Volume de aplicação na qualidade da deposição da pulverização na cutura do algodoeiro
Carregando...
Arquivos
Data
2014-02-14
Autores
Peres, André Júnio Andrade [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
Na agricultura, há tendência de diminuir o volume de aplicação dos produtos fitossanitários com intuito de aumentar a capacidade operacional dos pulverizadores e consequentemente diminuir os custos da operação, porém, sem prejudicar a eficiência do controle. As considerar que volumes menores podem ser suficientes para atender os objetivos propostos no manejo fitossanitário da cultura do algodoeiro, o presente estudo foi dividido em dois experimentos. O experimento 1 objetivou avaliar a qualidade de aplicação simulando uma pulverização à taxa variada, com variação do volume. A aplicação foi realizada em algodoeiro com espaçamento de 0,45 m com altura média de 0,85 m utilizando a ponta ULD 120-04. A calda foi constituída por água e o marcador Rhodamina B. Os volumes de aplicação foram 100 e 130 L/ha. Antes da aplicação, para cada volume, foram demarcados com auxílio de GPS, 15 pontos onde foram coletadas folhas da parte superior das plantas. A velocidade de deslocamento do pulverizador alcançada em cada ponto foi registrada pelo controlador eletrônico de pulverização da máquina aplicadora. Com estes dados foi possível obter as pressões de trabalho nas respectivas velocidades. A deposição da pulverização nas folhas foi analisada em espectrômetro de fluorescência; o espectro de gotas gerado nas pressões de trabalho foi determinado em analisador de gotas a laser e a análise do perfil de distribuição feito em mesa de testes para bicos hidráulicos. O experimento 2 objetivou avaliar o efeito da variação do volume de aplicação utilizando-se pontas de jato plano e jato cônico com variação de pressão de trabalho e velocidade de deslocamento sobre os depósitos da pulverização. A aplicação foi realizada em algodoeiro com espaçamento de 0,45 m e altura...
In agriculture, there is tendency to reduce the application rate of pesticides with intention to increase the operating capacity of sprayers and decrease costs, however, without affecting the efficiency of control. Considering that smaller volumes may be sufficient to achieve the goal to management of pesticides on cotton crop, this study consisted on conducting of two experiments. The first experiment aimed to evaluate the quality of application, simulating an application with variable rate, varying the application rate. The application in this experiment occurred on a crop with 0.45 m of line spacing, 0.85 m of average heigth of plants, and it was utilized for the pulverization the tip ULD 120-04. The spray liquid utilized in this experiment was composed by water and marker Rhodamina B. The application rate were 100 and 130 L/ha. Before proceeding with these application, were demarcated 15 points with a GPS (Global Position System), where were collected leaves of the top of cotton plants. An electronic controller recorded the forward speed of the sprayer in each of the fifteen points. With these data, it was possible to obtain the respective operating pressures of each application point marked. Deposition was examined in a fluorescence spectrometer; droplet spectrum generated in work pression, it was determined with a laser analiser drops, and the analysis of distribution profile, it was determined in a test table for hidraulic nozzles. The second experiment aimed to evaluate the effect of variation of application rate with different pressures and forward speeds. This analysis occurred with nozzles flat fan and conical on the spray deposit. The application in this experiment occurred on a crop with 0.45 m of line spacing, 0.75 m of average height of plants. The experimental design was randomized block with six treatment and four replications in factorial arrangement 2 x 3 (two spray tips and three ...
In agriculture, there is tendency to reduce the application rate of pesticides with intention to increase the operating capacity of sprayers and decrease costs, however, without affecting the efficiency of control. Considering that smaller volumes may be sufficient to achieve the goal to management of pesticides on cotton crop, this study consisted on conducting of two experiments. The first experiment aimed to evaluate the quality of application, simulating an application with variable rate, varying the application rate. The application in this experiment occurred on a crop with 0.45 m of line spacing, 0.85 m of average heigth of plants, and it was utilized for the pulverization the tip ULD 120-04. The spray liquid utilized in this experiment was composed by water and marker Rhodamina B. The application rate were 100 and 130 L/ha. Before proceeding with these application, were demarcated 15 points with a GPS (Global Position System), where were collected leaves of the top of cotton plants. An electronic controller recorded the forward speed of the sprayer in each of the fifteen points. With these data, it was possible to obtain the respective operating pressures of each application point marked. Deposition was examined in a fluorescence spectrometer; droplet spectrum generated in work pression, it was determined with a laser analiser drops, and the analysis of distribution profile, it was determined in a test table for hidraulic nozzles. The second experiment aimed to evaluate the effect of variation of application rate with different pressures and forward speeds. This analysis occurred with nozzles flat fan and conical on the spray deposit. The application in this experiment occurred on a crop with 0.45 m of line spacing, 0.75 m of average height of plants. The experimental design was randomized block with six treatment and four replications in factorial arrangement 2 x 3 (two spray tips and three ...
Descrição
Palavras-chave
Algodão - Cultivo, Algodão - Doenças e pragas, Defensivos vegetais - Tecnologia de aplicação, Equipamento de pulverização, Cotton
Como citar
PERES, André Júnio Andrade. Volume de aplicação na qualidade da deposição da pulverização na cutura do algodoeiro. 2014. vi, 48 f. Dissertação (mestrado) - Universidade Estadual Paulista “Julio de Mesquita Filho” , Faculdade de Ciências Agronômicas de Botucatu, 2014.