https://repositorio.ufu.br/handle/123456789/20865 2026-10-12T01:44:24Z https://repositorio.ufu.br/handle/123456789/50504 Title: Potencial de Bipolaris crotonis como agente de controle biológico do capim-pé-de-galinha (Eleusine indica) Abstract: Goosegrass (Eleusine indica) is a widely distributed weed in agricultural and forest production systems, characterized by high competitive ability and increasing reports of resistance to chemical herbicides. This scenario has intensified the search for alternative control methods, especially biological control strategies. The present study aimed to evaluate the potential of the fungus Bipolaris crotonis as a biological control agent against E. indica. The fungal isolate was obtained from seeds of the target weed showing disease symptoms, collected in the municipality of Monte Carmelo, Minas Gerais, Brazil. Morphological and molecular analyses were performed to confirm the identity of the isolate. Pathogenicity was assessed through inoculation of mycelial discs onto healthy plants, fulfilling Koch’s postulates. Subsequently, the biocontrol potential of the fungus was evaluated through the application of a conidial suspension produced in a biphasic medium, at a concentration of approximately 1 × 10⁶ conidia mL⁻¹. Inoculated plants showed progressive development of necrotic leaf lesions, ultimately leading to plant death. At the end of the evaluation period, an average control rate of approximately 83% was observed, classified as “good” according to the scale proposed by the Brazilian Society of Weed Science. Additionally, this study represents the first record of Bipolaris crotonis associated with Eleusine indica in Brazil, expanding current knowledge on the geographic distribution of this pathogen. The results indicate that B. crotonis shows promising potential as a bioherbicide and may be incorporated into integrated weed management strategies, contributing to the reduction of reliance on chemical herbicides in agricultural and forest systems. 2026-03-05T00:00:00Z https://repositorio.ufu.br/handle/123456789/49785 Title: Índice de estratificação do carbono orgânico em um Latossolo vermelho sob diferentes sistemas de uso e manejo 2026-07-15T00:00:00Z https://repositorio.ufu.br/handle/123456789/49226 Title: Influência de cancro na madeira de Khaya ivorensis⁠ Abstract: The genus Khaya, introduced to Brazil around the 1970s, has established itself as a promising alternative for the production of high-quality wood, especially the species Khaya ivorensis A. Chev., known as African mahogany. Although exotic, it shows excellent adaptation to Brazilian edaphoclimatic conditions, but its performance has been compromised by canker disease, mainly caused by Lasiodiplodia theobromae. This work aimed to compare the physical and mechanical properties of K. ivorensis wood from trees with and without canker. Equilibrium hygroscopic moisture, basic density, deformations in the axial, radial and tangential planes, volumetric variation and static bending strength were evaluated. The results showed that the presence of canker significantly raised the basic density of the wood and altered radial and tangential deformations, as well as volumetric variation, compromising its dimensional stability. On the other hand, no statistically significant differences were observed in bending strength between the treatments. These findings provide support for management strategies and raw material selection aimed at minimizing losses and improving the utilization of African mahogany wood. 2026-03-02T00:00:00Z https://repositorio.ufu.br/handle/123456789/49049 Title: Uso do escaneamento a laser terrestre na estimativa de atributos florestais a partir de coletas ao nível do solo: um mapeamento cienciométrico 2026-03-05T00:00:00Z