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| Registros recuperados: 56 | |
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| Silva, Alessandra Fagioli da; Oliveira, Rone Batista de; Gandolfo, Marco Antonio. |
| Spraying practices are highly sensitive to variations in climatic conditions, so it the spatial variability of the number of monthly hours available for the application of pesticides in the state of Paraná, Brazil, was determined and analyzed. An hourly time series of the climatic data obtained from 54 meteorological stations from the Paraná, for the years 2004-2014 was analyzed. To determine the number of monthly hours available to perform the applications, the following conditions were established: temperature < 30°C, relative air humidity > 55%, wind speed between 3 and 12 km h-1, and rainfall less than 0.2 mm h-1. After being cross-referenced, these data were analyzed using descriptive statistics and geostatistics. A high variability of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Application technology; Spraying; Climatic conditions; Geostatistics.; Tecnologia de aplicação; Condições climáticas. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39421 |
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| Vásquez-Castro,Javier Alberto; Baptista,Gilberto Casadei de; Gadanha Junior,Casimiro Dias; Trevizan,Luiz Roberto Pimentel. |
| The goal of this work was to evaluate the effect of spray volume on the moisture of the stored grains of the corn and wheat. Two kg of each type of the grain were placed into the plastic bags and sprayed with the theoretical doses of 0, 1, 3, 5, 8, and 10 liters of water / ton of the grain. The grain moisture content was evaluated 24 h after the spray operation by the oven method. The increase in the grain moisture was quadratic and showed the same trend in both the corn and wheat. The grain moisture after spraying 10 L.t-1 showed little increase (0.8 %) as compared to the initial moisture content. Thus, the application of any spray volume as used in this study made no difference for a possible better uniformity in the distribution of insecticide... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stored products; Chemical control; Application technology; Desorption; Hygroscopic equilibrium. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300003 |
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| Decaro,Ricardo Augusto; Decaro Junior,Sergio Tadeu; Ferreira,Marcelo da Costa. |
| ABSTRACT: For a crop protection product to achieve its goal, the product must be applied and remain on the leaves until it is absorbed. This situation may be compromised due to rainfall after spraying, thus necessitating reapplication which increase the overall cost. Application technology research has focused on alternatives and solutions to mitigate this effect through the use of adjuvants. The objective of this research was to evaluate the deposit of spraying liquid on citrus seedlings using the products spirodiclofen, propargite, imidacloprid, lambda cyhalothrin, copper oxychloride, and copper hydroxide with water mixed with the adjuvants polydimethylsiloxane and phosphatidylcholine. Seedlings were subjected to simulated rains of 10mm at intervals of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fungicides; Insecticides; Miticides; Pulverization; Application technology. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000100013 |
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| Mota,Alisson A. B.; Antuniassi,Ulisses R.; Chechetto,Rodolfo G.; Oliveira,Rone B. de; Silva,Anne C. A. e. |
| The air included in droplets generated by spray nozzles directly int0erferes in transport, deposition and retention of the droplets after its impact on the target. The objective of this study was to analyze the interference of adjuvants in the amount of air included in droplets generated by spray nozzles. The treatments were composed by four spray solutions containing mineral oil, vegetable oil, surfactant and water, and three spray nozzles, two air induction type and one pre-orifice. The air included was calculated by the difference between the volume of spray mix (air plus liquid) and only the liquid, which was made by means of sprayed samples captured in a funnel and collected in a graduated cylinder. The surface tension was estimated by the gravimetric... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Application technology; Air induction; Pre-orifice; Surface tension. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000600020 |
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| Costa,Lilian L.; Silva,Henrique J. P. Soares da; Almeida,Dieimisson P.; Ferreira,Marcelo da C.; Pontes,Nadson de C.. |
| ABSTRACT Biological insecticides can be another pest control method used in integrated pest management; hence there is a demand for scientific information about these products to understand the appropriate application technique. The aim of this study was to evaluate the spray spectra data by different nozzle types using biological insecticide isolated and with adjuvants, as well the surface tension of these spray solutions. For droplet spectra data, a particle size analyzer was used and for surface tension of the spray solution, the method of pendant drop was used. Among the nozzles tested, ADI 11002 provided greater droplets median diameter volume, a lower percentage of droplets with diameters less than 100 μm and also the highest coefficient of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coefficient of uniformity; Volumetric median diameter; Application technology; Tensiometer. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200292 |
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| Cavalieri,Jhonatan D.; Raetano,Carlos G.; Madureira,Ronaldo P.; Moreira,Lais L. Q.. |
| ABSTRACT Tractor traveling speed can influence the quality of spraying depending on the application technology used. This study aimed to evaluate the droplet spectrum, the deposition and uniformity of spray distribution with different spraying systems and traveling speeds of a self-propelled sprayer in two phenological stages of the cotton plant (B9 and F13). The experimental design was randomized blocks and treatments were three spraying techniques: common flat spray tips; tilted flat jet with air induction, at 120 L ha-1; and rotary atomizer disk, 20 L ha-1, combined with four traveling speeds: 12, 15, 18 and 25 km h-1, with four replications. Spraying deposition was evaluated for both leaf surfaces from the cotton plant apex and base (stage B9) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Application technology; Rotary atomizer disk; Rotating nozzle; Gossypium hirsutum L. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000601042 |
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| Oliveira,Rone B.; Marubayashi,Rodrigo Y. P.; Gandolfo,Marco A.; Alves,Karina A.. |
| ABSTRACT The method used for removal of brilliant blue dye may have an influence in interpreting the results of spraying deposition studies. The aim of this study was to assess the number of washings and water volumes for brilliant blue dye removal from soybean leaflets and glass slides in fungicide sprayings with and without adjuvants. A completely randomized experimental design was used in a 3 × 3 × 2 × 4 factorial scheme. The factors consisted of number of washings (1st, 2nd, and 3rd), water volume (15, 20, and 30 mL), target type (soybean leaflets and glass slides), and spray solutions (fungicide ProdutorBR® 0.5 L ha−1 without and with the adjuvants vegetable oil Agr’óleo® 0.5% v v−1, mineral oil Nimbus® 0.5% v v−1, and surfactant Silwet® 0.04% v v−1).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Application technology; Adjuvants; Experimental methods. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300611 |
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| Graziano,Carlos E. P. L.; Alves,Karina A.; Gandolfo,Marco A.; Dario,Gustavo; Oliveira,Rone B.. |
| ABSTRACT: Spraying of crop protection products can be affected by weather conditions and spray nozzles, altering deposition patterns and coverage of the target surface. The objective of this research was to analyze the quality of sprayings performed in three periods of the day (9:00 am, 2:00 pm, and 6:00 pm), using two different droplet sizes (fine and coarse) in soybeans. Coverage and deposition were evaluated in the upper, middle, and lower portion of soybean canopy. Spraying the products at 2:00 pm increased leaf coverage in the medium portion but also increased losses to the soil. Spray nozzles with fine droplet sizes provided greater coverage and deposition in the medium and upper portion of the crop for the sprayings performed in the morning. If... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coverage; Deposition; Endo-drift; Spraying time; Application technology. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601183 |
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| Hoffmann,Laercio L.; Roehrig,Rafael; Boller,Walter; Forcelini,Carlos A.. |
| ABSTRACT Maintaining homogeneity in the distribution of fungicidal sprays applied throughout the plant, minimizing the variation between the upper and lower third of the plant, is one of the main challenges for application technologies with regard to soybean crops. To increase the deposition and leaf coverage of sprayed compounds, especially in the middle and lower thirds of the plant, we developed and tested alternative assisted boom sprayer systems. In this study, three assisted boom sprayer systems (Vortex®, Dropleg®, and chain curtain) were evaluated, in addition to the conventional system, in terms of the deposition and coverage of the leaf surface they achieved in the upper, middle, and lower thirds of plants using the fluorescent tracer Helios SC... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Application technology; Dropleg®; Vortex®. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000200198 |
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| Landim,Thiago N.; Cunha,João P. A. R. da; Alves,Guilherme S.; Marques,Matheus G.; Silva,Sérgio M.. |
| ABSTRACT Adjuvants are tools to maximize pesticide spray quality. This study aimed to evaluate the interaction effects between adjuvants and the fungicide azoxystrobin + benzovindiflupyr on the physicochemical characteristics, droplet evaporation time, and spray droplet size. The experiment was carried out using a 2×6 factorial scheme, in which the first factor was the absence or presence of the fungicide mixture (water or water + fungicide) and the second factor was the presence of different adjuvants (water and five adjuvants). The parameters evaluated were surface tension, pH, viscosity, electrical conductivity, droplet evaporation time, volume median diameter, percentage of droplets smaller than 100 μm, and relative amplitude of the droplet spectrum.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spray solution additives; Droplet spectrum; Surfactants; Application technology. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000500600 |
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| Calore,Ricardo A.; Ferreira,Marcelo da C.; Rodrigues,Nara E. L.; Otuka,Alessandra K.. |
| ABSTRACT Scarlet Morning Glory is considered to be an infesting weed that affects several crops and causes serious damage. The application of chemical herbicides, which is the primary control method, requires a broad knowledge of the various characteristics of the solution and application technology for a more efficient phytosanitary treatment. Therefore this study aimed to characterize the effect of rainfall incidence on the control of Ipomoea hederifolia, considering droplet size, surface tension, contact angle of droplets formed by herbicides liquid on vegetal and artificial surfaces, associated to adjuvants and the volumetric distribution profile of the spray jet. The addition of the adjuvants to the herbicide spraying liquid improved the application... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Application technology; Scarlet morning glory; Glyphosate; Paraquat. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000400756 |
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| Garcia,Luiz C.; Machado Júnior,Carlos R.; Bochnia,Giovana P.; Weirich Neto,Pedro H.; Raetano,Carlos G.. |
| ABSTRACT The objective of this study was to determine whether the combination of adjuvants to fungicides significantly alters the spray physicochemical characteristics, and potentiates the chemical control of foliar diseases, in that it may affect yield components in wheat (Triticum aestivum) and soybean (Glycine max). The experimental design was completely randomized for the spray physicochemical characteristics, and randomized blocks for the culture variables analyzed, with four treatments and five replications. Treatments consisted of control (no fungicide spraying in the shoot), with fungicides only in plant shoots, fungicides + 0.25% of the spray with adjuvant of methyl ester base of soybean oil, and fungicides + 0.05% of the spray with adjuvant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Disease; Glycine max; Application technology; Triticum aestivum. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000601110 |
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| de Lima Junior,Izidro dos S.; Degrande,Paulo E.; de Souza,Cristiano M. A.; Viegas Neto,Antonio L.. |
| ABSTRACT Application technology factors may be influenced by changes in plant architecture, such as height and leaf area. This study aimed to evaluate which angle of sprayer displacement in the application of pesticides in relation to the direction of cotton sowing, cultivated in the ultra-narrow row, narrow row, and conventional systems, provides the best application quality characteristics in the different thirds of plants. The experiment was installed in a split-plot design with four replications in the 3 × 4 factorial scheme, composed of three cotton cultivation systems and four angles of sprayer displacement in relation to the direction of the sowing rows. The evaluated characteristics were mean volumetric diameter, density and coverage of droplets,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Application technology; Droplet deposition; Third of plants. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600927 |
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| Carvalho,Fernando K.; Antuniassi,Ulisses R.; Chechetto,Rodolfo G.; Mota,Alisson A. B.; Kruger,Greg R.. |
| ABSTRACT The effect of blade angle on droplet size spectrum of five rotary cage atomizers and one rotary disc atomizer used in Brazil was evaluated in a high speed wind tunnel, with an air speed of 180 km h−1. This study included the characterization of the droplet size spectrum, via laser diffraction instrument, generated by three blades angles, of 45, 60 and 75 degrees. The spray solution was composed of Picoxystrobin+ Cyproconazole fungicide (SC), at 20 mL c.p. L−1, and at a flow rate of 6 L min−1. As the angle decreased from 75 to 45 degrees, the rotational speed of the atomizers increased and the volume median diameter (VMD) decreased. However, increasing the rotational speed also increased the percentage of droplets smaller than 100 µm (% < 100... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Application technology; Atomization; Spray drift; Pesticides. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000601118 |
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| Registros recuperados: 56 | |
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