900 resultados para Knowledge-to-action
Resumo:
Family court judges are often asked to make inferences about - or directly interview children to ascertain - children's custody preferences and their maturity to express such preferences. These estimates of children's developmental maturity are important to the judges' considerations of children's "best interests" in custody cases. The research literature describing family court judges' background, education, training, and knowledge about child development is scant. With appropriate child development knowledge, judges should be better able to identify the developmental stages at which children have the cognitive and social capabilities to communicate directly their placement wishes or concerns. The current study is the first to examine judges' estimates of - and actual tests of - their child development knowledge, their training/education, and their application of this knowledge to their decisions to involve children as participants in contested custody cases.
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The objective of this cross sectional pilot study was to understand the cultural and social influences associated with the participation and retention of Mexican American parents in research studies. Mexican American parent's participation is limited due to cultural barriers that researchers may not recognize. Successful recruitment and retention of participants is a critical element for prevention research, particularly for groups that are underrepresented and carry a high burden of disease (Dunika, Garza, Roosa, & Stoerzinger, 1997). ^ The goal of this pilot study was to increase the understanding of research participation, recruitment and retention strategies among Mexican American adults using an instrument based on the Health Belief Model. This instrument was used to assess the cultural beliefs of Mexican American adults toward research participation. The dependent variable (research scenarios indexed by invasiveness) for each participant was compared to the independent variable (HBM scores) using chi-square analysis to see how the Health Belief Model constructs of perceived threat, perceived barriers, cues to action and perceived benefits are associated with how willing the participants are to participate in different risk levels of research. Descriptive statistics were used to assess the items on the instrument regarding acculturation, demographics, and sample size. ^ This study expands on current knowledge of research participation and retention strategies and methods involving the Mexican American parents. Using data from this study, researchers can observe relevant patterns from the participant's responses.^
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Genetics education for physicians has been a popular publication topic in the United States and in Europe for over 20 years. Decreasing numbers of medical genetics professionals and an increasing volume of genetic information has created a dire need for increased genetics training in medical school and in clinical practice. This study aimed to assess how well pediatrics-focused primary care physicians apply their general genetics knowledge to clinical genetic testing using scenario-based questions. We chose to specifically focus on knowledge of the diagnostic applicability of Chromosomal Microarray (CMA) technology in pediatrics because of its recent recommendation by the International Standard Cytogenomic Array (ISCA) Consortium as a first-tier genetic test for individuals with developmental disabilities and/or congenital anomalies. Proficiency in ordering baseline genetic testing was evaluated for eighty-one respondents from four pediatrics-focused residencies (categorical pediatrics, pediatric neurology, internal medicine/pediatrics, and family practice) at two large residency programs in Houston, Texas. Similar to other studies, we found an overall deficit of genetic testing knowledge, especially among family practice residents. Interestingly, residents who elected to complete a genetics rotation in medical school scored significantly better than expected, as well as better than residents who did not elect to complete a genetics rotation. We suspect that the insufficient knowledge among physicians regarding a baseline genetics work-up is leading to redundant (i.e. concurrent karyotype and CMA) and incorrect (i.e. ordering CMA to detect achondroplasia) genetic testing and is contributing to rising health care costs in the United States. Our results provide specific teaching points upon which medical schools can focus education about clinical genetic testing and suggest that increased collaboration between primary care physicians and genetics professionals could benefit patient health care overall.
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The Institute of Medicine (IOM) report on the future of health care states that the focus on health needs to shift to the management and prevention of chronic illnesses and that academic health centers (AHCs) should play an active role in this process through community partnerships (IOM, 2002). Grant funding from the National Institutes of Health and the creation of the Centers for Disease Control and Prevention (CDC) Prevention Research Centers (PRC) across the county represent a transition toward more proactively seeking out community partnerships to better design and disseminate health promotion programs (Green, 2001). ^ The focus of the PRCs is to conduct rigorous, community-based, prevention research, to seek outcomes applicable to public health programs and policies. The PRCs work is to create and foster partnerships among public health and community organizations, to address health promotion and disease prevention issues (CDC, 2003). ^ The W.K. Kellogg Foundation defines CBPR as "a collaborative approach to research that equitably involves all partners in the research process and recognizes the unique strengths that each brings. CBPR begins with a research topic of importance to the community with the aim of combining knowledge and action for social change to improve community health." ^ In 1995, CDC asked the IOM to review the PRC program to examine the extent to which the program is providing the public health community with strategies to address public health problems in disease prevention and health promotion (IOM, 1997). No comprehensive evaluation n of the individual PRCs had ever been done (IOM, 1997). ^ The CDC was interested in understanding how it could better support the PRC program through improved management and oversight to influence the program's success. The CDC only represents one of the entities that influence the success of a PRC. Another key entity to consider is the support of and influence of the Schools of Public Health in which the PRCs reside. Using evaluation criteria similar to those that were developed by the IOM, this study examined how aspects of structural capacity of the Schools of Public Health in which the PRCs reside are perceived to influence PRC community-based research activities. ^
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La formación en didáctica y práctica de la Geografía de los profesores en la Universidad Nacional del Sur es concebida como un proceso complejo e inacabado de construcción personal del conocimiento, en el que el ejercicio del análisis reflexivo representa la acción vertebradora. La asignatura Didáctica y Práctica de la Geografía se presenta como un saber en construcción que permite conectar la Geografía como ciencia académica con la Geografía como disciplina en la educación secundaria obligatoria, a través del enlace de los diferentes componentes que se conjugan en el proceso de enseñanza-aprendizaje con el sustento epistemológico, nexo fundamental del proceso. Una de las finalidades formativa de la disciplina es promover mediante acciones concretas un proceso que favorezca un posicionamiento del futuro docente como "autor y protagonista" en la enseñanza de la Geografía, y no como mero aplicador o receptor de diseños y líneas de acciones pensadas por otros actores, muchos de los cuales son ajenos al ámbito del trabajo en el aula. En relación con esta aspiración, a través de diferentes propuestas didácticas se aborda, desde el tratamiento teórico y desde el ejercicio de la práctica, la importancia de diagramar contenidos geográficos para la educación secundaria. De este modo, se intenta construir y fortalecer en el alumno un pensamiento consciente y fundamentado a partir del cual sea posible tomar decisiones para organizar la tarea de enseñanza y aprendizaje
Resumo:
La formación en didáctica y práctica de la Geografía de los profesores en la Universidad Nacional del Sur es concebida como un proceso complejo e inacabado de construcción personal del conocimiento, en el que el ejercicio del análisis reflexivo representa la acción vertebradora. La asignatura Didáctica y Práctica de la Geografía se presenta como un saber en construcción que permite conectar la Geografía como ciencia académica con la Geografía como disciplina en la educación secundaria obligatoria, a través del enlace de los diferentes componentes que se conjugan en el proceso de enseñanza-aprendizaje con el sustento epistemológico, nexo fundamental del proceso. Una de las finalidades formativa de la disciplina es promover mediante acciones concretas un proceso que favorezca un posicionamiento del futuro docente como "autor y protagonista" en la enseñanza de la Geografía, y no como mero aplicador o receptor de diseños y líneas de acciones pensadas por otros actores, muchos de los cuales son ajenos al ámbito del trabajo en el aula. En relación con esta aspiración, a través de diferentes propuestas didácticas se aborda, desde el tratamiento teórico y desde el ejercicio de la práctica, la importancia de diagramar contenidos geográficos para la educación secundaria. De este modo, se intenta construir y fortalecer en el alumno un pensamiento consciente y fundamentado a partir del cual sea posible tomar decisiones para organizar la tarea de enseñanza y aprendizaje
Resumo:
La formación en didáctica y práctica de la Geografía de los profesores en la Universidad Nacional del Sur es concebida como un proceso complejo e inacabado de construcción personal del conocimiento, en el que el ejercicio del análisis reflexivo representa la acción vertebradora. La asignatura Didáctica y Práctica de la Geografía se presenta como un saber en construcción que permite conectar la Geografía como ciencia académica con la Geografía como disciplina en la educación secundaria obligatoria, a través del enlace de los diferentes componentes que se conjugan en el proceso de enseñanza-aprendizaje con el sustento epistemológico, nexo fundamental del proceso. Una de las finalidades formativa de la disciplina es promover mediante acciones concretas un proceso que favorezca un posicionamiento del futuro docente como "autor y protagonista" en la enseñanza de la Geografía, y no como mero aplicador o receptor de diseños y líneas de acciones pensadas por otros actores, muchos de los cuales son ajenos al ámbito del trabajo en el aula. En relación con esta aspiración, a través de diferentes propuestas didácticas se aborda, desde el tratamiento teórico y desde el ejercicio de la práctica, la importancia de diagramar contenidos geográficos para la educación secundaria. De este modo, se intenta construir y fortalecer en el alumno un pensamiento consciente y fundamentado a partir del cual sea posible tomar decisiones para organizar la tarea de enseñanza y aprendizaje
Resumo:
Long term global archives of high-moderate spatial resolution, multi-spectral satellite imagery are now readily accessible, but are not being fully utilised by management agencies due to the lack of appropriate methods to consistently produce accurate and timely management ready information. This work developed an object-based remote sensing approach to map land cover and seagrass distribution in an Australian coastal environment for a 38 year Landsat image time-series archive (1972-2010). Landsat Multi-Spectral Scanner (MSS), Thematic Mapper (TM) and Enhanced Thematic Mapper (ETM+) imagery were used without in situ field data input (but still using field knowledge) to produce land and seagrass cover maps every year data were available, resulting in over 60 map products over the 38 year archive. Land cover was mapped annually using vegetation, bare ground, urban and agricultural classes. Seagrass distribution was also mapped annually, and in some years monthly, via horizontal projected foliage cover classes, sand and deep water. Land cover products were validated using aerial photography and seagrass maps were validated with field survey data, producing several measures of accuracy. An average overall accuracy of 65% and 80% was reported for seagrass and land cover products respectively, which is consistent with other studies in the area. This study is the first to show moderate spatial resolution, long term annual changes in land cover and seagrass in an Australian environment, created without the use of in situ data; and only one of a few similar studies globally. The land cover products identify several long term trends; such as significant increases in South East Queensland's urban density and extent, vegetation clearing in rural and rural-residential areas, and inter-annual variation in dry vegetation types in western South East Queensland. The seagrass cover products show that there has been a minimal overall change in seagrass extent, but that seagrass cover level distribution is extremely dynamic; evidenced by large scale migrations of higher seagrass cover levels and several sudden and significant changes in cover level. These mapping products will allow management agencies to build a baseline assessment of their resources, understand past changes and help inform implementation and planning of management policy to address potential future changes.
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En la primera parte de este trabajo se define la gobernanza como un concepto político que responde adecuadamente a las necesidades sociales de la naturaleza humana. En consecuencia, la adecuada conceptualización de este término puede servir para resolver los problemas sociales y también para orientar hacia el éxito los esfuerzos de la cooperación al desarrollo. Este concepto político resulta particularmente apropiado para la situación actual de la sociedad peruana, donde la existencia de conflictos sociales manifiesta la necesidad de una planificación liderada desde el ámbito público que enfrente la diversidad cultural y social que caracteriza a esta sociedad. Después de un análisis de las políticas de la cooperación internacional en Perú y de las últimas intervenciones para el desarrollo de la gobernanza, es posible concluir que en el país no existe una política para la cooperación internacional; que no hay un enfoque territorial en las intervenciones y que la práctica planificadora no considera una unión entre conocimiento y acción, limitándose a un enfoque tradicional de la planificación en la cooperación para el desarrollo. Esta investigación aporta un modelo para orientar las intervenciones de la cooperación internacional para el desarrollo de la gobernanza que se caracteriza por un liderazgo del ámbito público, una innovación en la gestión de dicho ámbito y un modelo de planificación mixto, una unión del modelo de Análisis de Políticas y el modelo de Aprendizaje Social. Por último, el modelo propuesto puede tener una amplia aplicación en los programas de desarrollo en Perú. On the first part of this research I found that governance is a political concept which responds adequately to social needs of human being. Thus, an adequate conceptualization of governance could help to solve social problems and lead efforts of Development Cooperation to success. This political concept is particularly appropriate to current Peruvian society where exist social conflicts which show a clear necessity of planning which should be leaded by the public sector. This is necessary to face cultural and social diversity which characterize this society. After an analysis of the International Cooperation management in Peru and a review of the last projects for developing governance, I found there is not a Politic for International Cooperation; projects does not have a territorial focusing; and planning does not characterize as union between knowledge and action. In this sense, there is a traditional planning in Development Cooperation. This research contributes with a model to lead International Cooperation projects for developing governance. This model is characterized by a leadership of public sector; an innovation in the public sector management; and a mix planning model between Politics Analysis and Social Learning. Finally, as the model was validated by two International Cooperation projects focused in sectorial objective, this model could have a wide application in Development programs in Peru.
Resumo:
Inside COBRA 2011 RICS International Research Conference, the present paper is linked to analyze the liability of the construction professional in his practice as a expert witness in the Spanish legal framework. In a large number of legal procedures related to the building it is necessary the intervention of the expert witness to report on the subject of litigation, and to give an opinion about possible causes and solutions. This field is increasingly importantly for the practice of construction professional that requires an important specialization. The expert provides his knowledge to the judge in the matter he is dealing with (construction, planning, assessment, legal, ...), providing arguments or reasons as the base for his case and acting as part of the evidence. Although the importance of expert intervention in the judicial process, the responsibilities arising from their activity is a slightly studied field. Therefore, the study has as purpose to think about the regulation of professional activities raising different aims. The first is to define the action of the construction professional-expert witness and the need for expert evidence, establishing the legal implications of this professional activity. The different types of responsibilities (the civil, criminal and administrative) have been established as well as the economic, penal or disciplinary damages that can be derived from the expert report
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From its creation, Spanish Young Generation in Nuclear (Jóvenes Nucleares, JJNN), a non-profit organization that depends on the Spanish Nuclear Society (SNE), has as an important scope to help spread knowledge about nuclear energy, not only pointing out its advantages and its role in our society, but also trying to correct some of the ideas that are due to the biased information and to the lack of knowledge. To try to have success in that goal, some high school lectures were taught and it has been organized regularly a Basic Course on Nuclear Science and Technology
Resumo:
Acquired brain injury (ABI) is one of the leading causes of death and disability in the world and is associated with high health care costs as a result of the acute treatment and long term rehabilitation involved. Different algorithms and methods have been proposed to predict the effectiveness of rehabilitation programs. In general, research has focused on predicting the overall improvement of patients with ABI. The purpose of this study is the novel application of data mining (DM) techniques to predict the outcomes of cognitive rehabilitation in patients with ABI. We generate three predictive models that allow us to obtain new knowledge to evaluate and improve the effectiveness of the cognitive rehabilitation process. Decision tree (DT), multilayer perceptron (MLP) and general regression neural network (GRNN) have been used to construct the prediction models. 10-fold cross validation was carried out in order to test the algorithms, using the Institut Guttmann Neurorehabilitation Hospital (IG) patients database. Performance of the models was tested through specificity, sensitivity and accuracy analysis and confusion matrix analysis. The experimental results obtained by DT are clearly superior with a prediction average accuracy of 90.38%, while MLP and GRRN obtained a 78.7% and 75.96%, respectively. This study allows to increase the knowledge about the contributing factors of an ABI patient recovery and to estimate treatment efficacy in individual patients.
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The engineer must have sufficient theoretical knowledge to be applied to solve specific problems, with the necessary capacity to simplify these approaches, and taking into account factors such as speed, simplicity, quality and economy. In Geology, its ultimate goal is the exploration of the history of the geological events through observation, deduction, reasoning and, in exceptional cases by the direct underground exploration or experimentation. Experimentation is very limited in Geology. Reproduction laboratory of certain phenomena or geological processes is difficult because both time and space become a large scale. For this reason, some Earth Sciences are in a nearly descriptive stage whereas others closest to the experimental, Geophysics and Geochemistry, have assimilated progress experienced by the physics and chemistry. Thus, Anglo-Saxon countries clearly separate Engineering Geology from Geological Engineering, i.e. Applied Geology to the Geological Engineering concepts. Although there is a big professional overlap, the first one corresponds to scientific approach, while the last one corresponds to a technological one. Applied Geology to Engineering could be defined as the Science and Applied Geology to the design, construction and performance of engineering infrastructures in and field geology discipline. There has been much discussion on the primacy of theory over practice. Today prevails the exaggeration of practice, but you get good workers and routine and mediocre teachers. This idea forgets too that teaching problem is a problem of right balance. The approach of the action lines on the European Higher Education Area (EHEA) framework provides for such balance. Applied Geology subject represents the first real contact with the physical environment with the practice profession and works. Besides, the situation of the topic in the first trace of Study Plans for many students implies the link to other subjects and topics of the career (tunnels, dams, groundwater, roads, etc). This work analyses in depth the justification of such practical trips. It shows the criteria and methods of planning and the result which manifests itself in pupils. Once practical trips experience developed, the objective work tries to know about results and changes on student’s motivation in learning perspective. This is done regardless of the outcome of their knowledge achievements assessed properly and they are not subject to such work. For this objective, it has been designed a survey about their motivation before and after trip. Survey was made by the Unidad Docente de Geología Aplicada of the Departamento de Ingeniería y Morfología del Terreno (Escuela Técnica Superior de Ingenieros de Caminos, Canales y Puertos, Universidad Politécnica de Madrid). It was completely anonymous. Its objective was to collect the opinion of the student as a key agent of learning and teaching of the subject. All the work takes place under new teaching/learning criteria approach at the European framework in Higher Education. The results are exceptionally good with 90% of student’s participation and with very high scores in a number of questions as the itineraries, teachers and visited places (range of 4.5 to 4.2 in a 5 points scale). The majority of students are very satisfied (average of 4.5 in a 5 points scale).
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La nueva legislación en materia fitosanitaria se dirige hacia una Gestión Integrada de Plagas (GIP). Estos programas dan preferencia a aquellos métodos más respetuosos y sostenibles con el medio ambiente, siendo piezas claves en ellos el control biológico, el físico y otros de carácter no químico. Sin embargo, el uso de insecticidas selectivos es a veces necesario para el adecuado manejo de plagas en cultivos hortícolas. Por ello, el objetivo general de este estudio es aportar conocimientos para mejorar el control de plagas en cultivos hortícolas, mediante la integración de tres estrategias de lucha: biológica, física y química. Una parte de este trabajo ha consistido en el estudio de los posibles efectos que mallas tratadas con insecticida (bifentrin) pudieran provocar mediante diferentes ensayos de laboratorio, invernadero y campo, en los enemigos naturales Orius laevigatus (Fieber) (Hemiptera: Anthocoridae) (depredador de trips), Nesidiocoris tenuis (Reuter) (Hemiptera: Miridae) (depredador de mosca blanca y Tuta absoluta (Meirick) (Lepidoptera: Gelechiidae)), y otros agentes de biocontrol comúnmente usados en cultivos hortícolas protegidos. Este tipo de mallas se han empleado con éxito en entomología médica para controlar mosquitos vectores de la malaria, y actualmente se está trabajando en su desarrollo para uso agrícola como método de exclusión, y método directo de control de plagas. En los ensayos realizados en laboratorio, O. laevigatus y N. tenuis no fueron capaces de detectar la presencia de bifentrin en el ensayo de preferencia. Además, no se produjo mortalidad a corto plazo (72 horas) en ambos chinches depredadores. Por el contrario, se registró una elevada mortalidad cuando se expusieron por contacto a la malla tratada durante 72 horas en cajas de dimensiones reducidas (10 cm de diámetro X 3 cm de altura). En ensayos llevados a cabo bajo condiciones más reales de exposición, en un invernadero experimental con jaulas de 25 X 25 X 60 cm de altura, no se produjo ningún efecto en la mortalidad a corto plazo (72 horas) o en los parámetros reproductivos de O. laevigatus y N. tenuis. Finalmente, en ensayos de campo realizados en túneles semi-comerciales (8 m de largo X 6,5 m de ancho X 2,6 m de altura), ni las condiciones ambientales [temperatura, humedad relativa, radiación ultravioleta (UV) y fotosintéticamente activa (PAR)], ni los enemigos naturales, se vieron afectados por la presencia de la malla tratada con bifentrin en el cultivo. Sin embargo, los resultados no fueron concluyentes, debido al bajo establecimiento de los agentes de biocontrol liberados. Por lo tanto, más estudios son necesarios en invernaderos comerciales para confirmar los resultados preliminares de compatibilidad. Además, en este trabajo se han evaluado los efectos letales (mortalidad) y subletales (parámetros reproductivos) de seis modernos insecticidas sobre los chinches depredadores O. laevigatus y N. tenuis, mediante ensayos de laboratorio y persistencia. Los ensayos se realizaron por contacto residual, aplicando los insecticidas a la dosis máxima de campo sobre placas de cristal (laboratorio) o plantas (persistencia). Los productos fitosanitarios se seleccionaron por representar a un grupo de modernos plaguicidas con modos de acción en principio más selectivos para los enemigos naturales que antiguos plaguicidas como organoclorados, oroganofosforados o carbamatos, y por su uso frecuente en cultivos hortícolas donde O. laevigatus y N. tenuis están presentes. Todos ellos están incluidos o en proceso de inclusión en la lista comunitaria de sustancias activas para uso agrícola, Anexo I de la Directiva 91/414/CEE: abamectina y emamectina (avermectinas neurotóxicas, activadoras del canal del cloro), deltametrina (piretroide neurotóxico, modulador del canal del sodio, control positivo), flubendiamida (neurotóxico, modulador del receptor de rianodina), spinosad (naturalito neurotóxico, agonistas/antagonistas del receptor de nicotínico acetilcolina) y spiromesifen (inhibidor de la acetil CoA carboxilasa). El estudio mostró que O. laevigatus fue más susceptible a los insecticidas que N. tenuis. Además, los resultados revelaron que flubendiamida y spiromesifen fueron compatibles con los dos enemigos naturales estudiados, y por tanto se podrían usar en programas de GIP. Por el contrario, los insecticidas abamectina, deltametrina, emamectina y spinosad no fueron selectivos para ninguno de los chinches depredadores. Sin embargo, los estudios de persistencia demostraron que a pesar de que estos insecticidas no proporcionaron selectividad fisiológica, pueden proporcionar selectividad ecológica en algunos casos. Abamectina, deltametrina, emamectina y spinosad podrían ser compatibles con N. tenuis si el enemigo natural es introducido en el cultivo 4 días después de su aplicación. En el caso de O. laevigatus, abamectina, deltametrina y spinosad se clasificaron como persistentes, por lo tanto es necesario completar el estudio con experimentos de semi-campo y campo que determinen si es posible su uso conjunto en programas de GIP. Por otro lado, emamectina podría ser compatible con O. laevigatus si el enemigo natural es introducido en el cultivo 7 días después de su aplicación. Por último, se ha comprobado la selectividad de tres insecticidas aceleradores de la muda (MACs) (metoxifenocida, tebufenocida y RH-5849) sobre O. laevigatus y N. tenuis. Además de realizar estudios para evaluar la toxicidad en laboratorio de los insecticidas por contacto residual e ingestión (principal modo de acción de los MAC´s), se extrajo RNA de los insectos y con el cDNA obtenido se secuenció y clonó el dominio de unión al ligando (LBD) del receptor de ecdisona correspondiente a O. laevigatus (OlEcR-LBD) y N. tenuis (NtEcR-LBD). Posteriormente, se obtuvo la configuración en tres dimensiones del LBD y se estudió el acoplamiento de las moléculas de los tres insecticidas en la cavidad que forman las 12 α-hélices que constituyen el EcR-LBD. En el caso de N. tenuis se debe mencionar que no fue posible la obtención de la secuencia completa del LBD. Sin embargo, se obtuvo una secuencia parcial (hélice 6-hélice 11), que mostró una alta conservación de aminoácidos con respecto a la obtenida en O. laevigatus. Los ensayos de toxicidad mostraron que metoxifenocida, tebufenocida y RH-5849 no produjeron ningún efecto nocivo en ambos depredadores. Además, los estudios de modelado por homología y acoplamiento molecular llevados a cabo con O. laevigatus, también indicaron que los MACs no produjeron ningún efecto deletéreo en este enemigo natural. Por lo tanto, estos compuestos pueden ser aplicados de manera segura en programas de GIP en los cuales O. laevigatus y N. tenuis estén presentes. ABSTRACT The new pesticide legislation on pest control is aimed at integrated pest management (IPM). These programs are based on the most environmentally sustainable approaches, where biological, physical control and other non-chemical methods are the cornerstone. However, selective pesticides are often required for pest management on horticultural crops. Therefore, the main goal of this study is to provide knowledge to improve pest control on horticultural crops through the integration of three strategies: biological, physical and chemical. Firstly, the effects of insecticide treated nets (bifenthrin) were evaluated in different laboratory, greenhouse and field experiments on the natural enemies Orius laevigatus (Fieber) (Hemiptera: Anthocoridae) (predator of thrips), Nesidiocoris tenuis (Reuter) (Hemiptera: Miridae) (predator of whiteflies and Tuta absoluta (Meirick) (Lepidoptera: Gelechiidae)), and other biocontrol agents commonly used on protected horticultural crops. These types of nets have been successfully used in medical entomology to control mosquito malaria vectors, and work is currently being done on their use as exclusion barriers and as a direct method of pest control in agriculture. In experiments made under laboratory conditions, O. laevigatus and N. tenuis were not able to detect the presence of bifenthrin in a dual-choice test. Furthermore, no shortterm mortality (72 hours) was recorded on both predatory bugs. In contrast, a high mortality rate was found when they were exposed by contact to the bifenthrin-treated net for 72 hours in small cages (10 cm diameter X 3 cm high). In assays carried out under more realistic conditions of exposure, in an experimental greenhouse with cages of 25 X 25 X 60 cm high, short-term mortality (72 hours) and reproductive parameters were not affected. Lastly, in field experiments carried out in semi-commercial tunnels (8 m long X 6.5 m width X 2.6 m high), neither environmental conditions [temperature, relative humidity, ultraviolet (UV) and photosynthetically active radiation (PAR)] nor natural enemies were affected by the presence of the bifenthrin-treated net on the crop. However, results were not conclusive, mainly due to a low settlement of the released biocontrol agents, and further studies are needed in commercial greenhouses to confirm our preliminary results of compatibility. Secondly, the lethal (mortality) and sublethal effects (reproductive parameters) of six modern pesticides on the predatory bugs O. laevigatus and N. tenuis has been evaluated through laboratory and persistence experiments. Trials were carried out by residual contact, applying the insecticides to the maximum field recommended concentration on glass plates (laboratory) or plants (persistence). Insecticides were chosen as representatives of modern pesticides with a more selective mode of action on natural enemies than organochlorine, organophosphorus and carbamate insecticides. Moreover, they were also chosen because of their frequent use on horticultural crops where O. laevigatus and N. tenuis are present. All of them have been included or have been requested for inclusion in the community list of active substances on the agricultural market, Annex I of the European Directive 91/414/EEC: abamectin and emamectin (neurotoxic avermectins, chloride channel activators), deltamethrin (neutotoxic pyrethroid, sodium channel modulator, positive commercial standard), flubendiamide (neurotoxic, rianodine receptor modulator), spinosad (neurotoxic naturalyte, nicotinic acetylcholine receptor allosteric activator) and spiromesifen (inhibitors of acetyl CoA carboxylase). The study showed that O. laevigatus was more susceptible to all the studied pesticides than N. tenuis. In addition, the research results indicated no impact of flubendiamide and spiromesifen on the two natural enemies studied under laboratory conditions. Consequently, both pesticides are candidates to be included in IPM programmes where these biocontrol agents are present. On the other hand, abamectin, deltamethrin, emamectin and spinosad were not selective for both predatory bugs in laboratory experiments. However, persistence test demonstrated that in spite of the lack of physiological selectivity, these pesticides can provide ecological selectivity in some cases. Abamectin, deltamethrin, emamectin and spinosad could be compatible with N. tenuis if the mirid bug is released 4 days after the insecticide treatment on the crop. With regard to O. laevigatus, abamectin, deltamethrin and spinosad were classified as persistent in our assays, thus the study should be completed with semi-field and field experiments in order to ascertain their possible joint use in IPM programs. In contrast, emamectin could be compatible with O. laevigatus if the pirate bug is released 7 days after the insecticide treatment on the crop. Finally, the selectivity of three moulting accelerating compounds (MACs) (methoxyfenozide, tebufenozide and RH-5849) has also been evaluated on O. laevigatus and N. tenuis. In addition to laboratory experiments to evaluate the toxicity of the insecticides by residual contact and ingestion, molecular approaches were used as well. RNA of both insects was isolated, cDNA was subsequently synthesized and the complete sequence of the ligand binding domain (LBD) of the ecdysone receptor of O. laevigatus (OlEcR-LBD) and N. tenuis (NtEcR-LBD) were determined. Afterwards, the three dimensional structure of LBD was constructed. Finally, the docking of the insecticide molecules in the cavity delineated by the 12 α-helix that composed the EcRLBD was performed. In the case of N. tenuis, it should be noted that in spite of intensive efforts, we did not manage to complete the sequence for the LBD.However, a partial sequence of the LBD was obtained (helix 6-helix 11), and a strong conservation between the amino acids of N. tenuis and O. laevigatus was observed. Results showed no biological activity of methoxyfenozide, tebufenozide and RH-5849, on both predatory bugs. Moreover, modeling of the OlEcR-LBD and docking experiments also suggested that MACs were devoid of any deleterious effect on O. laevigatus. Therefore, our results indicate that these compounds could be safely applied in IPM programs in which O. laevigatus and N. tenuis are present.
Resumo:
Summary Both in the remote origin of the city and the more recent one of urbanism as a remedial discipline conceived as a means of tackling with the urban and territorial impacts of industrialisation, the relatively balanced relation between town and country was a constant which endured until the progressive fragmentation and separation among the different areas of knowledge and action contributed to create a gap between them both, with disastrous consequences in environmental, social and economical terms. The tasks at hands from the perspective of integral sustainability is to promote a reunion throughout a new culture of territory. Resumen Tanto en los orígenes remotos de la ciudad como en los recientes del urbanismo como disciplina surgida para mitigar el impacto urbano y territorial del industrialismo, la relación relativamente equilibrada entre campo y ciudad fue una constante que se mantuvo hasta que la progresiva fragmentación entre áreas de conocimiento y de intervención contribuyó a un paulatino desencuentro entre ambos, de desastrosas consecuencias en términos sociales, ambientales y económicos. La tarea que se presenta desde la óptica de la sostenibilidad integral es propiciar el reencuentro a través de una nueva cultura del territorio