https://repositorio.ifgoiano.edu.br/handle/prefix/137 2026-03-12T22:03:51Z https://repositorio.ifgoiano.edu.br/handle/prefix/6313 Título: SUBSTITUIÇÃO DO ACEFATO POR ISOXAZOLINA + PIRETRÓIDE EM UM MANEJO QUÍMICO ROTACIONADO CONTRA Dalbulus maidis, COM CONSEQUÊNCIAS FITOSSANITÁRIAS E PRODUTIVAS, PARA MILHO SAFRINHA Autor(es): Silva, Frederico de Melo Primeiro Orientador: Pereira, Alexandre Igor Azevedo Abstract: The corn leafhopper, Dalbulus maidis (DeLong & Wolcott) (Hemiptera: Cicadellidae), the vector of the corn stunt disease complex, is among the principal constraints to maize production in Brazil, demanding integrated management programs that rotate insecticidal modes of action (MoA). However, experimental comparisons that explicitly connect spray programs to maize phenology while contrasting distinct MoA remain scarce. We evaluated, in the hybrid MG540 grown under rainfed second-season conditions, the agronomic relevance of two sequential foliar spray programs on vector populations, stunt incidence, and grain yield. The trial followed a randomized complete block design with three treatments (T). T1 was an absolute, water-only control. T2 comprised thiamethoxam + lambda-cyhalothrin at VE, three sequential applications of isocycloseram + lambda-cyhalothrin at 5-7 day intervals, one application of profenofos + cypermethrin, and two applications of acetamiprid + lambda-cyhalothrin (at 14-day intervals). T3 followed the same calendar as T2, but replaced isocycloseram + lambda-cyhalothrin with acephate in the three central sprays. Throughout vegetative development, we periodically monitored (per 1 m row) the number of leafhoppers per plant, the percentage of plants with leafhoppers, and the percentage of plants showing stunt symptoms. These metrics were paired with control efficacy (EC%) corrected by the Henderson–Tilton method. At the end of the phenological cycle, grain yield (sacks ha⁻¹; 60-kg sacks) was estimated for each treatment. Both time (spray calendar) and treatment effects were significant for all periodic parameters and their corresponding EC%. T2 sustained more stable suppression during the intermediate window, with a peak around 5-7 days after application of the fourth spray (5-7 DAA4), whereas T3 produced a stronger initial knock-down effect followed by mid-cycle instability. Stunt incidence emerged late, with the hierarchy T1 > T2 > T3, and higher early-outbreak efficacy under T2. For yield, T2 reached 161.19 ± 19.00 sacks ha⁻¹, T3 achieved 138.00 ± 18.00 sacks ha⁻¹, and T1 only 92.00 ± 22.00 sacks ha⁻¹. Overall, the application program embodied by T2 combined consistent vector suppression, mitigation of stunt expression, and high yield. Intensive monitoring from VE to V4, rotation of MoA with substitution toward newer insecticides, and reapplications scheduled between 5-7 days after the third to fifth applications (5-7 DAA3 and 5-7 DAA5) emerge as actionable findings to help growers manage high D. maidis pressure more decisively, protectively, and productively under field conditions. Editor: Instituto Federal Goiano Tipo: Dissertação 2026-02-16T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6289 Título: ABORDAGEM CTSA: UMA PROPOSTA PARA O ENSINO DE TERMOQUÍMICA SOB O OLHAR DA DIDÁTICA COMPLEXA E TRANSDISCIPLINAR Autor(es): Assunção, Hélica Lucivane Silva Primeiro Orientador: Carvalho, Christina Vargas Miranda e Primeiro Membro da Banca: Suanno, Marilza Vanessa Rosa Segundo Membro da Banca: Souza, Paulo Vitor Teodoro de Abstract: This research was developed within the scope of the Professional Graduate Program in Teaching for Basic Education (PPG-EnEB), considering research line “Teaching Methodologies and Technologies”. We sought to understand the challenges of articulating the Science, Technology, Society and Environment (STSE) approach to the teaching of Thermochemistry, from the perspective of Complex and Transdisciplinary Didactics. The general objective focused on implementing Thermochemistry teaching situations grounded in the STSE approach under the perspective of complex and transdisciplinary didactics and emerging pedagogical trends, aiming to promote critical, contextualized, and socially relevant learning in Basic Education. To this end, a qualitative methodology of an applied nature was adopted, involving a theoretical-epistemological analysis of references such as the complex thinking of Edgar Morin, the transdisciplinarity proposed by Hilton Japiassu and Basarab Nicolescu, the self-hetero-ecoformation concept of Gaston Pineau, and ecopedagogy grounded in Paulo Freire and Moacir Gadotti, as well as Complex and Transdisciplinary Didactics as developed by Marilza Suanno. These references supported the development and implementation of a didactic sequence as an educational product aimed at second-year high school students. The results indicate that articulating the STSE approach based on complex and transdisciplinary didactics favors the construction of critical-reflective learning, the integration of scientific knowledge with socio-environmental contexts, the development of complex ways of thinking through the reconnection of knowledge, and the strengthening of students’ autonomy in the teaching of Thermochemistry. It was possible to conclude that this dialogue offers consistent theoretical-epistemological foundations for organizing pedagogical practices committed to citizenship education and to transforming teaching and learning processes in Science. Editor: Instituto Federal Goiano Tipo: Dissertação 2026-02-23T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6280 Título: PLANO DE MANEJO COM INSETICIDAS E INDUTOR DE RESISTÊNCIA PARA O CONTROLE DE Dalbulus maidis E FITOPATÓGENOS ASSOCIADOS AO MILHO-DOCE Autor(es): Silva, Adriano de Almeida Primeiro Orientador: Pereira, Alexandre Igor Azevedo Abstract: The corn leafhopper Dalbulus maidis (Hemiptera: Cicadellidae) is the main vector of yield-limiting pathogens in sweet corn in Brazil. The use of new-generation insecticides combined with application frequency and different active ingredients, as well as plant defense inducers, is still an underutilized control strategy. These practices are aligned with Integrated Pest Management (IPM) and can reduce the negative impacts caused by maize rayado fino virus, one of the major pathogens in sweet corn transmitted by D. maidis in the state of Goiás, Brazil. This study evaluated the effectiveness of integrated crop-protection strategies involving the number of weekly applications of insecticidal products with different modes of action, with or without the resistance inducer acibenzolar-S-methyl (ASM), for controlling D. maidis and mitigating virus-related damage in the sweet corn hybrid GSS0227, as well as their effects on yield and industrial recovery under real field conditions. The experiment followed a randomized complete block design with eight treatments in a 3×2+2 factorial arrangement, comprising one, two, or three weekly insecticide application schedules, the absence or presence of ASM, and two controls (negative and positive). The assessed variables were the number of leafhoppers per plant, visual symptoms of maize rayado fino virus, yield (t ha⁻¹), and industrial recovery (%). Significant effects of application intensity and ASM, as well as their interaction, were observed for vector density and yield components. The negative control showed the highest infestation (>2.8 leafhoppers per plant), the highest symptom incidence (>50%), and the lowest yield (<18 t ha⁻¹) and industrial recovery (<35%). Insecticide-only programs provided partial control, reducing the population to 2.1–2.6 leafhoppers per plant and symptom incidence to 35–45%, with modest gains in yield (20–23 t ha⁻¹) and industrial recovery (38–43%). In contrast, adding ASM increased management efficiency, reducing infestation to 1.7–2.0 leafhoppers per plant and symptom incidence to 25–30%, while increasing yield (23–25 t ha⁻¹) and industrial recovery (44–48%). The best performance was achieved by the positive control program, which combined regular applications with systematic ASM use, reaching <1.6 leafhoppers per plant, ~22% symptomatic plants, yield >25 t ha⁻¹, and industrial recovery >48%. We conclude that integrating insecticide application intensity with the strategic use of ASM maximizes D. maidis control, reduces maize rayado fino expression, and simultaneously increases sweet corn yield and industrial recovery, representing a high-impact approach for IPM programs in regions under strong virus pressure. Editor: Instituto Federal Goiano Tipo: Dissertação 2025-12-08T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6268 Título: DELIMITAÇÃO DE UNIDADES DE PAISAGEM APLICADA A BACIAS HIDROGRÁFICAS, UTILIZANDO PARÂMETROS GEOMORFOMÉTRICOS E EDÁFICOS Autor(es): Queiroz, Alinne de Assis Veras Primeiro Orientador: Angelini, Lucas Peres Primeiro Membro da Banca: Angelini, Lucas Peres Segundo Membro da Banca: Moura, Derick Martins Broges de Terceiro Membro da Banca: Silva Júnior, Édio Damásio Abstract: There are many methods for environmental assessment contributing to maintain ecosystem services, enabling more sustainable use of natural resources and reducing environmental problems. Landscape Unit (LU) Assessment Method stands out among different ones, which is a product of the official Environmental and Productive Zoning (ZAP, Brazilian acronym) manual from Minas Gerais State, a tool designed to develop and monitor economic, social, and environmental management plans. However, the subjectivity in delimitating these units emerges as a challenge, potentially compromising the results accuracy and the environmental analyses effectiveness. Therefore, this paper focuses on delimitating the Landscape Units by geomorphological parameters basing on terrain shape variables (horizontal and vertical curvature), slope, and edaphic characteristics to assist in soil vulnerability and suitability analyses in the VerdinhoRiver watershed. These data were analyzed and considered to generate a detailed classification of Landscape Units, enabling to identify zones with geomorphological and soil characteristics; finally allowing analyzing the units according to their uniqueness in relatively homogeneous natural aspects. The results indicate that the proposed methodology helped to reduce subjectivity in unit definition, making the process more replicable and coherent. Furthermore, the delimited units show a direct relationship with different levels of soil vulnerability and suitability, contributing to more efficient territorial planning. It is concluded that the adopted approach may support future studies, contributing to identify priority areas for conservation and sustainable use. The integration of geospatial technologies proved to be an effective tool for delimiting the Landscape Units, providing greater accuracy in environmental analysis and decision-making support. Editor: Instituto Federal Goiano Tipo: Dissertação 2024-12-01T00:00:00Z