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Sobrevivência de Dalbulus maidis em plantas hospedeiras alternativas na entressafra de milho
(Universidade Federal de São Carlos, 2023-10-24) Arcangeli, Geovana Alves; Marques, Rodrigo Neves; https://lattes.cnpq.br/8945237946471247; Gazaffi, Rodrigo; https://lattes.cnpq.br/4506894662453338; https://lattes.cnpq.br/3144812202867916
Corn plays a fundamental role in Brazil and globally, being an essential crop for both human and animal nutrition. Furthermore, it serves as an essential raw material for the production of a variety of products, including beverages, fuels, polymers and others. However, several factors can influence corn productivity, such as soil, climate, cultivar, cultural practices and management of pests, diseases and weeds. This scenario becomes even more challenging with the second harvest or 'safrinha' which can contribute to the permanence of hosts in favorable conditions in the field, this can provide a greater incidence of pests and/or diseases caused by insect vectors, such as Dalbulus maidis (corn leafhopper). Studies regarding the survival capacity of the corn leafhopper on alternative host plant species, that is, species that can serve as shelter and/or food during the off-season, are still scarce. In this context, it is essential to identify possible host plants and determine insect vector management to minimize losses attributed to the corn leafhopper. The objective of this work was to evaluate the survival and development of corn leafhoppers on plants. Weed species were selected because they have a similar botanical classification to corn or due to their common occurrence in corn fields. For survival tests, two tests were carried out: on groups of plants and on individual plants, where the survival, oviposition and “bridge” of insects were evaluated. Survival assessments were carried out daily after the leafhoppers were confined in cages until all insects died. Oviposition assessments were carried out seven days after infestation. To do this, the leaves were detached from the plants and cut into smaller sizes to count the eggs using a stereoscopic microscope. The existence of several species of weeds can provide refuge and food, prolonging longevity, at least for a part of the leafhopper population. It is likely that, in agricultural environments, these weeds play a role in harboring populations of migrating leafhoppers from recently harvested corn fields, thus ensuring the survival of some of these insects until the emergence of new seedlings in the area. However, it is a fact that corn plants play a very important role in the survival of Dalbulus maidis in crops, and the presence of volunteer corn plants, staggered, late and continuous plantings can play a fundamental role in the population increase observed in recent harvests. Considering the data obtained, weeds are of marginal importance in maintaining Dalbulus maidis populations.
#juntospelolivro: discursos e práticas de promoção do livro e da leitura em tempos de crise política e de pandemia da COVID-19
(Universidade Federal de São Carlos, 2023-10-24) Mariano, Laura Andreoli; Ferreira, Luzmara Curcino; https://lattes.cnpq.br/4849994635754652; https://orcid.org/0000-0003-3555-1446; https://lattes.cnpq.br/2442735951407047
En esta disertación, a través de un meticuloso análisis de los enunciados obtenidos de la campaña #juntospelolivro, ampliamente difundida en Instagram, llevamos a cabo un estudio de su conexión con ciertos discursos acerca del libro y la lectura. La singularidad de los enunciados de esta campaña, que tiene como objetivo promover la lectura y el libro, se enmarca en el contexto de los desafíos políticos y de salud que enfrentó Brasil entre 2018 y 2022. Para esta investigación, nos apoyamos en los principios teóricos de los estudios del discurso según Michel Foucault (1970; 1987) y Possenti (1999; 2001); además, consideramos las perspectivas de los estudios históricos y culturales sobre el libro y la lectura según Roger Chartier (1998, 1999, 2002; 2003), Abreu (2001a; 2001b; 2006), Barzotto & Britto (1998), Curcino (2010; 2016; 2018; 2019; 2020), entre otros notorios autores. Nuestro análisis se centró en la identificación de patrones temáticos recurrentes en estos enunciados de la campaña, junto con la descripción de aspectos de su expresión lingüística, en combinación con elementos visuales. Lo que distingue esta campaña de las muchas otras contemporáneas de promoción de la lectura y el libro en las redes sociales es la preeminencia de dos temas: las funciones terapéuticas (contra el aburrimiento y la ansiedad) de la lectura y el libro, y su dimensión política, ya sea como forma de resistencia a las políticas gubernamentales en curso que afectan al sector librero, ya sea como un medio para combatir la desinformación que circulaba en ese momento. Entre los resultados de nuestro análisis, cabe destacar la frecuencia y especificidad de las referencias a los beneficios terapéuticos de la lectura y el libro, como una práctica para contrarrestar las consecuencias psicológicas y emocionales del distanciamiento social y el miedo generado por la pandemia de COVID-19. Para ello, también nos apoyamos en los estudios de Biblioterapia, buscando su integración con la Historia de la lectura. En relación con el segundo grupo temático más relevante de enunciados en nuestra investigación, el relacionado con la política, observamos especialmente cuánto se atribuyó a esta práctica el poder de proteger a los lectores contra las noticias falsas, los discursos de odio y las falsedades. Tanto en las publicaciones como en los comentarios a las mismas, observamos formas de autorrepresentación como lectores, que se expresaban con un gran orgullo. Así, tanto los autores de los textos de esta campaña como aquellos que los leyeron y comentaron pudieron compartir su orgullo de ser lectores, lo cual se manifestó de manera notable en la formulación de estos enunciados.
Uso de geoprocessamento para caracterização dos aspectos físicos, uso da terra e diagnóstico ambiental no município de Campina Do Monte Alegre (SP).
(Universidade Federal de São Carlos, 2023-10-24) Carvalho, Giovana Costa; Toledo, André Marcondes Andrade; https://lattes.cnpq.br/1920147531988000; https://lattes.cnpq.br/1064695459454037
The purpose of this research was to employ geoprocessing to analyze the physical aspects and land use to diagnose the environment in areas of permanent preservation (APPs) located in the municipality of Campina do Monte Alegre (SP). The study comprises the following stages: initially, the collection of data relating to the area under study, including planialtimetric maps (scale 1:10,000) and remote sensing products. Then the data was processed, using QGIS 3.32 software, detailing the physical aspects, the land use, in addition to demarcating and qualifying APPs in accordance with Law 12,651/2012. The final environmental diagnosis, overlapping the areas covered with native vegetation current with permanent preservation areas, it was found that the southern region of The municipality presents greater vulnerability with 39% deforested. Confirming thus, the need to recover native vegetation on site.