, except for temperature and relative humidity regulation, suggesting that the architecture of the babaçu crown keeps a more stable micro-environment. The morphometric studies of the F1 generation demonstrated that insects from the babaçu (A. speciosa) were significantly larger (p = 0.000) than those collected in carnaúba (C. prunifera) palm trees. Also, microsatellite analysis demonstrated a high genetic differentiation between the two groups of R. nasutus (R(st) = -0.77). Our results suggest that the difference in size between the populations is probably related to an incipient process of genetic drift in populations associated to each palm tree, probably also driven by the different climatic features observed in these micro-environments.
(Copyright © 2011 Elsevier B.V. All rights reserved.)
- Full text View on content provider's site
-
Klein, Joana Tartari, Redaelli, Luiza Rodrigues, and Barcellos, Aline
- Florida Entomologist. Dec, 2012, Vol. 95 Issue 4, 813.
- Subjects
-
Grasses -- Environmental aspects, Stink bugs -- Environmental aspects, Stink bugs -- Behavior, and Diapause
- Abstract
-
The rice stalk stink bug, Tibraca limbativentris Stal (Hemiptera: Pentatomidae), is a major pest of rice crops throughout Latin America. We investigated the occurrence of diapause in T. limbativentris, as well as the role of West Indian foxtail, Andropogon bicornis L.(Poaceae), in its seasonal abundance and mortality. This plant grows spontaneously in grasslands from Mexico to Argentina, including at the edges of rice fields in southern Brazil. Tussocks of A. bicornis were collected in Eldorado do Sul, State of Rio Grande do Sul, Brazil throughout one yr and examined to sample rice stalk stink bugs. We collected in 2,355 T. limbativentris adults from 208 tussocks, totalling 2,205 live and 150 dead individuals. Live insects were dissected to determine the reproductive stage and to assess the presence of the fat body. We describe the occurrence of imaginal diapause and the use of A. bicornis as a shelter for this rice pest. Overwintering lasted 7 mo; arrival at the refuge occurred in early autumn (late Mar); the permanence period began in Jun, and extended to the end of Sep. From Oct the population decreased gradually until total departure from the tussocks in Jan. Thus, here we highlight the role of A. bicornis as an hibernation site for T. limbativentris in southern Brazil. Key Words: Diapause, rice stalk stink bug, subtropics, tussocks O percevejo-do-colmo do arroz, Tibraca limbativentris Stal (Hemiptera: Pentatomidae), e considerada uma das principais pragas do arroz irrigado na America Latina. A ocorrencia de diapausa em T. limbativentris foi investigada, bem como o papel do capim-rabo-de-burro, Andropogon bicornis L.(Poaceae), na abundancia sazonal e mortalidade. Esta planta cresce espontaneamente em pastagens do Mexico a Argentina, incluindo o entorno do cultivo de arroz no sul do Brasil. Touceiras de A. bicornis foram coletadas em Eldorado do Sul, Estado do Rio Grande do Sul, Brasil, durante um ano e examinadas para a amostragem os percevejos. Foram coletados 2.355 adultos de T. limbativentris provenientes de 208 touceiras, totalizando 2.205 individuos vivos e 150 mortos. Insetos vivos foram dissecados afim de determinar o estagio de desenvolvimento dos orgaos reprodutivos e avaliar a presenca de corpos gordurosos. A ocorrencia de diapausa imaginal e a utilizacao de A. bicornis como abrigo foram descritas. A hibernacao durou 7 meses: a entrada no refugio ocorreu no inicio do outono; o periodo de permanencia iniciou em Junho, e estendeu-se ate o final de Setembro. A partir de Outubro, a populacao decresceu gradualmente ate o abandono total das touceiras em Janeiro. Desta forma, destacamos o papel de A. bicornis como um sitio de hibernacao para T. limbativentris, no sul do Brasil. Palavras-Chave: Diapausa, percevejo-do-grao-do-arroz, subtropico, touceiras
- Full text View on content provider's site
-
Popov, Nikolay, Wolhuter, Charl, Kalin, Jana, Hilton, Gillian, Ogunleye, James, Niemczyk, Ewelina, and Bulgarian Comparative Education Society (BCES)
Bulgarian Comparative Education Society . 336 pp.
- Subjects
-
Conference Papers, Conferences (Gatherings), Comparative Education, Educational History, International Education, Productivity, Partnerships in Education, International Educational Exchange, Rural Schools, Curriculum Development, Citizenship, Energy Education, Educational Opportunities, Educational Practices, Adult Education, Unemployment, Epistemology, Preservice Teacher Education, Inservice Teacher Education, Teaching Styles, Teacher Characteristics, Cognitive Style, Teacher Role, Educational Policy, Educational Administration, Lifelong Learning, Social Integration, Educational Legislation, Inclusion, Child Safety, Civil Rights, Interdisciplinary Approach, Research Skills, Research Methodology, Active Learning, Student Projects, Intervention, Action Research, Learning Experience, Student Attitudes, Technology Uses in Education, Educational Objectives, Private Financial Support, Majors (Students), Teaching Methods, Educational Resources, Foreign Countries, Brazil, Bulgaria, Canada, Croatia, Denmark, European Union, Finland, Iceland, Japan, Latvia, Mexico, Nigeria, Norway, Poland, Russia, Serbia, South Africa, Sweden, Texas, Turkey, and United Kingdom (England)
- Abstract
-
Papers from the proceedings of the 14th Annual Conference of the Bulgarian Comparative Education Society was submitted in two volumes. Volume 1 contains papers submitted at the conference held in Sofia, Bulgaria, June 14-17, 2016. Volume 2 contains papers submitted at the 4th International Partner Conference of the International Research Centre (IRC) "Scientific Cooperation," Rostov-on-Don, Russia. The overall conference theme was "Education Provision to Every One: Comparing Perspectives from Around the World" and included six thematic sections: (1) Comparative Education & History of Education; (2) Pre-service and In-service Teacher Training & Learning and Teaching Styles; (3) Education Policy, Reforms and School Leadership; (4) Higher Education, Lifelong Learning and Social Inclusion; (5) Law and Education: Legislation and Inclusive Education, Child Protection & Human Rights Education; and (6) Research Education: Developing Globally Competent Researchers for International and Interdisciplinary Research. The book contains a Preface: "Bulgarian Comparative Education Society: 25 Years of Being International" (Nikolay Popov); an Introduction: "Education Provision to Everyone: Comparing Perspectives from Around the World" (Lynette Jacobs) and papers divided into the respective thematic sections. Part 1: "Comparative Education & History of Education": (1) Jullien: Founding Father of Comparative and International Education Still Pointing the Way (Charl Wolhuter); (2) Presentation of Marc-Antoine Jullien's Work in Bulgarian Comparative Education Textbooks (Teodora Genova & Nikolay Popov); (3) "Teach Your Children Well": Arguing in Favor of Pedagogically Justifiable Hospitality Education (Ferdinand J. Potgieter); (4) Theory for Explaining and Comparing the Dynamics of Education in Transitional Processes (Johannes L. van der Walt); (5) Nordic Internationalists' Contribution to the Field of Comparative and International Education (Teodora Genova); (6) International Research Partners: The Challenges of Developing an Equitable Partnership between Universities in the Global North and South (Karen L. Biraimah); (7) Providing Books to Rural Schools through Mobile Libraries (Lynette Jacobs, Ernst Stals & Lieve Leroy); (8) South African Curriculum Reform: Education for Active Citizenship (Juliana Smith & Agnetha Arendse); (9) Universities Response to Oil and Gas Industry Demands in South Texas (USA) and Tamaulipas (Mexico) (Marco Aurelio Navarro); (10) Goals That Melt Away. Higher Education Provision in Mexico (Marco Aurelio Navarro & Ruth Roux); (11) How the Issue of Unemployment and the Unemployed Is Treated in Adult Education Literature within Polish and U.S. Contexts (Marzanna Pogorzelska & Susan Yelich Biniecki); (12) Contribuciones de un Modelo Multiniveles para el Análisis Comparado de Impactos de Políticas Educativas en la Educación Superior (Mirian Inés Capelari) [title and paper are provided in Spanish, abstract in English]; and (13) Internationalization, Globalization and Relationship Networks as an Epistemological Framework Based on Comparative Studies in Education (Amelia Molina García & José Luis Horacio Andrade Lara). Part 2: "Pre-service and In-service Teacher Training & Learning and Teaching Styles": (14) The Goals and Conditions of Qualitative Collaboration between Elementary Schools and Community -- A Challenge for the Professional Development (Jana Kalin & Barbara Šteh); (15) South African Heads of Department on Their Role in Teacher Development: Unexpected Patterns in an Unequal System (André du Plessis); (16) Do Teachers, Students and Parents Agree about the Top Five Good Teacher's Characteristics? (Marlena Plavšic & Marina Dikovic); and (17) Personality Traits and Learning Styles of Secondary School Students in Serbia (Gordana Djigic, Snežana Stojiljkovic & Andrijana Markovic). Part 3: "Education Policy, Reforms & School Leadership": (18) Routes into Teaching: Does Variety Aid Recruitment or Merely Cause Confusion? A Study of Three Different Programmes for Teacher Training in England (Gillian Hilton); (19) The Status of Teaching as a Profession in South Africa (Corene de Wet); (20) Initial and Continuing Professional Development of Adult Educators from an Educational - Policy Perspective: Rethinking from Croatia (Renata Cepic & Marijeta Mašic); (21) Educational Reform from the Perspective of the Student (Claudio-Rafael Vasquez-Martinez, Felipe Gonzalez-Gonzalez, Jose-Gerardo Cardona-Toro, MaríaGuadalupe Díaz-Renteria, Maria-Ines Alvarez, Hector Rendon, Isabel Valero, Maria Morfin, Miguel Alvarez); (22) Leadership and Context Connectivity: Merging Two Forces for Sustainable School Improvement (Nylon Ramodikoe Marishane); (23) Approaches to In-servicing Training of Teachers in Primary Schools in South Africa (Vimbi P. Mahlangu); (24) Social Justice and Capacity for Self-development in Educational Systems in European Union (Bo-Ruey Huang); (25) Social Justice and Capacity for Self-Development in Educational System in Japan (Yu-Fei Liu); and (26) Emotions in Education Generated by Migration (Graciela Amira Medecigo Shej). Part 4: "Higher Education, Lifelong Learning & Social Inclusion": (27) Ambivalent Community: International African Students in Residence at a South African University (Everard Weber An); (28) Internationalization of Higher Education Institutions in Latvia and Turkey: Its Management and Development during the Last Decade (Sibel Burçer & Ilze Kangro); (29) Lifelong Learning: Capabilities and Aspirations (Petya Ilieva-Trichkova); (30) Where Have All the Teachers Gone: A Case Study in Transitioning (Amanda S. Potgieter); (31) An Overview of Engineering Courses in Brazil: Actual Challenges (Alberto G. Canen, Iara Tammela & Diogo Cevolani Camatta); (32) Multiculturalism and Peace Studies for Education Provision in Time of Diverse Democracies (Rejane P. Costa & Ana Ivenicki); (33) Social Inclusion of Foreigners in Poland (Ewa Sowa-Behtane); (34) An Autistic Child Would Like to Say "Hello" (Maria Dishkova); (35) Research Approaches for Higher Education Students: A Personal Experience (Momodou M Willan); (36) Social Networks Use, Loneliness and Academic Performance among University Students (Gordana Stankovska, Slagana Angelkovska & Svetlana Pandiloska Grncarovska); and (37) The Personal Characteristics Predictors of Academic Success (Slagana Angelkoska, Gordana Stankovska & Dimitar Dimitrovski). Part 5: "Law and Education: Legislation and Inclusive Education, Child Protection & Human Rights Education": (38) An Exploration of the Wider Costs of the Decision by the Rivers State Government in Nigeria to Revoke International Students' Scholarships (Elizabeth Achinewhu-Nworgu & Queen Chioma Nworgu); (39) Strategies for Improving the Employability Skills and Life Chances of Youths in Nigeria (Elizabeth Achinewhu-Nworgu, Steve Azaiki, Shade Babalola & Chinuru Achinewhu); (40) Examining the Role, Values, and Legal Policy Issues Facing Public Library Resources in Supporting Students to Achieve Academic Success (Elizabeth Achinewhu-Nworgu, Steve Azaiki & Queen Chioma Nworgu); (41) Peer Exclusion at Physical Education (Gorazde Sotosek); (42) Exclusion and Education in South Africa: An Education Law Perspective of Emerging Alternative Understandings of Exclusion (Johan Beckmann); and (43) Educational and Social Inclusion of Handicapped Children. Polish Experiences (Anna Czyz). Part 6: "Research Education: Developing Globally Competent Researchers for International and Interdisciplinary Research": (44) Observations about Research Methodology during 15 Years of Presenting Capacity-Building Seminars (Johannes L. van der Walt); and (45) Using a Play-Based Methodology in Qualitative Research: A Case of Using Social Board to Examine School Climate (Anna Mankowska). Following the presentation of the complete conference papers, the following abstracts are provided: (1) Project-Based Learning in Polish-American Comparative Perspective (Marzanna Pogorzelska); (2) Teaching and Researching Intervention and Facilitation in a Process of Self-reflection: Scrutinity of an Action Research Process (Juliana Smith); (3) Investigating Perceptions of Male Students in Early Childhood Education Program on Learning Experiences (Ayse Duran); (4) Teacher Professional Development and Student Achievement in Turkey: Evidence from TIMSS 2011 (Emine Gumus & Mehmet Sukru Bellibas); (5) The Usage of CBT and Ayeka Approach at the Kedma School (Yehuda Bar Shalom & Amira Bar Shalom); (6) Factors Affecting Turkish Teachers' Use of ICT for Teaching: Evidence from ICILS 2013 (Mehmet Sukru Bellibas & Sedat Gumus); (7) Application of Big Data Predictive Analytics in Higher Education (James Ogunleye); (8) The Pursuit of Excellence in Malaysian Higher Education: Consequences for the Academic Workplace (David Chapman, Sigrid Hutcheson, Chang Da Wan, Molly Lee, Ann Austin, Ahmad Nurulazam); (9) Challenging the Value and Missions of Higher Education: New Forms of Philanthropy and Giving (Pepka Boyadjieva & Petya Ilieva-Trichkova); (10) The Effects of Major-changing between Undergraduates and Postgraduates on the Major Development of Postgraduates (Jinmin Yu & Hong Zhu); (11) Spotlight on Canadian Research Education: Access of Doctoral Students to Research Assistantships (Ewelina Kinga Niemczyk); (12) Regulation or Freedom? Considering the Role of the Law in Study Supervision (J. P. Rossouw & M. C. Rossouw); (13) The Subjectivity-Objectivity Battle in Research (Gertrude Shotte); and (14) Interdisciplinary Approach to Teaching Chemistry: Electrochemical Biosensors Case Study (Margarita Stoytcheva & Roumen Zlatev). A Name Index is included. (Individual papers contain references.) [For Volume 2, "Education Provision to Every One: Comparing Perspectives from around the World. BCES Conference Books, Volume 14, Number 2" see ED568089.]
- Full text Full Text from ERIC
-
Marques RN, Teixeira DC, Yamamoto PT, and Lopes JR
Journal of economic entomology [J Econ Entomol] 2012 Apr; Vol. 105 (2), pp. 329-37.
- Subjects
-
Animals, Brazil, DNA, Bacterial analysis, Hemiptera classification, Insect Vectors classification, Phytoplasma classification, Phytoplasma genetics, Phytoplasma isolation purification, Polymerase Chain Reaction, Population Density, Sequence Analysis, DNA, Species Specificity, Citrus microbiology, Hemiptera microbiology, Insect Vectors microbiology, Phytoplasma physiology, Plant Diseases microbiology, and Plant Weeds growth development
- Abstract
-
Huanglongbing (HLB) is a severe citrus (Citrus spp.) disease associated with the bacteria genus Candidatus Liberibacter, detected in Brazil in 2004. Another bacterium was found in association with HLB symptoms and characterized as a phytoplasma belonging to the 16SrIX group. The objectives of this study were to identify potential leafhopper vectors of the HLB-associated phytoplasma and their host plants. Leafhoppers were sampled every other week for 12 mo with sticky yellow cards placed at two heights (0.3 and 1.5 m) in the citrus tree canopy and by using a sweep net in the ground vegetation of two sweet orange, Citrus sinensis (L.) Osbeck, groves infected by the HLB-phytoplasma in São Paulo state. Faunistic analyses indicated one Agalliinae (Agallia albidula Uhler) and three Deltocephalinae [Balclutha hebe (Kirkaldy), Planicephalus flavicosta (Stål), and Scaphytopius (Convelinus) marginelineatus (Stål)] species, as the most abundant and frequent leafhoppers (Hemiptera: Cicadellidae). Visual observations indicated an association of leafhopper species with some weeds and the influence of weed species composition on leafhopper abundance in low-lying vegetation. S. marginelineatus and P. flavicosta were more frequent on Sida rhombifolia L. and Althernantera tenella Colla, respectively, whereas A. albidula was observed more often on Conyza bonariensis (L.) Cronq. and B. hebe only occurred on grasses. DNA samples of field-collected S. marginelineatus were positive by polymerase chain reaction and sequencing tests for the presence of the HLB-phytoplasma group, indicating it as a potential vector. The association of leafhoppers with their hosts may be used in deciding which management strategies to adopt against weeds and diseases in citrus orchards.
- Full text View on content provider's site
Catalog
Books, media, physical & digital resources
Guides
Course- and topic-based guides to collections, tools, and services.