Características da pulverização produzida por pontas Yamaho da série 'D'

This study evaluated the characteristics of spray produced by Yamaho nozzle tip'D'series. The droplet size of nozzle tips D3, D4, D5, D6 and D8 were evaluated at 703, 1.050, 1.406, 1.758, 2.110, 2.461 e 2.813 kPa pressures (100, 200, 250; 350, e 400 psi) by means of laser equipment, as well as the flow rate of nozzle tip at the pressures of 702, 1.125, 1.406, 1.828, 2.110, 2.532 e 2.813 kPa (100, 160, 200, 260,300; 360 e 400 psi) which were compared with values indicated by manufacturer. The droplet produced at all pressures presented a very fine spray, which in agriculture may promote losses by evaporation and drift. For all nozzle tips, except D8 in pressures 1.828, 2.532 e 2.813 kPa, the difference between the observed flow rate indicated by the manufacturer was higher than 5%. The paper demonstrates that the nozzle tip tested, in spite of not having uniform flow rate, may promote the contamination of spray operator and environment due to the droplet spectrum produced.

Spray Nozzles, Pressures, Additives and Stirring Time on Viability and Pathogenicity of Entomopathogenic Nematodes (Nematoda: Rhabditida) for Greenhouses

The objective of this study was to evaluate different strategies for the application of entomopathogenic nematodes (EPN). Three different models of spray nozzles with air induction (AI 11003, TTI 11003 and AD-IA 11004), three spray pressures (207, 413 and 720 kPa), four different additives for tank mixtures (cane molasses, mineral oil, vegetable oil and glycerin) and the influence of tank mixture stirring time were all evaluated for their effect on EPN (Steinernema feltiae) viability and pathogenicity. The different nozzles, at pressures of up to 620 kPa, were found to be compatible with S. feltiae. Vegetable oil, mineral oil and molasses were found to be compatible adjuvants for S. feltiae, and stirring in a motorized backpack sprayer for 30 minutes did not impact the viability or pathogenicity of this nematode. Appropriate techniques for the application of nematodes with backpack sprayers are discussed. © 2013 Moreira et al.

Volume de aplicação na qualidade da deposição da pulverização na cutura do algodoeiro

Pós-graduação em Agronomia (Agricultura) - FCA

Otimização da tecnologia de assistência de ar em pulverizador de barras através da umidificação do fluxo de ar

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Ácaro da mancha-anular do cafeeiro: controle em função da cobertura pela calda com ramais e volumes de aplicação

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Modelagem matemática e análise dinâmica da torre de um pulverizador de pomares

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito do tamanho do alvo e condições operacionais sobre a uniformidade de deposição de pulverizações em pré-emergência

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Inspeção periódica de pulverizadores: análise dos erros de calibração e impacto econômico

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Classificação e eficiência de materiais e de vestimentas de proteção no trabalho com agrotóxico

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Segurança no trabalho de aplicação de agrotóxicos com o pulverizador de pistolas em citros

The purpose of this study envisaged the quantification of skin and respiratory exposures occasioned by work conditions during pesticide spraying of citrus fruits using hand gun sprayers; the evaluation of the efficiency of individual and group protection measures for the workers; the determination of workers' most exposed body regions; and the classification of work conditions, with and without the tested work-safety protection measures as recommended for the registered pesticides used to control the main pests and diseases that attack these types of trees and fruits. The AZR protection equipment proved to be the most efficient for the tractor driver, when spraying using pistol sprayers. The two sets of individual protection equipment that were checked also proved to be efficient. The most exposed regions of the tractor driver's body were the thighs, the front of the legs, the feet and hands. The most exposed regions of the individual sprayer working on foot were the hands and feet.

Qualidade da pulverização em volume reduzido para o controle do bicho-mineiro Leucoptera coffeella (Guérin-Mèneville & Perrottet, 1842) (Lepidoptera: Lyonetiidae)

Pós-graduação em Agronomia (Entomologia Agrícola) - FCAV

Aplicação de produtos fitossanitários na cultura dos citros utilizando pulverizador envolvente

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Avaliação da deposição e da agitação de calda em reservatórios de pulverizadores agrícolas utilizando uma análise numérica (CFD) e experimental

Pós-graduação em Engenharia Mecânica - FEB

Adjuvantes na deposição de aplicações aéreas e terrestres

The Asian rust currently is the main disease of soybean culture, having as characteristics the difficult control, by start at the bottom of plants where penetration of the droplets is harder. The fine droplets has been used with the intention of improve the penetration and increase efficiency of agrochemicals, but that are losses by drift easily. New products have been developed to increase deposition of the drops at targets. The aim of this work was evaluate the TA- 35 capacity to improving the deposition of fungicides spray solution with or without mineral oil by aerial and ground applications. Was used a factorial 3x2, three spray solutions composed by Priori Xtra (concentrated suspension of azoxystrobin 200 g L-1 + cyproconazole 80 g L-1 ) mixed with adjuvants, Nimbus (emulsifiable concentrate containing aliphatic hydrocarbons 428 g L-1 ) and TA-35 (soluble concentrate containing sodium lauryl ether sulfate, surfactants, sequestering agents and emulsifiers), in aerial and ground applications. In ground applications was used 50 L ha-1 , TXA 8002 VS spray nozzles and on aerials was used 15 L ha-1 , Turboaero atomizer, both applying fine droplets. Was utilized the Brilliant Blue (FD & C n. 1) tracer to determine the deposits. There were used glass slides as targets to collect spray droplets. After to extract the tracer of the targets using distilled water, the samples were analyzed by spectrophotometry, thereby was possible quantify the tracer deposited on each glass slide. A study to evaluate possible losses of the tracer by degradation or retention also was done. The comparative analysis of treatments was done by statistical method "Confidence Interval for Differences Between the Averages" with 95% of confidence degree (IC95%). There was degradation or retention of the tracer between the processes of application of the droplets and the processing of the samples. The deposition averages with the presence of TA-35 were greatest for both sprayers however, there were not significant differences among the treatments. The viability of TA-35 use may consider other parameters or complementary studies.

Inspeção periódica de pulverizadores nas principais regiões de produção de soja no Brasil

The aim of this study was to evaluate the evolution of calibration and maintenance practices for crop sprayers on soybean production areas in Brazil, in the 2006 and 2007 seasons, based on the Project IPP data. Therefore, the evaluation covered issues related to calibration, maintenance condition and the main components of 103 sprayers distributed in the following states: Rio Grande do Sul (35), Paraná (60), and, Mato Grosso do Sul (8). The evaluations were done at the rate of one sprayer per farm. The most frequent problems were related to the pressure gauge, spray leaks and calibration errors greater than 50% of the desired volume rate. The analysis of the application rate showed a tendency for the farmers to apply volume rates below the desired value. In 2006 the errors of the application rate were significant, with 70.4% for Rio Grande do Sul State, 74.5% for Paraná State and 37.5% for Mato Grosso do Sul State. In 2007 there was a reduction of errors, with averages of 50.0% for Rio Grande do Sul and 66.7% for Paraná. In general terms, the results showed improvements on the use, maintenance and calibration processes for crop sprayers on the areas covered by the Project IPP, with reductions on average indexes for calibration errors, leaks and bad tips, among other issues.