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A system to evaluate the performance of hydraulic nozzles used in stored grain preotection trials Scientia Agricola
Vásquez-Castro,Javier A.; Baptista,Gilberto C. de; Gadanha Jr.,Casimiro D.; Trevizan,Luiz R.P..
We developed a system to evaluate the performance of hydraulic nozzles used in stored corn and wheat grain protection experiments. An insecticidal mix was used as test fluid to determine the transversal volumetric distribution and droplets spectrum of a model TJ-60 8002EVS hydraulic nozzle. A mobile application system was built to apply a rate equivalent to 5 L t-1 and obtain theoretical concentrations of 10 and 0.5 mg kg-1 of fenitrothion and esfenvalerate, respectively. The corn and wheat grains were spread out as a fine layer. Three glass slides (0.1 × 0.05 m) were placed on the top surface of the grains to ensure that the intended application rate was achieved. After treatment, the deposits on both matrices were analyzed by gas chromatography. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Application technology; Gas chromatography; Insecticide deposits; Corn; Wheat.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000600001
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ADJUVANTS IN FUNGICIDE SPRAYING IN WHEAT AND SOYBEAN CROPS REA
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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Amazônia como polo mundial de produção agrícola sustentável. Infoteca-e
HOMMA, A. K. O.; MARCOLAN, A. L.; VALENTIM, J. F..
Com ciência e tecnologia, a Amazônia Legal vem se transformando, nos últimos anos, em um grande polo de produção mundial. Na região da Amazônia Legal, o avanço de cultivos de grãos como soja, arroz, algodão e milho, além de espécies como dendezeiros, cacaueiros, cafeeiros, cupuaçuzeiros, açaizeiros, castanheiras, laranjeiras, coqueiros, jambus e urucuzeiros e até reflorestamento têm ocorrido pela mudança de perfil da "pecuarização" para a "agriculturização". Tudo com o emprego de ciência e tecnologia, além de respeito ao meio ambiente.
Tipo: Artigo de divulgação na mídia (INFOTECA-E) Palavras-chave: Agricultura sustentable; Tecnología de aplicación.; Agricultura Sustentável; Tecnologia Agrícola.; Sustainable agriculture; Application technology.
Ano: 2021 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1132210
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APPLICATION HEIGHT IN HERBICIDES EFFICIENCY IN BEAN CROPS Planta Daninha
PEREIRA,G. A. M.; BARCELLOS JR,L. H.; SILVA,D. V.; BRAGA,R. R.; TEIXEIRA,M. M.; SILVA,A. A.; RIBEIRO JR,J.I..
ABSTRACTInadequate herbicide application can result in failures in weed control and/or poisoning of the crops, resulting in yield losses. In this research were assessed the effects of the sprayer nozzle boom height in the distribution of the spray solution for weed control, influencing intoxication of beans and crop yield. Experiments were conducted in laboratory and field conditions. In laboratory, the performance of flat spray tip TT 11002 was assessed at heights 0.20, 0.30, 0.40 and 0.50 meters with respect to the target surface. In the field the same heights were assessed in applications of herbicides fomesafen, fluazifop-P-butyl and fomesafen + fluazifop-P-butyl. There was an inverse relationship between the height of the spray boom and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris; Application technology; Mixture of herbicides.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000300607
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Bacterial diversity dynamics in microbial consortia selected for lignin utilization. Repositório Alice
MENDES, I. V.; GARCIA, M. B.; BITENCOURT, A. C. A.; SANTANA, R. H.; LINS, P. de C.; SILVEIRA, R.; SIMMONS, B. A.; GLADDEN, J. M.; KRUGER, R. H.; QUIRINO, B. F..
Abstract:Lignin is nature?s largest source of phenolic compounds. Its recalcitrance to enzymatic conversion is still a limiting step to increase the value of lignin. Although bacteria are able to degrade lignin in nature, most studies have focused on lignin degradation by fungi. To understand which bacteria are able to use lignin as the sole carbon source, natural selection over time was used to obtain enriched microbial consortia over a 12-week period. The source of microorganisms to establish these microbial consortia were commercial and backyard compost soils. Cultivation occurred at two different temperatures, 30°C and 37°C, in defined culture media containing either Kraft lignin or alkaline-extracted lignin as carbon source. iTag DNA sequencing of...
Tipo: Artigo de periódico Palavras-chave: Biotecnologia; Carbono; Lignina; Composto Fenólico; Lignin; Phenolic compounds; Carbon; Energy conversion; Biotechnology; Degradation; Application technology.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134421
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BLADE ANGLE EFFECT ON DROPLET SIZE SPECTRUM OF ROTARY ATOMIZERS USED IN BRAZIL REA
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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BRILLIANT BLUE DYE REMOVAL IN FUNGICIDE SPRAYING REA
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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Computer programs for analysis of droplets sprayed on water sensitive papers Planta Daninha
Cunha,J.P.A.R.; Farnese,A.C.; Olivet,J.J..
The use of water-sensitive papers is an important tool for assessing the quality of pesticide application on crops, but manual analysis is laborious and time-consuming. Thus, this study aimed to evaluate and compare the results obtained from four software programs for spray droplet analysis in different scanned images of water-sensitive papers. After spraying, papers with four droplet deposition patterns (varying droplet spectra and densities) were analyzed manually and by means of the following computer programs: CIR, e-Sprinkle, DepositScan and Conta-Gotas. The diameter of the volume and number medians and the number of droplets per target area were studied. There is a strong correlation between the values measured using the different programs and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Spray quality; Pesticides; Sprayer; Droplet size; Application technology.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300023
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CONSTRUCTION AND PRACTICAL APPLICATION OF A CANOPY OPENER DEVICE REA
PRADO,EVANDRO P.; Pogetto,MÁRio H. F. Do A. Dal; Cerqueira,Denise T.R. De; Raetano,Carlos G.; Costa,Saulo Í. De A..
ABSTRACT: Accurate application of pesticides is difficult for crops with dense leaves, such as soybean crops. To improve spray deposits on the lower leaves of soybean plants, the aim of this study is to build a canopy opener (CO) from a previously developed prototype and to assess its practical application and efficiency on soybean crops. Laboratory experiments were conducted to determine the amount of spray deposits on the top and the lower leaves using a Brilliant Blue dye. The influence of the CO device on the number of flowers knocked down during spraying was also investigated. The data showed that the use of the CO attached to the spray boom enabled more spray deposit on the lower leaves and less spray depositson the upper leaves compared with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Application technology; Soybean; Spray deposit.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000601126
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Deposição de calda em espigas artificiais por três pontas de pulverização em aplicação de fungicida para o controle da brusone do trigo. Repositório Alice
BOARETTO, C.; BOLLER, W.; MACIEL, J. L. N.; DANELLI, A. L. D.; MACHADO, J. D. U. F.; FORCELINI, C. A..
Tipo: Artigo de periódico Palavras-chave: Pyricularia oryzae; Brusone; Doença de planta; Controle químico; Magnaporthe oryzae; Plant diseases and disorders; Chemical control; Application technology.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1089003
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Deposit of pesticides without and with adjuvants on citrus seedlings following different intervals of artificial rain Ciência Rural
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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DEPOSITION AND COVERAGE OF SOYBEAN LEAF SURFACES BY SPRAYS APPLIED USING DIFFERENT ASSISTED BOOM SPRAYER SYSTEMS REA
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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Distribution pattern, surface tension and contact angle of herbicides associated to adjuvants on spraying and control of Ipomoea hederifolia under rainfall incidence REA
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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Drift curves from spray applications on commom bean crop Ciência e Agrotecnologia
Bueno,Mariana Rodrigues; Cunha,João Paulo Arantes Rodrigues da; Santana,Denise Garcia de.
ABSTRACT In order to avoid the occurrence of drift in pesticide applications, it is fundamental to know the behavior of sprayed droplets. This study aimed to determine drift curves in pesticide applications on common bean crop under brazilian weather conditions, using different nozzle types and compared them with the "German" and "Dutch" drift prediction models. The experiment was conducted in Uberlândia, Minas Gerais/Brazil, in completely randomized design with ten replications and 4 x 20 split-plot arrangement in space. Drift deposited on collectors located over ground level was resulted by 150 L ha-1 carrier volume applications through four nozzle types (XR 11002 (fine droplets); AIXR 11002 (coarse droplets); TT 11002 (medium droplets); TTI 11002...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Droplet size; Spray nozzle; Exponential regression; Application technology.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000600621
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DROPLET DISTRIBUTION AS A FUNCTION OF COTTON INTERROW SPACING AND ANGLES OF SPRAYER DISPLACEMENT REA
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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DROPLET SPECTRA AND SURFACE TENSION OF SPRAY SOLUTIONS BY BIOLOGICAL INSECTICIDE AND ADJUVANTS REA
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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Effect of adjuvants on the amount of air included in droplets generated by spray nozzles REA
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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Effect of mini-sprinkler irrigation system on Heterorhabditis baujardi LPP7 (Nematoda: Heterorhabditidae) infective juvenile Scientia Agricola
Lara,Juan Carlos; Dolinski,Cláudia; Sousa,Elias Fernandes de; Daher,Rogério Figueiredo.
Entomopathogenic nematodes (EPNs) are currently being used as successful biological control agents of soil-dwelling insect pests. Previous field and greenhouse studies demonstrated that application techniques and non-biotic factors (temperature and pressure) have a significant effect on EPNs efficacy. The objective of this study was to evaluate the influence of an irrigation spray application system on the viability, infectivity and host search capability of Heterorhabditis baujardi LPP7 (Nematoda: Heterorhabditidae) infective juveniles (IJ). Two assays were proposed. Their viability was evaluated under the microscope after the IJ passed through the irrigation system. Infectivity on Galleria mellonella larvae, and host search capability, as evidenced by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological pest control; Application technology; Viability; Infectivity; Search capability.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000400017
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EFFECT OF NOZZLES, APPLICATION RATES, AND ADJUVANTS ON SPRAY DEPOSITION IN WHEAT CROPS REA
Machado,Willian A.; Silva,Sérgio M.; Carvalho,Stephan M.; Cunha,João P. A. R. da.
ABSTRACT The use of insecticides is common in pest management in wheat crops but may lead to higher production costs and environmental contamination. Therefore, a more comprehensive and uniform distribution of plant protection products in the desired target is recommended. The objective of this study is to evaluate the effect of different spray nozzles, application rates, and adjuvants on droplet spectrum and spray deposition in wheat crops. The physicochemical characteristics of the spray mixture, droplet spectrum, and spray deposition in wheat plants were evaluated. The lower application rate (75 L ha−1) combined with the use of the twin flat fan tip AS7030 and the adjuvant sodium lauryl ether sulfate (SLES) yielded droplets with a larger diameter....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Application technology; Spray mixture volume; Droplet spectrum; Insecticide drift.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000100083
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Effect of spray volume on the moisture of stored corn and wheat grains BABT
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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