Tecnologia de aplicação de produtos alternativos no controle de Oidium ssp. em eucalipto

• Ano de defesa: 2015
• Autor(a) principal: Barbosa, Marina de Almeida
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Agricultura Tropical; UFES; Programa de Pós-Graduação em Agricultura Tropical
• Palavras-chave em Português: Chemical control; Alternative control; Droplet size; Controle químico; Controle alternativo; Tamanho de gotas; Eucalipto; Pragas - Controle; Fungos; Pulverização; Agronomia; 63
• Link de acesso: http://repositorio.ufes.br/handle/10/8243

The development and application of pesticides are growing worldwide, as, improve the quality of spraying , higher production and lower costs. Added to this the market has given greater importance, increasingly using alternative products in disease control. In eucalyptus cultivation attack pests and diseases such as powdery mildew is common. In view of this fact the application of technology is an essential factor in the control of diseases and pests in agriculture. The aim of this study was to evaluate the physical and chemical characteristics of aqueous solutions used in the application of pesticides , the effectiveness of chemical and alternative fungicides in control of Oidium ssp. , and study the influência of drops of spectrum in the application of these products . The experiments were performed in the Chemistry Laboratories and Plant Pathology North University Center of the Holy Spirit , located in São Mateus - ES and nursery seedlings Fibria company located in Barra do Riacho , in the municipality of Aracruz , ES . Aqueous extracts obtained were tested Mentha x villosa 5 % e10 % and Gingko biloba 5 % and 10 % chemical fungicide tebuconazole + trifloxistrobim 1,0mL.L -1 , no chemical fungicide plant Clean 25mL.L -1 ; sodium bicarbonate 2.000ppm . They evaluated the pH , density , surface tension , analysis of the dry drug solubility , phytochemical analysis of Mentha x villosa extract. The evaluation consisted in the measurement of disease severity , modified to powdery mildew infection in eucalyptus. The experiment was conducted in a completely randomized design with nine treatments , four replications and 30 plants per plot , with 120 plants per treatment. The severity of disease data were submitted to analysis of variance (ANOVA), the statistical system Assistat. To determine the DMV, DEN and COB, were employed in water sensitive labels in the experimental units. For variance analysis, the normality of the severity data was analyzed by the KolmogorovSmirnov test (p <0.05). The significant variables in the F test were subjected to the test medium by Tukey test (p> 0.05). The statistical analysis was performed by the R software and response surfaces analyzed in the Statistica 6.0 software. After phytochemical analysis Mentha x villosa observed the presence , saponin, naphthoquinones tannins and polyphenols. The tebuconazole + 1,0mL.L-1 trifloxistrobim that was better controlled hatred in eucalyptus seedlings, followed by treatment such as xii Gingko biloba extract 10% and baking soda. The volumetric median diameter of spray droplets has no influence on the severity of powdery mildew control, regardless of fungicide.