Caracterização da pulverização de mistura de tanque com diferentes pontas de jato plano

• Ano de defesa: 2014
• Autor(a) principal: Jesus, Marcella Guerreiro de [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Produtos quimicos agricolas - Adjuvantes; Defensivos vegetais - Tecnologia de aplicação; Pulverização; Agricultural chemicals
• Link de acesso: http://hdl.handle.net/11449/110946

The evolution of methods of food production is setting new parameters on the final product quality. Thus, awareness programs grow increasingly which allows the new information to reach at the production field. This study aimed to analyze the interactions between fungicides and adjuvants in tank mixes, using different types of spray nozzles. The test was conducted with 15 treatments, consisting of two fungicides, an insecticide and adjuvants based on mineral oil, vegetable oil and surfactant. We used the tips jet plane (XR), air induction (AIXR) and jet impact (TT) plan. The addition of adjuvants in test solutions followed the patterns indicating the manufacturers of pesticides (addition or not of oil in the syrups), along with fiel d practices used by farmers, represented by the partial or total replacement of oil - based adjuvant surfactants. To determine the interference of adjuvants in spray mixes, there were four analysis: spectral of droplets, surface tension, viscosity and measur ing the length of the liquid film formed at the exit orifice of the spray nozzles. The readings of the droplet spectrum were using particle analyzer equipment in real time (laser diffraction); the evaluation of surface tension used the gravimetric method ( drop weight); the viscosity was analyzed in rotary viscometer and the evaluation of the size of the liquid film was performed by image analysis. The average results for each evaluation were compared using the confidence interval for the differences betwee n the ratings, at 95% probability (95% CI). The results demonstrated an increase in the DMV and reducing the percentage of less than 100 microns with the addition of surfactant adjuvants based on partial substitute for oil in treatments engeo Full drops, w hile the behavior was reversed in test solutions with Fox fungicides and Aproach Press. This inversion should be observed from the point of view of the different ...