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      Deposição de calda e controle de plantas daninhas empregando pulverizador de barra convencional e com barra auxiliar, em volumes de calda reduzidos Translated title: Spray deposition and weed control using a conventional boom sprayer and an auxiliary boom sprayer, with reduced spray volumes

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          Abstract

          A tecnologia de aplicação influencia diretamente o sucesso da dessecação de pré­semeadura, auxiliando na eficácia de controle das plantas daninhas. O experimento avaliou a deposição de calda herbicida em plantas daninhas, a perda para o solo e a eficácia de controle dessas plantas promovido por duas tecnologias de aplicação (pulverizador de barra convencional e pulverizador com barra auxiliar de arrasto, variando os volumes de calda entre eles: 100 e 150 L ha-1 no sistema convencional e 30 e 50 L ha-1 no sistema com barra auxiliar). O experimento foi instalado em delineamento de blocos casualizados com cinco repetições. Foi adicionado um traçador à calda contendo o herbicida glyphosate, para ser detectado por espectrofotometria. A deposição de calda nas plantas daninhas não diferiu em função da presença ou ausência da barra auxiliar de pulverização e do volume de calda aplicado, demonstrando a viabilidade do uso de volumes de aplicação entre 30 e 50 L ha-1 com a barra auxiliar. As perdas para o solo foram maiores quando foi utilizada a barra convencional do pulverizador. A eficácia de controle das plantas daninhas foi muito boa, independentemente do tratamento empregado.

          Translated abstract

          Application technology directly influences the success of desiccation, supporting the effectiveness of weed control. This work evaluated herbicide deposition on the weeds, spray loss to the soil and the efficacy of weed control by two application technologies (conventional boom sprayer and auxiliary boom sprayer, by varying the spray volumes between them: 100 and 150 L ha-1 in the conventional system and 30 and 50 L ha-1 using the auxiliary boom). The experiment was conducted in a randomized block design with five replications. A tracer was added to the solution containing the herbicide glyphosate, to be detected by spectrophotometry. Spray deposition on the weeds did not differ depending on the presence or absence of the auxiliary boom, nor the spray volumes, showing the feasibility of using spray volumes between 30 and 50 L ha-1 with the auxiliary boom. Soil losses were higher when the conventional spray boom was used. The efficacy of weed control was very good, regardless of the treatment used.

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          Most cited references17

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          Recomendaciones sobre unificación de los sistemas de evaluación em ensayos de control de malezas

          (1974)
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            Effect of droplet size and carrier volume on performance of foliage-applied herbicides

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              Aspectos de resistência de plantas daninhas a herbicidas

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                pd
                Planta Daninha
                Planta daninha
                Sociedade Brasileira da Ciência das Plantas Daninhas (Viçosa )
                1806-9681
                June 2014
                : 32
                : 2
                : 447-454
                Affiliations
                [1 ] Universidade Federal de Uberlândia Brazil
                Article
                S0100-83582014000200023
                10.1590/S0100-83582014000200023
                c80b42a5-63f4-467d-a60e-6b1ac4f076a5

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0100-8358&lng=en
                Categories
                PLANT SCIENCES

                Plant science & Botany
                desiccation,spray,application technology,dessecação,pulverização,tecnologia de aplicação

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