Seletividade de herbicidas para o eucalipto visando extensão de uso para sistemas agrossilviculturais

• Ano de defesa: 2010
• Autor(a) principal: Tiburcio, Rafael Augusto Soares
• Orientador(a): Ferreira, Francisco Affonso
• Banca de defesa: Cecon, Paulo Roberto , Oliveira Neto, Silvio Nolasco de , Santos, José Barbosa dos
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Fitotecnia
• Departamento: Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de
• País: BR
• Palavras-chave em Português: Eucalipto; Herbicidas; Deriva
• Palavras-chave em Inglês: Eucalyptus; Herbicides; Drift
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
• Link de acesso: http://locus.ufv.br/handle/123456789/4527

The present work was to evaluate the selectivity of herbicides for the culture of eucalyptus, as well as the effect of the drift of herbicides in crops interspersed held this job. In the first experiment in a greenhouse were used herbicide atrazine, nicosulfuron, tembotrione and mixtures formulated foramsulfurom+iodosulfurommethyl and fluazifop-p-butyl+ fomesafen, applied at doses corresponding to 3, 6 and 12% of the recommended dose, 25 days after transplanting in order to study the effect of simulated drift through underdosing. Was evaluated intoxication percentage, height, stem diameter, shoot dry mass and leaf area. Herbicides affected the growth of eucalyptus trees, mainly by limiting the increase in leaf area and dry mass of shoots. We conclude that the risk of productivity losses if there is intoxication by drift is less atrazine, foramsulfurom+iodosulfurom-methyl and tembotrione higher with fluazifop-p-butyl+fomesafen and nicosulfuron. Among the products tested, tembotrione is what has the greatest potential to be used in areas of eucalyptus. In the second experiment conducted under conditions in field conditions in Viçosa, MG, in a randomized block design with 12 treatments and 4 replicates. Treatments were flumioxazin (75, 100 and 125 g ha-1), isoxaflutole (75 and 150 g ha-1), oxyfluorfen (960 g ha-1), sulfentrazone (500 g ha-1), flumioxazin + isoxaflutole (75 +75 g ha-1), flumioxazin + isoxaflutole (100 +75 g ha-1), flumioxazin + sulfentrazone (100 +500 g ha-1), and a control without weeding and hoeing another to evaluate the control efficiency and selectivity of the herbicide flumioxazim eucalyptus. We evaluated intoxication percentage, height and stem diameter of eucalyptus, and control and the dry mass of weeds. We concluded that flumioxazin is selective to the eucalyptus at the doses evaluated, although it can charge any type injury is fully recoverable with the development of plants. Its efficiency of weed control in pre-emergence was better when mixed in the tank with oxyfluorfen and sulfentrazone. However it has the potential to be used in combination, both with sulfentrazone, isoxaflutole as with, since it increases the spectrum of control.