https://repositorio.ifgoiano.edu.br/handle/prefix/5853 2026-03-17T06:53:52Z https://repositorio.ifgoiano.edu.br/handle/prefix/6328 Título: ASSOCIAÇÃO DE FUNGICIDAS QUÍMICOS E BIOLÓGICOS NO CONTROLE DE DOENÇAS E NA PRODUTIVIDADE DA SOJA Autor(es): Teixeira, Frederico Landim Primeiro Orientador: Marques, Míriam de Almeida Abstract: Soybeans stand out as one of the most important crops in Brazilian agribusiness, with significant economic importance and a strategic role in various production chains. Despite continuous growth in productivity, the crop is vulnerable to various diseases that compromise its performance. Among the challenges faced are leaf diseases, whose damage reduces photosynthetic efficiency and directly affects crop yield. This study evaluated the effectiveness of the combination of chemical and biological fungicides in controlling these diseases and in soybean productivity through a field experiment conducted in the 2023/2024 harvest using the Olimpo cultivar. The experimental design was randomized blocks with seven treatments and four replicates, including different combinations of active ingredients in four distinct applications throughout the crop cycle. Variables such as disease incidence and severity, defoliation, productivity (bags/hectare), and thousand-grain weight were evaluated. The data were statistically analyzed based on analysis of variance and Tukey's test at 5%. The results indicated that treatments containing Bacillus pumilus in the first two applications, combined with the use of Chlorothalonil in the last applications, performed best in controlling target spot, resulting in lower severity and defoliation rates. For brown spot, there was no significant difference between the fungicide molecules evaluated and the control treatment. Regarding grain yield and weight, the same treatments with Bacillus pumilus and Chlorothalonil showed numerical advantages, although without statistically significant differences. It is concluded that the integration of bio-inputs and chemical fungicides is a promising alternative in soybean phytosanitary management, especially in the control of target spot, promoting agronomic gains and contributing to more sustainable agricultural practices. However, the need for further research under different disease pressure conditions is emphasized, in order to validate and expand the results obtained. Editor: Instituto Federal Goiano Tipo: Trabalho de Conclusão de Curso 2025-10-16T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6326 Título: AGRICULTURA SUSTENTÁVEL COM O USO DE BACTÉRIAS PROMOTORAS DE CRESCIMENTO Autor(es): Leite, Allana Mayara de lesus Santos Oliveira Primeiro Orientador: Souza, Tenille Ribeiro de Abstract: Plant growth-promoting bacteria (PGPB) are beneficial microorganisms that play a fundamental role in sustainable agriculture by stimulating plant development through direct and indirect mechanisms. Direct mechanisms include biological nitrogen fixation, phosphorus solubilization, and the production of phytohormones—such as auxins, glyberellins, and cytokines, among others—while indirect mechanisms include competition for nutrients and niches, the production of antibiotics and lytic enzymes, and the induction of systemic resistance in plants. For example, certain Bacillus species can produce antibiotics that inhibit Fusarium spp. (which cause plant diseases), while Pseudomonas can induce systemic resistance, making plants more resistant to multiple phytopathogens. The use of PGPB can reduce dependence on agricultural chemical inputs, improve soil health, and increase crop productivity, contributing to more environmentally friendly and sustainable agricultural practices. This work is based on a bibliographic review and analysis of recent studies that demonstrate the agronomic potential of these bacteria as bioinputs, discussing their benefits, mechanisms of action and challenges for their efficient application in different production systems. Editor: Instituto Federal Goiano Tipo: Trabalho de Conclusão de Curso 2025-09-13T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6315 Título: REVISÃO BIBLIOGRÁFICA SOBRE O USO DE BIOINSUMOS A BASE DE ASCOPHYLLUM NODOSUM E DE BACTÉRIAS DO GÊNERO AZOSPIRILLUM COMO PROMOTORES DO CRESCIMENTO VEGETAL. Autor(es): Oliveira, Erica Alves Primeiro Orientador: Tavares, Germanna Gouveia Primeiro Membro da Banca: Tavares, Germanna Gouveia Segundo Membro da Banca: Ribeiro, Tenille Terceiro Membro da Banca: Silva, Cintia Faria da Abstract: Bioinputs obtained from brown seaweed (Ascophyllum nodosum) and plant growth-promoting microorganisms (PGPB), such as Azospirillum spp., have been widely studied for their ability to increase plant vigor, nutrient use efficiency, and tolerance to abiotic stresses, resulting in productivity gains. Recent reviews and meta-analyses indicate consistent effects in annual and perennial crops, explained by multiple mechanisms: hormonal modulation, elicitation of defense responses, improvement in root architecture, and nitrogen fixation/assimilation. Evidence of direct co-application of A. nodosum + Azospirillum is still limited, but suggests complementary mechanisms. It is concluded that combined use, if appropriately positioned (dose, timing, application route), is promising for sustainable intensification. Editor: Instituto Federal Goiano Tipo: Trabalho de Conclusão de Curso 2025-10-11T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6235 Título: USO DE Bacillus megatherium PARA SOLUBILIZAÇÃO DE FÓSFORO NA CULTURA DA SOJA Autor(es): Souza, Mykaelle Moreira de Abstract: To increase soybean productivity in the cerrado, phosphorus-solubilizing microorganisms are being used as an alternative to improve the efficiency of phosphorus use in the soil, making it available to plants. In this study, the addition of phosphorus-solubilizing bacteria (Bacillus megaterium) can contribute to greater phosphorus availability and enhanced crop growth, as these bacteria also act as plant growth promoters. The treatments implemented in this study were: T1 = no phosphorus supply and no Bacillus megaterium inoculation; T2 = only phosphorus supply and no Bacillus megaterium inoculation; T3 = no phosphorus supply and inoculated with Bacillus megaterium; T4 = with recommended phosphorus supply and inoculated with Bacillus megaterium in soybeans. The response variables analyzed were: shoot fresh weight, root fresh weight, diameter, height, and number of pods. Root fresh weight had greater weight when the treatments received phosphorus fertilization. Soybeans had a greater height in cm, a greater diameter in mm and more pod units when fertilized with phosphorus and inoculated with Bacillus megaterium, making the association of fertilization with the biological inoculant favorable on the productive response of soybeans. Editor: Instituto Federal Goiano Tipo: Trabalho de Conclusão de Curso 2026-02-27T00:00:00Z